• Email:
  • 24 Hours Online Service For You:

30 tonne per hour grinding mill

Home / News & Article / 30 tonne per hour grinding mill
Author:SKM Chat Online

A sizable through-flow location facilitates the flow of venting air, which in turn guarantees a low pressure drop across the mill and thus lower power consumption.Zenith steel slag ball mill pile reclamation is simple to operate and sustain, ensuring production effectiveness and high mill run time.

The material is returned to the jaw crusher and then processing does not meet. Thus, it forms a closed loop of the gypsum powder production system.First of all, the natural gypsum block is evenly delivered to the jaw crusher by the vibration feeder for the primary crushing. After the vibration sieve screening, will meet the delivery requirements of the particle size of material to the grinding mill.

The impact crusher production efficiency is higher, simple structure, convenient movement, so the impact crusher has been developing rapidly. In 1942, the Germans summarized the squirrel-cage crusher, invented the AP series impact crusher.In 1924, the Germans developed single and double rotor two models impact crusher firstly, and the crusher structure is similar to modern squirrel-cage crusher, because no matter from the structure, or from the analysis on working principle, it has the characteristics of the impact crusher.

30 tonne per hour grinding mill

All of those machines perform with each other as a low cost, high efficiency and integrate magnetite beneficiation line.Zenith machinery could provide you entire set of magnetite beneficiation line such as jaw crusher, ball mill, classifier, magnetic separator, flotation separator, thickener, dryer, and auxiliary equipment including vibrating feeder, elevator, and belt conveyor.

The use according to claim 32,characterised in that the copolymer comprises as monomers adipic acid, N-(2-aminoethyl)-1,2-ethanediamine and epichlorohydrin.Thus one of the main uses of the composite or a slurry thereof is its use as a filler or pigment, e. In the present case the equivalent diameter is considered with respect to the sedimentation properties of the particles investigated. Organic microparticles with inorganic nanoparticlesComparative experiment 1: Mixture of organique particles 1 and nano-calcium carbonate composition:750 g based on dry matter of the nano calcium carbonate composition, was mixed with 250 g based on the dry matter of the slurry of organic microparticles 1, in a Pendraulik agitator with a toothed disk with a diameter of 3.In a preferred aspect, the organic pigment particles and/or filler particles have an essentially spherical structure, preferably a hollow spherical or hollow hemispherical structure.g.A coating colour comprising a composite according to any one of claims 1 through 16 or a slurry according to claim 24, wherein the coating colour preferably has a solids content of 25 to 75 wt% solids, more preferably 30 to 70 wt%, especially preferably 30 to 40 wt% solids, and/or the amount of composite, based on the total solids content in the coating colour, is 3 to 97 wt%, preferably 10 to 90 wt%, especially preferably 85 ± 10 wt%.60 wt% sodium polyacrylate with a Mw of about 35000 to 40000 g/mol, based on the total dry weight of the nano dolomite as dispersant/grinding aid, at a solids content of 69.g.In a preferred aspect within the scope of the present invention, a copolymer that is also crosslinked with epichlorohydrin is used as the binder. However, the examples use only calcium carbonates.The grinding beads that were used, made of zirconium silicate and baddeleite were 0.g.g.2 14.g.5 wt%, e.1 Solids content: 47., in the form of a powder or an aqueous solution.-, preferably more than 75 wt% dolomite mineral, more preferably more than 90 wt%, especially preferably more than 98 wt% dolomite mineral.72 12 2.e.g. Due to the closed hollow sphere or open hollow hemisphere, the result is an increased amount of light scatter, which leads to an increased opacity, among other things, Also, the closed hollow sphere, e. The time required to filter 200 mL was measured.1 wt% to 0.5 13.The viscosity of the slurry in wet grinding is preferably less than 2500 mPa·s, more preferably less than 1500 mPa·s, in particular less than 1000 mPa·s, or better yet, less than 500 mPa·s and especially preferably in the range from 50 to 500 mPa·s, e.4 µm, especially preferably 0.The composite according to claim 13,characterised in that the binder is a copolymer of adipic acid with N-(2-aminoethyl)-1,2-ethanediamine and epichlorohydrin.0 µmThe particle size was determined by SEM. For example, a mixture of 80 wt% inorganic pigment microparticles and/or filler microparticles with 20 wt% water may nevertheless have a solid consistency.9 Solids content: 36. Dialkanolamines and trialkanolamines that are preferred for use include for example diethanolamine, N-alkyldialkanolamines, such as N-methyl- and N-ethyldiethanolamine and triethanolamine.34 Solids content: 34. The time to filter 200 mL was measured. This may be an advantage for use in interior and exterior wall paint and coatings on buildings., these are binders with which those skilled in the art are well familiar such as those used in coating papers or as binders in wall paint.25 wt%.P., EV -2+ type with a disk spindle of 3 or 4 and 100 rpm.25 wt%.5 to 100 g/m2 are used, preferably 2 to 50 g/m2, especially preferably 5 to 25 g/m2 per side of paper.2 16.77 0.75 %) was introduced under the same stirring conditions and homogenized for 10 minutes.A widely used technique for producing such pigment or filler mixtures is described inDE 33 12 778 A1andDE 43 12 463 C1 , for example, and consists of mixing and joint grinding of a mineral filler such as natural calcium carbonate with a mineral filler such as talc.5 to 2 mm in size.6 wt% to further yield the following size distribution:Diameter (nm) Number (N) of particles in N% Wt%200 97. The filtering time shows clearly that the segregation of nanoparticles and microparticles was reduced significantly.To ensure better dispersion, one or more dispersants may also be added to each of the slurries or mixtures, except for the binder solution or slurry, e., Nadavin DHN (15%). Platelet-like particles are understood here to be particles in which the ratio of length to width and/or height is1.4 to about 1. For example a defined pH must be maintained exactly to obtain the best possible zeta potential, which is different for each combination of substances.The features defined in the independent claims are used to achieve these objects. After filtering the filter residue was dried at 105 °C for 3 h. Microparticles segregate from the nanoparticles and are situated at the bottom of the coating while nanoparticles are at the top of the coating.The composite may also be used in multiply coated systems, e.03 80 1.g.3 to about 50 µm, even more preferably in a range from about 0. Organic pigments and/or fillers that can be used in the present invention include those distributed by RohmHaas, for example, under the brand name Ropaque, e. The problem of segregation is not mentioned.The composite may be used as a filler or pigment in papermaking or in paper finishing, e. The molecular weight Mw of such products is preferably in the range of 2000 to 150000 g/mol; a Mw of 15000 to 50000 g/mol, e.5).The dolomite particles in the nanometer range are preferably produced by wet grinding and/or are brought to the desired equivalent diameter, in particular when the material is natural dolomite." The term "solid" should be used to describe only the consistency of the substance used, which may have a considerable moisture content. In addition, the pore volume of the composite to be achieved originally is influenced and altered first by the flocculation and secondly by the precipitated calcium carbonate thus formed. The binder here is either added to the pigment and/or filler particles or to the dolomite composition and the resulting mixture is combined with the respective second component and homogenized. The solids content of the intermediate was 89 wt% after adding the binder. Dolomite rock is a special carbonate rock predominantly consisting of dolomite mineral, i.A combination of various mixing systems may also be used.According to this invention, the spherical equivalent diameter of the pigment and/or filler particles is primarily in the micrometer range, while the spherical equivalent diameter of the dolomite particles is primarily in the nanometer range., Norway, or South America.1 wt%Figure 3 shows clearly that the nano-calcium carbonate is not segregated from the organic microparticles and is on the surface of the organic microparticles.2 to 2 mm, but also 0.4 23.4200-400 2. In addition, further precipitation of calcium carbonate alters the structure of the original nanoparticle/microparticle structure and necessarily leads to the introduction of another pigment, namely the precipitated calcium carbonate formed by neutralization., based on polyethylenes, polypropylenes, polyethylene terephthalates, polystyrenes or mixtures thereof.03 Solids content: 66.5 hours. 1.7800-10000.04 Solids content: 35.Figure 2 shows the SEM of a mixture of organic microparticles and nano-dolomite without a binder.4 wt%Figure 6 shows clearly that the nano-dolomite is segregated from the inorganic microparticles.Without grinding aids and/or dispersants, the dolomite may preferably be dispersed and/or ground at a solids content of up to 30 wt%, e.Artificial reef systemCA2818445A1(en)2012-07-312014-01-31Rohm And Haas CompanySulfonic acid monomer based compositionsKR101292160B1(en)*2013-01-232013-08-08(주)하누Manufacturing method of plastic goods using waste agricultural filmHUE034671T2(en)*2014-02-212018-02-28Omya Int AgProcess for the preparation of a calcium carbonate filler productJP6480054B1(en)*2018-03-282019-03-06関西ペイント株式会社Water-based coating composition containing calcium hydroxide and / or magnesium hydroxideFamily Cites Families (44)* Cited by examiner, † Cited by third partyPublication numberPriority datePublication dateAssigneeTitleBE572493A(en)1957-10-30JPS593566B2(en)*1976-03-111984-01-25Unitika LtdAU3297878A(en)*1977-02-141979-08-09Lankro Chem LtdTalc dispersionDE2759203C2(en)1977-12-311985-10-31Hoechst Ag, 6230 Frankfurt, DeFI64674C(en)1982-04-291983-12-12Ruskealan Marmori OyFoerfarande foer framstaellning av en fyllnadsmedels- och / eller belaeggningspigmentblandning foer papperUS4547331A(en)1982-05-191985-10-15International Osobouw Sales Office N.5 wt%) and 75 g product from experiment 7 (solids content: 66.The nano-dolomite composition is usually provided in the form of an aqueous slurry, while the pigment microparticles and/or filler microparticles may be used in solid form or in the form of an aqueous slurry. This is a problem with which those skilled in the art are familiar, especially in coating an absorbent, substrate using coaling colours with a low solids content.4 g of the slurry of organic microparticles 1 was stirred into the composition during minutes.5) were added and mixed for further 5 min. The composites here comprising hollow spherical organic microparticles may in particular also induce an increase in the thermal insulation effect.4 wt% to yield the following size distribution:Diameter (nm) Number (N) of particles in N% Wt%200 98.The so-called spherical equivalent diameter is a measure of the size of an irregularly shaped particle., acetic acid, but should also be stable at least for a short time in media containing substances reacting acidic such as phenolic or phenol-formaldehyde or urea- formaldehyde resins, but also substances producing acid as a reaction product during cross-linking such as polymers containing silicon, i. At a solids content of more than 30 wt%, it may be better to perform the dispersion and/or grinding in the presence of grinding aids and/or dispersants. The filtering time shows clearly that the segregation of nanoparticles and microparticles is even lower than using nano-calcium carbonate.095 3., in the pre-coating and/or intermediate coating and/or top coating and/or single coating., polyethylene glycols, ethylene oxide-propylene oxide-ethylene oxide block copolymers or alkanolamines, e.g. The ratio of acrylic acid monomers in the copolymer with ethylene monomers is preferably 1:4 to 1:50, especially preferably 1:4 to 1:10 and especially 1:5. The advantage of organic microparticles in the composite is derived, anlong other things, from the different physical properties such as density, conductivity and colour of organic materials in comparison with inorganic mineral substances.05 to 2. at a stirring speed of 930 rpm.Nano-dolomite composition 2100 kg of Southern Norwegian dolomite rock was treated as described above in step a) and b) to yield an equivalent diameter of 5 µm (± 0. Khashoggi IndustriesCompositions for manufacturing fiber-reinforced, starch-bound articles having a foamed cellular matrixDE4312463C1(en)1993-04-161994-07-28Pluss Stauffer AgCaCO3 3 -Talkum coating pigment slurry, process for its preparation and its useJP3567334B2(en)*1993-11-012004-09-22神鋼電機株式会社Epoxy varnish composition and method of useUS5449402A(en)1994-02-171995-09-12Whalen-Shaw; MichaelModified inorganic pigments, methods of preparation, and compositions containing the sameDE69513205T2(en)1994-07-142000-05-11Krueger A S SoborgMethod and device for the purification of waste water by the activated sludge methodUS5584924A(en)1994-08-261996-12-17Thiele Kaolin CompanyOpacifying kaolin clay pigments having improved rheology and process for the manufacture thereofJP4225402B2(en)*1994-12-132009-02-18株式会社日本触媒Zinc oxide fine particles and their usesUS5759258A(en)1995-03-151998-06-02Minerals Technologies Inc. In none of the examples grinding of, for example, two chemically different materials in the presence of a binder is disclosed.In an especially preferred embodiment of the present invention, a copolymer of adipic acid with N-(2-aminoethyl)-1,2-ethanediamine and epichlorohydrin is used as the binder. If the pigment and/or filler microparticles and the nano-dolomite composition are used dry, however, enough water must be used first to yield an aqueous slurry.3 µm) by a combination of dry grinding and classifying, using 1000 ppm monopropylene glycol based on dry dolomite.An EAA copolymer having a melt viscosity of 24300 mPa·s at 200°C, 88300 mPa·s at 170°C and 367000 mPa·s at 140°C is especially preferred.250.e.It is also possible during grinding and/or dispersing to use other monomeric or polymeric additives in addition to the grinding aids and/or dispersants, e.Filtering time: 2.5 hours.The inventive composites may also be used in sealing substances, e.1 µm. It is known that shear rates of more than 106 sec-1 may occur in coating with the doctor blade at 1500 m/min. Wet grinding preferably is performed in an attritor mill such as a Dynomill using grinding balls made of glass, porcelain, and/or metal; preferably, however, grinding balls are used made of, e.The composite according to claim 1 or 2,characterised in that the organic pigment and/or filler particles are selected from the group comprising pigment and/or filler particles based on polyethylenes, polypropylenes, polyethylene terephthalates or polystyrenes. Ploughshare mixers function according to the principle of the mechanically produced fluidized bed.A filter test was performed to illustrate the segregation tendency by preparing 200 mL of a slurry with 0. The binders used for grinding may be based on styrene-acrylate or styrene-butadiene, i.3 to 25 µm, most preferably in a range from 0. A large portion of the nano-dolomite composition used is permanently bound to the surface of the microparticle, which allows an open structure in use of the composite and thus allows a reduction in packing density and/or an increase in pore volume, among other things.Mixing is performed at a room temperature of about 20°C to 25°C. As grinding balls, 100 kg Iron-Cylpebs™ having an average diameter of 25 were used.2 to 5 mm, preferably 0. Dolomite from South West Norway, from the region around Bergen, is used especially preferably.The pigment and/or filler particles preferably have an essentially spherical structure, in particular, a hollow spherical, hollow hemispherical or platelet-like structure, where "hemispherical" structure is understood to refer to any structure derived from a hollow sphere having a surface that is not closed.47 Solids content: 45.Organic pigment and/or filler particles based on polystyrene, e.1 to about 10 wt%, preferably about 0.g.Due to the platelet-like structure of the inorganic micropigments and/or microfillers such as talc and/or mica and the surface properties of dolomite, the inventive composite allows the use of a "platelet-like dolomite" for example.The composite according to any one of claims 3 through 5,characterised in that the organic pigment particles and/or filler particles are particles based on polystyrene, preferably in the form of polystyrene hollow spheres with a spherical equivalent diameter of 0. Mixtures of such substances are used, e. The inventive composite preferably contains 95 to 5 wt%, preferably 80 to 20 wt%, more preferably 75 to 25 wt% dolomite particles, based on the total dry weight of the composite.2 to 25 µm, preferably of 0.g. Platelet-like and hollow hemispherical micropigments and/or microfillers have proven to be especially advantageous because they have a good holdout due to their shape. Pigment particles such as calcium carbonate and plastic particles thus are present in separate layers.00 66. Experiment 4 according to the invention: Composite of 25 wt% organic microparticles 1 and 75 wt% nano-dolomite composition 1 and binder:700 g of the nano-dolomite composition 1 was placed in the Pendraulik and 566. Due to the porous structure and low segregation of the composites, this yields an optimal liquid transfer with a good retention power of suspended particulate matter at the same time.3 µm)10 kg of the obtained dry ground dolomite intermediate having a spherical equivalent diameter of 5 µm (± 0. The starting temperature was 21°C and the final temperature after the 15-minute shearing time was 41°C.Acid stability in slightly acidic medium3 samplers with 4 g each based on the dry matter of the composite corresponding to 3 g nano-dolomite based on the dry matter, were stored at 23 °C for the time mentioned below each in 100 ml 2.Step c)10 kg of the obtained dry ground dolomite intermediate having a spherical equivalent diameter of 5 µm (± 0.The grinding beads that were used, made of zirconium silicate and baddeleite were 0.In comparison with limestone predominantly consisting of calcium carbonate, CaCO3, dolomite rock is harder and more brittle and has a higher density., Ropaque® HP-1055 or Ropaque® AF-1353.In addition, an object of the present invention is the use of the inventive composites in the production of paints or plastics, in sealing substances and the use of certain binders being especially suitable for the production of the inventive composites containing pigment and/or filler microparticles and dolomite nanoparticles. The binders, which must have an affinity for the hydrophilic components as well as the organophilic components to manifest their binding function, are selected from special polymers and/or copolymers., thermally, e.g.The resulting composite slurry had the following characteristics:Brookfield viscosity measured after 5 s/60 s/120 s: 838/810/805 mPa·s pH 8.Another method for improving whiteness according toWO 97/32934consists of coating the pigment particles with other pigment particles such as finely divided particles of precipitated calcium carbonate which are initially present in the form of agglomerates, but without using a binder, which can lead to the problems mentioned above such as flocculation. Monoethanolamine is preferably used.In a special aspect, about 90% to , preferably 92% to 99%, more preferably 94% to 98%, especially preferably 96% to 98%, e.The nano-calcium carbonate composition was ground continuously using Northern Norvegian marble having a spherical equivalent diameter or 45 µm by wet grinding in vertical 1500 litre attritor ball mill in two passes using a total of 0.2 to 5 µm. Almost no secondary filter cake of nano-calcium carbonate was formed on the membrane filter blocking the pores.Acid stability in slightly acidic medium:3 samples with 4 g each based on the dry matter of the composite corresponding to 3 g nano-dolomite based on the dry matter, were stored at 23 °C for the time mentioned below each in 100 ml 2. The solids content was diluted with water to a concentration of 50 wt%; 272.10 2.5 µm, more preferably in a range of from 0.525 wt%, based on the total solids content of a 42 wt% active aqueous solution of a sodium salt of polyacrylic acid (Mw: about 4000 g/mol; pH 8.The grinding beads that were used, made of zirconium silicate and baddeleite were 0.Filtering time:20 hours (The experiment was stopped).0 hours.The use according to any one of claims 25 or 26,characterised in that the composite is used for modifying or controlling the pore volume of the paper or the coating. Flocculated aggregates can be problematical in general in paper applications because they cause diffuse light scattering on the surface which leads to loss of the paper gloss.0 33.5 wt% solids content of the nanoparticle/microparticle mixture and filtering the slurry using a membrane filter with a pore diameter of 0.5 wt%, aqueous solution of a copolymer of adipic acid with N-(2-aminoethyl)-1,2-ethanediamine and epichlorohydrin having the following characteristics:Total chloride content: about 1.A filter test was performed to illustrate the segregation tendency by preparing 200 mL of a slurry with 0.1 10.3 to 1.5 to about 3 wt%.g.1 µm, especially 1 µm. The samples spontaneously start effervescing releasing CO2.65 55.5 wt%Figure 4 shows clearly that the nano-dolomite is not segregated from the organic microparticles and is on the surface of the organic microparticles.5 wt% quartzabout 3 wt% calciteStep b)25 kg of the product from the hammer mill was ground and classified to a spherical equivalent diameter of 5 µm (± 0.5 to 0.3ADE102007004124B4(en)2007-01-262007-01-26Fillers and / or pigments comprising a composite or an aqueous slurry of a composite of inorganic and / or organic microparticles and nano-dolomite particlesPCT/EP2007/055523WO2007141271A1(en)2006-06-092007-06-05Composites of inorganic and/or organic microparticles and nano-dolomite particlesApplications Claiming Priority (2)Application NumberPriority DateFiling DateTitlePL07729902T PL2038350T3(en)2006-06-092007-06-05Composites of inorganic and/or organic microparticles and nano-dolomite particlesSI200730942T SI2038350T1(en)2006-06-092007-06-05Composites of inorganic and/or organic microparticles and nano-dolomite particlesPublications (2)Publication NumberPublication DateEP2038350A1EP2038350A1(en)2009-03-25 EP2038350B1true EP2038350B1(en)2012-03-21FamilyID=38537730Family Applications (1)Application NumberTitlePriority DateFiling DateEP07729902AActiveEP2038350B1(en)2006-06-092007-06-05Composites of inorganic and/or organic microparticles and nano-dolomite particlesCountry Status (24)CountryLinkUS(1)US9944798B2(en)EP(1)EP2038350B1(en)JP(1)JP5379681B2(en)KR(1)KR101547923B1(en)AR(1)AR061138A1(en)AT(1)AT550389T(en)AU(1)AU2007255381B2(en)BR(1)BRPI0712150B1(en)CA(1)CA2653073C(en)CL(1)CL2007001613A1(en)DK(1)DK2038350T3(en)EA(1)EA014790B1(en)ES(1)ES2384581T3(en)HR(1)HRP20090290A2(en)IL(1)IL195035D0(en)MX(1)MX2008014767A(en)NO(1)NO341095B1(en)NZ(1)NZ572664A(en)PL(1)PL2038350T3(en)PT(1)PT2038350E(en)RS(1)RS20090204A(en)SI(1)SI2038350T1(en)TW(1)TWI352101B(en)WO(1)WO2007141271A1(en)Families Citing this family (24)* Cited by examiner, † Cited by third partyPublication numberPriority datePublication dateAssigneeTitleCN101248108A(en)*2005-08-022008-08-20托普奇姆公司Aqueous dispersion of hybrid particles consisting of organic or inorganic pigment particles and organic nano-particles and process for preparing the sameUS8758886B2(en)2005-10-142014-06-24International Paper CompanyRecording sheet with improved image dry timeDE102006026965A1(en)*2006-06-092007-12-13Omya Development AgComposites of inorganic and / or organic microparticles and nano-calcium carbonate particlesFI20070635A0(en)*2007-02-052007-08-22Stora Enso OyjPress SubstratesDE102007059736A1(en)2007-12-122009-06-18Omya Development AgSurface mineralized organic fibersDE102007059681A1(en)2007-12-122009-06-18Omya Development AgComposites of inorganic microparticles with a phosphated surface and nano alkaline earth carbonate particlesPL2559809T3(en)2008-03-312016-03-31Int Paper CoRecording sheet with enhanced print quality at low additive levelsJP5611531B2(en)*2008-09-022014-10-22富士フイルム株式会社Processed pigment, pigment dispersion composition, photocurable composition, color filter, and method for producing color filterEP2172517B1(en)2008-10-062018-11-21Rohm and Haas CompanyComposite particlesUS9067782B2(en)*2009-11-202015-06-303M Innovative Properties CompanyInorganic pigment compositions comprising surface-modified nanoparticles, and methods of makingUS8652593B2(en)2009-12-172014-02-18International Paper CompanyPrintable substrates with improved brightness from OBAs in presence of multivalent metal saltsUS8574690B2(en)2009-12-172013-11-05International Paper CompanyPrintable substrates with improved dry time and acceptable print density by using monovalent saltsUS8440053B2(en)2010-04-022013-05-14International Paper CompanyMethod and system using surfactants in paper sizing composition to inhibit deposition of multivalent fatty acid saltsUS8608908B2(en)2010-04-022013-12-17International Paper CompanyMethod and system using low fatty acid starches in paper sizing composition to inhibit deposition of multivalent fatty acid saltsWO2011139481A1(en)*2010-05-042011-11-10International Paper CompanyCoated printed substrates resistant to acidic highlighters and printing solutionsCN103003492B(en)2010-07-232015-04-08国际纸业公司Coated printable substrates providing higher print quality and resolution at lower ink usageUS8697203B2(en)2010-11-162014-04-15International Paper CompanyPaper sizing composition with salt of calcium (II) and organic acid, products made thereby, method of using, and method of makingTWI568811B(en)2011-02-232017-02-01歐米亞國際公司Coating composition comprising submicron calcium carbonate-comprising particles, process to prepare same and use of submicron calcium carbonate-comprising particles in coating compositionsEP2537901A1(en)*2011-06-222012-12-26bene_fit systems Co. No permeable secondary filter bed was formed.3 wt%, especially preferably in an amount of 0., at a solids content of 72 to 80 wt%.This experiment clearly shows that the nano-dolomite composites with organic micropigment have a very high acid resistance and even after long storage times in acidic media for several days still have a significantly higher acid stability than comparable nano-calcium carbonate composites.5 hours. If the composite is a pre-coating and/or intermediate coating, another application of coating may be applied thereto using conventional pigments with which those skilled in the art are familiar.5 to 10 cm are used as grinding media, especially preferably iron-cylpebs with a diameter of 2.This experiment clearly shows that the nano-dolomite composites with organic micropigment have a very high acid resistance and even after long storage times in acidic media for several days still have a significantly higher acid stability than comparable nano-calcium carbonate composites.5 wt% solids content of the nanoparticle/microparticle mixture and filtering the slurry using a membrane filter with a pore diameter of 0. The resulting reaction mixture was sheared for 15 minutes with the Pendraulik agitator at a stirring speed of 2800 rpm, whereby after half of the shearing time, the pH was adjusted to 9 with 1., as pigments or fillers in papermaking but especially in paper finishing as in coating, e.It is likewise possible to mix and homogenize the slurries in particular when the pigment and/or filler particles are first combined with the binder by using a ploughshare mixer.3 µm to 1., 96 wt% of the talc particles have a spherical equivalent diameter of10 µm, about 79 to 82 wt%, e.The subject of the present invention thus also includes fillers or pigments comprising an inventive composite or a slurry thereof., with amines, preferably selected from the group comprising 2-amino-2-methyl-1 propanol, 3-amino-1-propanol, 2-[bis(2-hydroxyethyl)amino]ethanol and/or alkali metal ions such as potassium, lithium and/or sodium or mixtures thereof, preferably sodium.g.The pigment particles and/or filler particles and the nano-dolomite are preferably used in a ratio of 1:20 to 20:1, especially in a ratio of 1:4 to 4: 1, more preferably in a ratio of 1:3 to 3:1 or 1:2 to 2:1, but also in a ratio of 1:1, based on the dry weight., in the form of polystyrene hollow spheres having a spherical equivalent diameter of about 0.Dolomite slurries having a low solids content of less than or equal to 60 wt%, for example, may preferably be concentrated by physical means, e. Hornopolymers or copolymers of acrylic acid such as those available from BASF, Ludwigshafen, Allied Colloids, Great Britain or COATEX, France are especially preferred.2 µm (pressure: about 25 mbar, water suction pump; room temperature).It facilitates adhesion of the nanoparticles to the surface of the microparticles.2 to 100 µm, especially from 0.9 g of 10 wt% NaOH and dispersed with 0., filled with air, has a thermal insulation effect.g.The following results were obtained:SampleStorage time before filtration [h]Weight composite [g]Weight dolomite% dolomite of the starting weight dolomite1 1 3. The final temperature after mixing was 41°C.The following results were obtained:SampleStorage time before filtration [h]Weight composite [g]Weight dolomite% dolomite of the starting weight dolomite1 1 3. As soon as the conditions deviate from the optimal, the forces of repulsion become predominant and the components undergo segregation., water which may be removed from the hollow spheres in any additional physical steps such as drying, during and/or after use in the present invention.1 11.30 2.4 µm and most preferably in a range from 0.Coated media for improved output tray stacking performanceFI20020521A0(en)2002-03-192002-03-19Raisio Chem OyPaper surface treatment composition and its useFR2864455B1(en)2003-12-242006-03-17Coatex SasUse of structured water-soluble polymers obtained by controlled dispersing radical polymerization and agent for grinding mineral materialsUS7651216B2(en)*2004-06-242010-01-26Hewlett-Packard Development Company, L.Both dry and wet grinding steps may be performed one after the other, but then the last grinding step is preferably a wet grinding., the chain length, one or more monovalent amines such as monoalkanolamines may be used during polycondensation. When segregation occurs, nano-dolomite passes through the pores first but over a period of time a secondary filter cake which is almost impermeable forms on the membrane filter and blocks the pores.Moisture content:0., in a range from about 0.g.A particle in the nanometer range is defined within the scope of this invention as a particle having a spherical equivalent diameter in the sub-micron range of less than or equal to 200 nm., polydiallyldimethylammonium chloride (PolyDADMAC) or copolymers of acrylic acid with cationic monomers or mixtures of such dispersants., paper. In paper finishing, e. Quartz sand having an equivalent spherical diameter of 0.Preparations obtained on the membrane filter in this way were sputtered with gold and evaluated in the SEM at various enlargements.3 to about 12 µm., 15 to 30 wt%, more than 30 wt%, preferably more than 50 wt%, e.Use of a composite according to any one of claims 1 through 16 or a slurry according to claim 24 as a filler or pigment.The method according to any one of claims 17 to 19,characterised in that the composition of dolomite particles in the nanometer range is provided in the form of an aqueous slurry and the pigment microparticles and/or filler microparticles are preferably provided in solid form or in the form of an aqueous slurry, wherein inorganic pigment and/or filler microparticles are preferably provided in solid form, organic pigment and/or filler microparticles are preferably provided as an aqueous slurry, and the binder is preferably provided in the form of an aqueous slurry or a solution., to increase the opacity.g.9 to 1.5 wt% solids content of the nanoparticle/microparticle mixture and the slurry using a membrane filter with a pore diameter of 0.g.3 to 10 µm.05 to 5 wt%, more preferably 0.Mixtures of nanoparticles and microparticles of different chemical compositions are used because they have certain different properties which are advantageous to combine to impart the desired properties to the end product, e. Almost no secondary filter cake of nano- dolomite was formed on the membrane filter blocking the pores., enlarged and controlled., about 1 µm are especially advantageous in the present invention.72 12 2. This is used to calculate the volume V of a particleV = 0., Alejandro A., polystyrene hollow spheres which have essentially the same diameter which may be 0.A test was performed to illustrate the segregation tendency by preparing 200 mL of a slurry with 0.The percentage of the particle count N% of nanoparticles was calculated from the measurement results thus obtained using the following method:The values are taken from the Sedigraph curve.1 12.1 to 10 wt%, preferably 0.g. The time required to filter 200 mL was measured., 1 wt%, but also in an amount of about 0.These dispersants may additionally be added to the binder in an amount of 0.g.This experiment clearly shows that the nano-calcium carbonate composites are not acid resistant.In papermaking, the composite is preferably used in amounts of 0.The composite according to any one of claims 1 through 9,characterised in that it contains 5 to 95 wt%, preferably 20 to 80 wt%, more preferably 25 to 75 wt% pigment particles and/or filler particles, based on the total dry weight of the composite and/or 95 to 5 wt%, preferably 80 to 20 wt%, more preferably 75 to 25 wt% dolomite particles, based on the total dry weight of the composite. Choppers and/or dispersers are used to disperse lumps when operating dry., as Nadavin, e.2 µm (pressure: about 25 mbar, water suction pump; room temperature). Combination of inorganic microparticle/nano-dolomite composite and organic microparticle/nano-dolomite compositeExperiment 8 according to the invention: Composite of 50 wt% composite of experiment 4 and 50 w% composite of experiment 7:145 g product from experiment 4 (solids content: 36. Belger, Schweizerische Vereinigung der Lack- und Farben-Chemiker, XVII FATIPEC Congress, Lugano, September 23-28, 1984). Sodium and magnesium are especially preferred. However, the use of such composites may be problematical in the respective applications because of interactions with other charged components.The resulting composite slurry had the following characteristics:Brookfield viscosity measured after 5 min/60 min/120 min: 610/580/583 mPa·s pH 9. It is also possible that acidic food such as fruit, e.g.g.The term "solid" as used here is not necessarily to be understood as meaning "dry. The time to filter 200 mL was measured., as thickeners or viscosity control agents.3 to about 5 wt%, especially preferably about 0.Thus, a method for forming chemically aggregated porous pigment composites is described inWO 92/08755 , where an aqueous slurry of mineral particles such as calcium carbonate is prepared and a polymer or copolymer containing carboxylic acid groups is added to the slurry to cause flocculation.The method according to any one of claims 21 or 22,characterised in that the dispersants are added in an amount of 0.800 g nano-dolomite composition 2 was placed in a Pendraulik stirrer, type LD 50 with toothed disk having a diameter of 3 cm and mixed with 85.2 to 25 µm, more preferably in a range from about 0.4 to about 1.5 to 3 wt% binder, based on the total dry weight of the composite.US 2005/0287313thus describes a mixture of microparticles that are present concurrently and held together by fixation in a binder tailored to the requirements of the melting process.5 molar acid having a pKa4, at 23 °C, at least 50 wt%, preferably at least 60 wt%, more preferably at least 70 wt%, but also more than 75 wt%, and after 12 hours of storage, at least 30 wt%, preferably at least 40 wt%, more preferably at least 45 wt%, but also more than 50 wt% of the dolomite component is still present.5 wt% Mw1000 g/mol Brookfield viscosity of the aqueous solution: 80 mPa·s ± 30 mPa·s pH 3. The different types of pigments or fillers have hydrophilic and/or organophilic regions which allow binding to take place by way of special binders.22 12 1. The filtration time was very short due to the open structure of the composite in comparison with experiments 1, 2 and 3.5 to 2 mm in size.g. Another aspect of this invention is a method for manufacturing the inventive composite, wherein the pigment microparticles and/or filler microparticles, the nano-dolomite composition, and the binder are provided and mixed.g. After a short homogenisation time of 2 min 219.22 wt%Figure 1 shows clearly that the nano-calcium carbonate is segregated from the organic microparticles.3 to about 15 µm, in particular in a range from about 0., the binder and/or a pigment or a partial fraction of a pigment is segregated from the whole and penetrates into the paper surface. The filtration time is very short due to the open structure of the composite in comparison with experiments 1, 2 and 4. The filtration time is short in comparison with comparative experiment 6.Commercially available EAAs that are very suitable and preferably have an acrylic acid content of 20 mol% are distributed by BASF, Germany, and Dow, USA, for example.010.5 cm are used.2 µm yields the 0.03 0.A filter test was performed to illustrate the segregation tendency by preparing 200 mL of a slurry with 0.g. The polymers and/or copolymers may be neutralized with monovalent and/or polyvalent cations or they may have free acid groups.2. The Pendraulik stirrer was equipped with a toothed disk having a diameter of 3. After filtering the filter residue was dried at 105 °C for 3 h., of precipitated calcium carbonate, and a carrier fraction comprising platelet-like pigment particles, including talc or plastic pigment particles and at least one binder.1 µm value (100 nm), the difference between 0. In addition filtering of liquid acidic food and beverages such as vinegar is not possible with the materials mentioned above being acid sensitive.5 cm and the stirring speed was 7500 rpm.9 to 1.EAAs and their salts may be used in an amount of 0.The composite according to any one of claims 1 through 8,characterised in that 90 to , preferably 92 to 99%, more preferably 94 to 98%, especially preferably 96 to 98%, especially 97 ± 0. The solids content was diluted with water to a concentration of 50 wt%; 79.5 to 100 g/m2, preferably 2 to 50 g/m2, especially preferably 5 to 25 g/m2 per side of paper, and/or is used in the pre-coating, the intermediate coating, the top coating and/or a single coating, and the paper is coated on one and/or both sides and one or more of the coatings contains the composite on one or both sides, wherein the paper may be calendered or uncalendered paper.2 µm (pressure: about 25 mbar, water suction pump; room temperature).For example, anionic grinding aids and/or dispersants may be used as the grinding aids and/or dispersant, preferably selected from the group comprising horno- or copolymers of polycarboxylic acid salts based on, e.g. Dolomite is not suitable as a microparticle according to this invention.5 cm as the stirrer and a stirrer speed of 7500 rpm at a starting temperature of 22°C for 15 minutes while stirring.1 wt%, based on the total solids content of a 42 wt% active aqueous solution of a sodium salt of polyacrylic acid (Mw: about 4000 g/mol; pH 8., paper coating can be combined advantageously.The filtering time shows clearly the segregation of nanopaticles and microparticles. However, since the calcium ions are added in the form of alkaline chemical compounds such as calcium hydroxide, they form alkaline intermediates that can have negative effects, e.23 Solids content; 52.5 wt%, preferably 0.In an alternative aspect, pigment particles and/or filler particles are first mixed with the dolomite composition and the resulting reaction mixture is combined with the binder and homogenized. 80/32" (distributed by the company HOSOKAWA™) was used. Coating holdout is understood by those skilled in the art to refer to whether the coating remains on the paper surface or penetrates partially to completely into the paper surface or whether a portion, e.g. The samples were dispersed using a highspeed stirrer and ultrasound. To reduce sheen, a very diverse scattering is required, which can be provided by the inventive composites. mineral, filler or pigment slurry with high solids contentUS5082887A(en)1989-12-291992-01-21Ecc American Inc.g.g.A particle in the micrometer range is defined according to this invention as a particle having a spherical equivalent diameter in the sub-micron range of greater than 0. Suitable monovalent cations include for example sodium, lithium, potassium and/or ammonium., in an amount of 0.6 17. lemons are exposed to packaging paper, which may lead to an undesired deposit of calcium salts on the food.US 5,454,864 ,US 5,344,487andEP 0 573 150also describe pigment composites whose production is based on electrostatic attraction forces between the carrier particles and the coating particles.The use according to claim 25,characterised in that the composite or the slurry is used in papermaking, preferably in amounts of 0.5% of the dolomite particles, based on the amount N of the dolomite particles, have a spherical equivalent diameter of less than 200 nm, especially in a range from 20 to 200 nm or 50 to 180 nm, preferably less than 150 nm, especially in a range from 70 to 150 nm, more preferably less than 100 nm.g.g.3The same type of membrane filter was used as for the segregation tests.03 80 1. Their measurement is performed in an aqueous solution of 0.5 wt% solids content of the nanoparticle/microparticle mixture and filtering the slurry using a membrane filter with a pore diameter of 0.Through a targeted choice of the composite with regard to its composition and size, the pore volume of the paper and/or the coating may also be varied by coverage or noncoverage by the composite particles, e.2Tpatent/DK2038350T3/enactive2007-06-05EPEP07729902Apatent/EP2038350B1/enactiveActive2007-06-05BRBRPI0712150-4Apatent/BRPI0712150B1/enactiveIP Right Grant2007-06-05NZNZ572664Apatent/NZ572664A/ennot_activeIP Right Cessation2007-06-05EAEA200900002Apatent/EA014790B1/ennot_activeIP Right Cessation2007-06-05PTPT07729902Tpatent/PT2038350E/enunknown2007-06-06TWTW096120245Apatent/TWI352101B/ennot_activeIP Right Cessation2007-06-06CLCL200701613Apatent/CL2007001613A1/enunknown20082008-10-30ILIL195035Apatent/IL195035D0/enunknown20092009-01-06NONO20090085Apatent/NO341095B1/ennot_activeIP Right Cessation2009-01-09HRHR20090290Apatent/HRP20090290A2/ennot_activeApplication DiscontinuationAlso Published AsPublication numberPublication dateCA2653073C(en)2015-07-28TWI352101B(en)2011-11-11AU2007255381B2(en)2012-02-09CL2007001613A1(en)2008-04-18HRP20090290A2(en)2009-08-31CA2653073A1(en)2007-12-13ES2384581T3(en)2012-07-09NZ572664A(en)2010-08-27EP2038350A1(en)2009-03-25DK2038350T3(en)2012-07-09IL195035D0(en)2009-08-03TW200806742A(en)2008-02-01AT550389T(en)2012-04-15US20090169894A1(en)2009-07-02KR101547923B1(en)2015-08-27BRPI0712150B1(en)2017-10-10NO341095B1(en)2017-08-21RS20090204A(en)2010-06-30PL2038350T3(en)2012-09-28JP2009540036A(en)2009-11-19MX2008014767A(en)2009-02-11WO2007141271A1(en)2007-12-13BRPI0712150A2(en)2012-02-22KR20090023598A(en)2009-03-05AU2007255381A1(en)2007-12-13SI2038350T1(en)2012-07-31AR061138A1(en)2008-08-06US9944798B2(en)2018-04-17EA200900002A1(en)2009-06-30PT2038350E(en)2012-06-27JP5379681B2(en)2013-12-25NO20090085L(en)2009-03-06EA014790B1(en)2011-02-28Similar DocumentsPublicationPublication DateTitleEP2906638B1(en)2020-05-27Particulate phyllosilicate materialUS20180016466A1(en)2018-01-18Composition and method for controlling the wettability of surfacesJP2018012638A(en)2018-01-25Precipitated calcium carbonate particle and use thereofUS10259945B2(en)2019-04-16Pigment particle composition, its method of manufacture and its useJP6162223B2(en)2017-07-12Treatment of calcium carbonate-containing materials for increased filler retention in paperJP5192149B2(en)2013-05-08Novel inorganic pigment containing calcium carbonate, aqueous suspension containing the same and use thereofFI96695C(en)1996-08-12Pigment blend for paper industryUS9644100B2(en)2017-05-09Process for the manufacture of self-binding pigmentary particles, dry or in aqueous suspension or dispersion, containing inorganic matter and bindersTWI432528B(en)2014-04-01Precipitated calcium carbonate pigment, especially for use in inkjet printing paper coatingsRU2246510C2(en)2005-02-20Threaded filler or colorant, or inorganic material for paper, in particular, natural calcium carbonate-containing colorant, method for manufacturing, composition containing the same, and uses thereofCA2215500C(en)2004-09-28Ink jet recording paper incorporating novel precipitated calcium carbonate pigmentRU2562291C2(en)2015-09-10Self-binding pigment hybridAU2006233333B2(en)2012-09-13Precipitated calcium carbonate pigment, especially for use in inkjet printing paper coatingsUS6143064A(en)2000-11-07Pigment particles coated with precipitated calcium carbonate and a process for the preparation thereofCA2920439C(en)2020-01-07Hyperplaty clays and their use in paper coating and filling, methods for making same, and paper products having improved brightnessUS8517291B2(en)2013-08-27Process of manufacturing a co-ground calcium carbonate mineral of the GCC and PCC type with a specific steepness factor, obtained products and their usesUS5454864A(en)1995-10-03Layered composite pigments and methods of making sameAU759343B2(en)2003-04-10Kaolin pigments, their preparation and useKR100813785B1(en)2008-03-13Use of weakly anionic copolymers as dispersing and/or grinding aid agent of an aqueous suspension of mineral materialsUS6991677B2(en)2006-01-31Titanium dioxide-calcium carbonate composite particlesEP1940741B1(en)2018-11-07Economical process of manufacturing very fine co-ground calcium carbonate material of the gcc and pcc type, obtained products and their usesUS7341625B2(en)2008-03-11Method for the production of coated, fine-particle, inorganic solids and use thereofUS6814796B2(en)2004-11-09Pigment productsRU2572967C2(en)2016-01-20Self-binding pigment hybridRU2602119C2(en)2016-11-10Suspension of self-binding particles, method of its production and useLegal EventsDateCodeTitleDescription2009-03-25AXRequest for extension of the european patentExtensionstate:AL BA HR MK RS.4 wt% was stirred into this mixture during another 2 minutes and diluted with water to a solids content of 35 wt%. Subsequently, 2 wt% of a solution of a sodium salt of an ethylene-acrylic acid polymer (Na-salt of the commercially available product Primacor 5980i; 11.g.e.g.0 19. about 1.258.g.The inventive composite may also be used together with other conventional pigments and/or fillers.7 to 1. EXAMPLES:Production and description of nanoparticles that can be used according to the present inventionThe production of a known nano-calcium carbonate composition as well as of the nano-dolomite compositions suitable for the inventive composites is described below. It is describes how the platelet-like microparticles migrate to the paper surface due to segregation and thereby close pores between the fibres and thus prevent the nanoparticles from being able to penetrate into the surface.95 wt%., to improve the quality of the paper with regard to the opacity, whiteness and gloss of the paper or the printability and printing properties.5 molar acid having a pKa4, at 23°C, at least 50 wt%, preferably at least 60 wt%, more preferably at least 70 wt%, but also more than 75 wt%, and after 12 hours of storage, at least 30 wt%, preferably at least 40 wt%, more preferably at least 4., 80 wt% have a spherical equivalent diameter of5 µm and about 43 to 46 wt%, e.The sedimentation and thus the equivalent diameter of the particles as well as their distribution are determined for the present invention by using the sedimentation method, i. For example, the temperature during the process may usually be 20°C to 90°C, preferably between 20°C and 70°C.Therefore, additional methods for producing such composites have been developed based on crosslinking between the pigment and/or filler particles, where numerous internal cavities are formed that should improve the physical properties and especially the optical properties of the pigments and/or fillers.9 g of the slurry of organic microparticles 1 was stirred into the composition during 2 minutes.A number of such mixtures, their production and use are known in the state of the art, describing mainly calcium carbonate as nanoparticles., in an amount of 1 wt%. Production takes place, for example, by producing an intermediate product consisting of the reaction product of diethylenetriamine, mono-ethanolamine and adipic acid in distilled water.1 14., zirconium silicate, zirconium dioxide and/or baddcleite with a diameter of 0.g. The filtering time shows clearly that the segregation of nanoparticles and microparticles is low. The diameter is preferably in a range of 20 to 200 nm, 50 to 180 nm or 70 to 150 nm.5 molar acetic acid.The composite according to any one of claims 1 through 4,characterised in that the spherical equivalent diameter of the pigment particles and/or filler particles is essentially in a range from more than 0.Figure 5 shows the SEM of an inventive composite of organic microparticles, nano-dolomite, a binder and an EAA copolymers.3 to about 100 µm, preferably in a range from about 0.30 76.3 to 5 wt%, especially preferably 0. The starting temperature was 21°C and the final temperature after the 15-minute shearing time was 39°C., coating.5 wt%, e. In particular, condensation polymerisations can produce, e. The composite may be used for paper coated on one or both sides, in which case one or more of the coats on one or both sides will contain the composite. Mixing and homogenizing the slurry of the pigment, and/or filler particles and/or the dolomite composition inducing the admixture and stirring of the binder may be performed with a Pendraulik-type stirrer, preferably at room temperature.5 molar acetic acid.5 g binder as an aqueous solution with a solids content of 15.If the EAA salts are used, they are partially or completely neutralized, e.5 wt% solids content of the nanoparticle/microparticle mixture and filtering the slurry using a membrane filter with a pore diameter of 0. Grinding aids and/or dispersants such as sodium polyphosphates or sodium citrate may also be used to advantage either alone or in combination with others.The object of the present invention is thus to provide further pigment and/or filler composites as well as aqueous slurries as well as filter layers thereof which on the one hand will have very good optical properties, e.The equivalent diameter of the organic pigment and/or finer particles is preferably in a range of more than 0.00 2. After filtering the filter residue was dried at 105 °C for 3 h.g. Only a small secondary filter cake of nano- dolomite is formed on the membrane filter blocking the pores.3 to 50 µm, even more preferably in a range from 0. The difference between 0 and 0.3 to about 2 µm, preferably about 0.g.5 µm, or about 0.A filter test was performed to illustrate the segregation tendency and to determine the filtration speed by preparing 200 mL of a slurry with 0., due to friction during the dispersion process need not be counteracted. The amount of composite based on the total solids content of the coating colour may be 3 to 97 wt%, preferably between 10 and 90 wt%. Thus targeted segregation of nanoparticles and microparticles is a goal.5236 ⁢d 2and then the weight W of a particle (divided by the specific density; for dolomite, this corresponds to 2. Then 1.g.2 µm pore membrane filter. The samples show no spontaneous release of CO2 and no spontaneous effervescence. Preferred regulator substances include water-insoluble or dispersible latex binders, water-soluble or alkali-soluble organic and/or inorganic polymer binders and non-film-forming organic particles that are electrostatically bound to the pigment particles when mixed with them.Such a coating colour preferably has a solids content of 25 to 75 wt% solids, more preferably 30 to 70 wt% solids, especially preferably 30 to 40 wt% solids.g.Figure 3 shows the SEM of a known composite of organic microparticles, nano-calcium carbonate and a binder.The composite according to any one of claims 1 through 15,characterised in that it has such a high acid stability in week acids with a pKa of4 such as acetic acid that after 1 hour of storage of the composite in 2.The filtering time shows clearly the segregation of nanoparticles and microparticles.2 to about 100 µm, e.Advantageous dispersants include, for example, polyacrylic acid salts such as the sodium salt, sodium polyphosphate or polyacrolein/acrylate copolymers.The object of the invention is achieved by a composite, comprising inorganic and/or organic pigment and/or filler particles which are coated at least partially with a dolomite composition, and a binder. The flocculated pigment is preferably an aqueous suspension of filter cake particles.3 to 1.5The Brookfield viscosity of the slurry obtained was 285 mPa·s. The basic layer is compressible reducing the back trap mottling in offset printed pictures. Furthermore, there is no mention of the fact that nanoparticles are formed or nanomicrocomposites are produced by this grinding method. The starting temperature was 21°C and the final temperature after the 15-minute shearing time was 38°C., acrylic acid, methacrylic acid, maleic acid, fumaric acid or itaconic acid, acryl amide or mixtures thereof.0 wt%, preferably in an amount of 0., in paper and/or as a coating pigment.3.WO 2006/033952describes a material of paper and board comprising a substrate of paper or board, a basic layer on top of at least one substrate surface and a top layer on top of a surface of the basic layer, wherein said top layer comprises one or more pigments being dispersed in one or more binders, and said basic layer comprises thermoplastic particles having a low density such as the plastic particles Ropaque® HP-1055 and AF-1353 of Rohm and Haas and HS 2000NA and HS 3000NA of Dow Chemical Company, which are dispersed in one or more binders.The figures described below and the examples and experiments serve to illustrate the present invention and should not restrict it in any way.The composites according to the present invention have such a high acid stability in week acids with a pKa of4 such as acetic acid that after 1 hour of storage of the composite in 2. In the calculation, it is assumed that the particles are spherical and have a diameter d of the average of the difference range.The composite according to any one of claims 1 through 12,characterised in that the copolymer used as the binder is crosslinked with epichlorohydrin.Linear and branched chain, substituted and unsubstituted diamines and triamines are especially suitable as the second monomer of the binder polymer, especially N-(2-aminoethyl)-1,2-ethanediamine. It is calculated from a comparison of a property of the irregular particle with a property of a regularly shaped particle, e.The binder consists of a copolymer comprising as monomers one or more dicarboxylic acids and one or more monomers from the group of diamines, triamines, dialkanolamines or trialkanolamines. Du Pont De Nemours And CompanyTitanium dioxide particles having substantially discrete inorganic particles dispersed on their surfacesDE69729320T2(en)*1996-03-042005-06-02Fp-Pigments OyPigment particles coated with fallen calcium carbonate and method for the production thereofFR2777289B1(en)1998-04-092006-08-11Pluss Stauffer AgComposite compositions of co-structured or co-adsorbed mineral or organic pigments or pigments and uses thereofFR2787802B1(en)1998-12-242001-02-02Pluss Stauffer AgNovel filler or pigment or mineral treated for paper, especially pigment containing natural caco3, method for manufacturing same, compositions containing them, and applications thereofFI991438A(en)*1999-06-242000-12-25Neste Chemicals OyOrganic pigment granulate for paper coatingJP2001098185A(en)1999-07-292001-04-10Merck Japan LtdCalcium carbonate-coated flaky pigment and method for producing the sameUS6638585B2(en)2002-01-252003-10-28Hewlett-Packard Development Company, L.4 wt% was stirred into this mixture during another 2 minutes and diluted with water to a solids content of 35 wt%., isocyanates. Any object such as paper or plastic produced therefrom will therefore also be lighter, which may be an advantage in shipping for example. The final concentration after the concentration steps is preferably greater than 60 wt% solids content, especially preferably between 60 wt% and 78 wt%, e.US5454864A(en)*1992-02-121995-10-03Whalen-Shaw; MichaelLayered composite pigments and methods of making sameUS5344487A(en)1992-02-121994-09-06Whalen Shaw MichaelLayered composite pigments and method of making sameDE4213746C2(en)1992-04-251996-03-07Feldmuehle Ag StoraPrint media with a line on one or both sidesGB2267503B(en)1992-06-041996-07-24Tioxide Group Services LtdComposite pigmentary material comprising particles of opposite surface chargeGB9211822D0(en)1992-06-041992-07-15Tioxide Group Services LtdComposite pigmentary materialUS5662731A(en)1992-08-111997-09-02E. Comparative experiment 3: Composite of 25 wt% organic microparticles 1 and 75 wt% nano-calcium carbonate composition and binber:2100 g of the nano-calcium carbonate composition was placed in the Pendraulik and 1944.2 wt%Figure 5 shows clearly that the nano-dolomite is not segregated from the organic microparticles and is on the surface of the organic microparticles. a chemical reaction, e.3 to about 75 µm, more preferably in a range from about 0. The final temperature after mixing was 45°C. Ploughshare blades rotate close to the inside wall of a horizontal cylindrical drum and convey the components of the mixture out of the product bed into the open mixing space.4 to 1.Filtering time: 2.g.5 cm as the stirrer and a stirrer speed of 7500 rpm at a starting temperature of 22°C for 15 minutes while stirring.1 wt%, based on the total solids content of a 42 wt% active aqueous solution of a sodium salt of polyacrylic acid (Mw: about 4000 g/mol; pH 8.g.Preferably saturated or unsaturated branched or unbranched C2-C10 dícarboxylic acids, preferably C3-C9 dicarboxylic acids, C4-C8 dicarboxylic acids, C5-C7 dicarboxylic acids, especially adipic acid are used as the dicarboxylic acid monomers., 45 wt% have a spherical equivalent diameter of less than 2 µm are also advantageous.Based on the total dry weight of the composite, the binder is advantageously present in an amount of about 0., in the form of a filter cake. It is easy to see that the pore volume in experiment 3 has been increased significantly in comparison with that in experiment 1.3 to 15 µm, in particular in a range from 0.g. Mica may also be used such as that available from Aspanger Bergbau und Mineralwerke , Austria, for example., ethylene-acrylic acid copolymers (EAA) or salts thereof alone or in combination. 50 to 250 mPa·s, measured on a conventional Brookfield viscometer, e. Such products are described, for example, inDE 40 18 162and are available from the company Stockhausen , Krefeld under the name Prästol, for example.g.4 34. Description of microparticles that can be used according to the inventionOrganic microparticles 1: Ropaque® HP-1055 slurry (RohmHaas):Particle size: relatively uniform 1.5 µm, e.Another aspect of the present invention relates to the use of the inventive composite or a slurry thereof as a filtration aid, which is suitable for the use with weakly acidic liquids, either alone as a filter layer or in or on a natural and/or synthetic carrier material such as cotton fibres, cellulose fibres and polyamide fibres.1 to 2 mm may also be used.g.9 g/cm3)W = V / 2.Especially preferred according to the present invention for the nano dolomite applied for the coating is the use of ground natural dolomite rock containing at least 50 wt.The composites obtained by the inventive production process may be dried so that the composite is obtained as solids, but they may also be processed further as a slurry and as a renewed aqueous slurry of the dried composite so that not only the inventive composite per se but also an aqueous slurry thereof constitutes an aspect of the present invention.The present invention thus also relates to a filtration aid comprising an inventive composite or a slurry thereof. Such copolymers are sold by the company Lanxess, Germany and the company Mare in Italy, e.Another aspect of the present invention is the use in paints or plastics, e.0 wt% (determined at 120°C, 2 hours in an oven)Inorganic microparticles 1: Finntale C 10 slurry, aqueous slurry (MONDO Minerals, Finland):Particle size: 95 wt%10 µm80 wt%5 µm45 wt%2 µmThe particle size was determined by the sedimentation method using a Sedigraph 5100, Micromerities, USA., two dry and/or wet steps, preferably aqueous grinding steps, to yield the corresponding spherical equivalent diameter. No permeable secondary filter bed was formed. By targeted arrangement of the platelet-like microparticles on the paper surface, pores are closed and nanoparticles can no longer penetrate.Advantageous aspects of the present invention are derived from the subclaims and the description.1 wt% to 2 wt%, e.g.3 to 10 µm, preferably in a range from 0.A filter test was performed to illustrate the segregation tendency and the formation of the secondary fitter layer by preparing 200 mL of a slurry with 0.6 wt%Figure 7 shows clearly that the nano-dolomite is not segregated from the inorganic microparticles and is on the surface of the inorganic microparticles., in finishing the paper by coating, because the free nanoparticles become segregated from the microparticles and therefore may either occupy the pores of the paper and/or the coating or "float" there, i. The weight ratio of inorganic and/or organic pigment and/or filler particles to nano-dolomite is most especially preferably 1:3 or 3:1.The natural ground dolomite may be dispersed and/or ground in the form of an aqueous slurry in the presence of one or more grinding aids and/or dispersants, preferably at a solids content of more than 10 wt%, e.Use of a composite according to any one of claims 1 through 16 or a slurry according to claim 24 in paints, plastics or sealing compounds. The filtration time was very short due to the open structure of the composite in comparison with experiment 1.A method for producing a composite according to any one of claims 1 through 16, comprising the steps:a) providing the pigment and/or filler microparticles;b) providing the composition of dolomite particles in the nanometer range;c) providing the binder;d) mixing the pigment and/or filler particles and the dolomite composition from a) and b),wherein the binder is added to the pigment and/or filler particles from a) or to the dolomite composition from b) before step d) and the resulting reaction mixture is homogenized., a carbonatic calcium-magnesium-mineral having the chemical composition of CaMg(CO3)2 ("CaCO3 · MgCO3"). The term "segregation" refers to the process of separation of different elements in an observation field with a tendency toward spatial distribution of the elements according to certain properties., the coated paper and/or the pores of the composite itself so that wetting of the open pores of the paper and/or the coating and/or the composite by water is reduced, controlled and/or prevented.The method according to any one of claims 17 or 19 through 20,characterised in that one or more dispersants, preferably selected from the group consisting of polyacrylic acid salts such as the sodium salt, sodium polyphosphate or polyacrolein/acrylate copolymers; polymeric cationic and/or amphoteric dispersants, especially polydiallyldimethylammonium chloride (PolyDADMAC) or copolymers of acrylic acid with cationic monomers or mixtures of such dispersants, are added before adding the binder to the pigment and/or filler particles from a) or to the dolomite composition from b). Combinations of such mills or combinations of one or more such mills with cyclones and screens are also very suitable.WO 03/078734discloses a composition for surface treatment, in particular for coating paper, containing a nanoparticle fraction, e.Fusible inkjet recording materials containing hollow beads, system using the recording materials, and methods of using the recording materialsFR2873047B1(en)*2004-07-132007-10-05Coatex Soc Par Actions SimplifProcess for milling mineral materials in the presence of binders, aqueous suspensions obtained and uses thereofEP1712523A1(en)2005-04-112006-10-18Omya Development AGPrecipitated calcium carbonate pigment, especially for use in inkjet printing paper coatingsEP1712597A1(en)2005-04-112006-10-18Omya Development AGProcess for preparing precipitated calcium carbonate pigment, especially for use in inkjet printing pater coatings and precipitated calcium carbonateDE102006026965A1(en)2006-06-092007-12-13Omya Development AgComposites of inorganic and / or organic microparticles and nano-calcium carbonate particles20072007-05-31ARARP070102354Apatent/AR061138A1/ennot_activeApplication Discontinuation2007-06-05ATAT07729902Tpatent/AT550389T/enunknown2007-06-05WOPCT/EP2007/055523patent/WO2007141271A1/enactiveApplication Filing2007-06-05KRKR1020087029608Apatent/KR101547923B1/enactiveIP Right Grant2007-06-05AUAU2007255381Apatent/AU2007255381B2/ennot_activeCeased2007-06-05SISI200730942Tpatent/SI2038350T1/enunknown2007-06-05RSRSP-2009/0204Apatent/RS20090204A/enunknown2007-06-05JPJP2009513678Apatent/JP5379681B2/enactiveActive2007-06-05MXMX2008014767Apatent/MX2008014767A/enactiveIP Right Grant2007-06-05USUS12/227,031patent/US9944798B2/enactiveActive2007-06-05PLPL07729902Tpatent/PL2038350T3/enunknown2007-06-05CACA2653073Apatent/CA2653073C/enactiveActive2007-06-05ESES07729902Tpatent/ES2384581T3/enactiveActive2007-06-05DKDK07729902.1 µm, e. EP07729902A2006-06-092007-06-05Composites of inorganic and/or organic microparticles and nano-dolomite particlesActiveEP2038350B1(en)Priority Applications (3)Application NumberPriority DateFiling DateTitleDE102006026965ADE102006026965A1(en)2006-06-092006-06-09Composites of inorganic and / or organic microparticles and nano-calcium carbonate particlesDE102007004124. Only a small portion of the 75 wt% nano- calcium carbonate can be seen in the SEM.2400-600 0.4 g of a 42 wt% aqueous solution of a sodium salt of polyacrylic acid (Mw: about 4000 g/mol; pH 8.Nano-dolomite composition 1Step a) 100 kg of Southern Norwegian dolomite rock with a diameter of up to 10 cm was crushed with a hammer mill without the addition of any additives, such that a rock fraction was obtained having a portion of90 wt% of the particles in the range of 45 µm to 5 mm.7The same type of membrane filter was used as for the segregation tests.The resulting mixture had the following characteristics:Brookfield viscosity measured after 5 s/60 s/120 s: 160/160/152 mPa·s pH 8.03 80 1.The filtering time shows clearly the segregation of nanoparticles and microparticles.3 to 0. Use of a copolymer ofadipic acid with N-(2-aminoethyl)-1,2-ethanediamine and epichlorohydrin as the binder is especially preferred.1The Brookfield viscosity of the slurry obtained was 325 mPa·s.9600-800 0.3 µm) was then ground continuously by wet grinding in a recirculating horizontal 2 litre attritor ball mill (Dynomill) using a total of 1.Solids content: 29.In principle, both the pigment microparticles and/or filler microparticles as well as the nano-dolomite composition may be used either dry or as an aqueous slurry.The following results were obtained:SampleStorage time before filtration [h]Weight composite [g]Weight dolomite% dolomite of the starting weight dolomite1 1 3.A filtration aid comprising a composite according to any one of claims 1 through 16 or a slurry according to claim 24.5 wt% solids content of the nanoparticle/microparticle mixture and filtering the slurry using a membrane filter with a pore diameter of 0.The binder used in the inventive composite consists of a copolymer, comprising as monomers one or more dicarboxylic acids and one or more monomers from the group of diamines, triamines, dialkanolamines or trialkanolamines.Segregation of pigment and/or filler mixtures results in differences in pore volume in the coating, e.If the dolomite to be used does not yet have the desired or required fineness, i. As a ball mill a "Hosokawa™ Ball Mill S.1 wt% Na4P2O7.The binder may also contain other aids for copolymerization or other conventional aids and additives, e. Only a small portion of the 75 wt% nano-dolomite can be seen in the SEM., a sedimentation analysis in a gravimetric field using the Sedigraph 5100 from the company Micromeritics, USA., from about 0.The following results were obtained:Sample:Storage time before filtration [h]Weight composite [g]Weight CaCO3% CaCO3 of the starting weight CaCO31 1 1.5 wt% water (determined at 120°C, 2 hours in an oven)Description of binders that can be used according to the present inventionBinder15 ± 0.g.Especially suitable dolomites for the present invention are found, for example, in Europe, e.3 µm) was ground continuously by wet grinding in a recirculating horizontal 2 litre altritor ball mill (Dynomill) using a total of 1. At the outlet of the mill a classifier of the Alpine Turboplex™ 100 ATP type (distributed by the company ALPINE™) was installed. Many, especially paper applications and manufacturing processes such as fibre bleaching are performed in an at least slightly acidic environment such that the sensitivity to acids of calcium carbonate in such procedural steps may represent a significant problem. The preferred EAAs and/or their salts are those which in the unneutralised form have a melt viscosity of 3000 to 25000 mPa·s, 15000 to 100000 mPa·s and 50000 to 400000 mPa·s at 200, 170 and 140°C, respectively, preferably 3000 to 7000 mPa·s, 15000 to 20000 mPa·s and 50000 to 100000 mPa·s at 200, 170 and 140°C, respectively, and in particular have a melt viscosity of 15000 to 25000 mPa·s, 50000 to 100000 mPa·s and 300000 to 400000 mPa·s at 200, 170 and 140°C, respectively.US 2005/0287313relates to the subject of fusible print media based on a substrate and an ink-absorbing layer on the substrate. They support the adsorption of the binder. After 10 hours, there was still 90 mL of slurry to be filtered.the resulting mixture had the following characteristics:Brookfield viscosity measured alter 5 min/60 min/120 min: 77/79/81 mPa·s pH 8. It is known that the properties of such microparticles and nanoparticles with regard to retention in papermaking and coating "holdout" in paper finishing, e.WO 99/52984pertains to composite compositions of costructured or coadsorbed fillers which contain at least two different types of mineral or organic fillers or pigments, e.In the case of dry grinding, preferably ball mills are used and preferably iron and/or porcelain beads with a diameter of 0.5% of the dolomite particles, based on the number N of the dolomite particles, have a spherical equivalent diameter of less than 200 nm, preferably less than 150 nm, even more preferably less than 100 nm.000.g.g. The samples show no spontaneous release of CO2 and no spontaneous effervescence.5 wt% Organic chlorine content:0. KGReactive inorganic-organic composites, production and use of sameWO2014007926A1(en)*2012-07-042014-01-09KABILING, Jr. Filtering time:24 hours (the experiment was stopped).In wet grinding, the dispersants and/or grinding aids are advantageously present in an amount of about 0.In addition, however, cationic and/or amphoteric polymeric dispersants may also be added, e. For example, water hardness thus can be extremely increased, which in turn can lead to deposits later in the paper manufacturing process.Solids content: 26.5 wt% (determined at 120°C, 2 hours in an oven)Inorganic microparticles 2: Finntale P 05 powder, MONDO Minerals, FinlandParticle size: 96 wt%10 µm79 wt%5 µm43 wt%2 µmThe particle size was determined by the sedimentation method using a Sedigraph 5100, Micromeritics, USA.4 wt% was stirred into this mixture during another 2 minutes and diluted with water to a solids content of 35 wt%. The binder, preferably a polymer latex binder, causes the bond to form between individual particles and the two particle fractions at the top and bottom of the coating when the coating dries on the paper. The sum of differences is standardized to 100 mg and the quantities of each range are calculated from this.4400-600 0. Conventional ball mills, jet plate mills or attritor mills are especially suitable for dry grinding.g. The stability of these composites is based essentially on the forces of attraction such as van der Waals forces that can develop only when certain very specific conditions are met. Experiment 7 according to the invention: Composite of 25 wt% inorganic microparticles 2, 75 wt% nano-dolomite composition 2 and binder:800 g based on the dry matter of inorganic microparticles 2 were placed in a ploughshare mixer, model M 5 R, Lödige, Germany, and 106,7 g aqueous solution of the binder was added within 1 minute with the stirrer running and then homogenized for another 10 minutes., 0.5 to 5 mm, e.A method for producing a composite according to any one of claims 1 through 16, comprising the steps:a) providing the pigment and/or filler microparticles;b) providing the composition of dolomite particles in the nanometer range;c) providing the binder;d) mixing the pigment and/or filler particles and the dolomite composition from a) and b),wherein the binder is added to the mixture of pigment and/or filler particles from a) and to the dolomite composition from b) after step d) and the resulting reaction mixture is homogenized.The resulting composite slurry has the following characteristics:Brookfield viscosity measured after 5 min/60 min/120 min: 613/537/521 mPa·s pH 8. Experiment 5 according to the invention: Composite of 25 wt% organic microparticles 2 and 75 wt% nano-dolomite composition 1, binder and ethylene-acrylic acid-copolymer (EAA):350 g of the nano-dolomite composition 1 and 264.01 wt% to 1 wt%, based on the total dry weight of the composite, preferably in an amount of 0.6 wt%) are mixed together and homogenized in aPendraulik stirrer, type LD 50 with toothed disk having a diameter of 3 cm for 10 mm. To obtain a dried composite, it is dried for example in an oven at 105°C until reaching a constant weight.4800-10000. A large number of materials such as talc that can be ground in the presence of binders are mentioned in the description and claims.Filtering time: 1.The inventive composite preferably contains, based on the total dry weight of the composite, 5 to 95 wt%, more preferably 20 to 80 wt%, even more preferably 25 to 75 wt% pigment particles and/or filler particles.Additional aspects of the present invention constitute the use possibilities of the composite whether in a solid, moist or dry state or as an aqueous slurry., in coating paper, preferably amounts of the inventive composite of 0.01 wt% to 1 wt%, based on the total dry weight of the composite, preferably in an amount of 0.2 µm (pressure: about 25 mbar, water suction pump; room temperature). In a second reaction, the resulting intermediate is reacted with epichlorohydrin using sulphuric acid and potassium sorbate as the catalyst to yields the end product, diluted with water to a solids content of 12 to 20 wt% and the pH is adjusted to pH 3 with more sulphuric acid. Suitable polyvalent cations include for example divalent cations such as calcium, magnesium, strontium or trivalent cations such as aluminium.7 g binder as an aqueous solution with a solids content of 15., in dry grinding in an amount of about 0. There is only very little segregation.The dispersants and/or grinding aids may be used in an amount of about 0.A method for producing a composite according to any one of claims 1 through 16, comprising the steps:a) providing the pigment and/or filler microparticles;b) providing the composition of dolomite particles in the nanometer range;c) providing the binder;d) adding the pigment and/or filler particles and the dolomite composition from a) and b) to the binder from c);wherein the pigment and/or filler particles are added to the binder before, after or together with the dolomite composition, mixed therewith, and the resulting reaction mixture is homogenized. When segregation occurs, nano-dolomite passes through the pores first but over a period of time a secondary filter cake forms on the membrane filter and blocks the pores.3600-800 0.The water content of the composite slurries obtained by the inventive production process can be reduced, e.The inventive pigment and/or filler particles may also be organic particles, however, e.WO 2006/016036relates to among other things, a method for grinding mineral materials in water in the presence of binders and the resulting suspensions as well as the use thereof in coating formulations.Calcium-magnesium carbonate composite and method for the preparation thereofZA9205701B(en)1991-08-081993-04-13Bst Holdings Pty LtdLightweight concrete. The use of dolomite particles is not mentioned.Filtering time: 0.g.4 to 1.Another object of the present invention is to provide a method for producing such composites, the use of these composites according to the present invention in papermaking and finishing, e.2The Brookfield viscosity of the slurry obtained after production was 1460 mPa·s.g.In a preferred aspect, the equivalent diameter of the pigment and/or filler particles is essentially in a range of more than 0. The layer also includes binders such as polyvinyl alcohol or polyvinylpyrrolidone and the like to bond the hollow spheres together.6 of the above intermediate having a solids content of 89 wt% were added and mixed intensely for 15 minutes at a stirring speed of 2800 rpm. The final temperature after mixing was 48°C.V.3 to 100 µm, in particular from about 1 to about 25 µm.g.1 wt% to 0. The desired segregation has already taken place at this point in time.2 to 1 mg/m2 nanoparticle surface area, e.If the slurry of the dolomite composition is not added until the pigment and/or filler particles have already been pretreated with the binder, this may be accomplished, for example, by means of a tubular mixing apparatus, e.e.03 to 0. The ink-absorbing layer comprises a plurality of hollow spheres, e. The equipment used is available from the company Gebrüder Lödige Maschinenbau , Paderbom, Germany.4 Solids content: 64., at a solids content of 65 to 68 wt%, but also of more than 70 wt%, e.The resulting composite slurry had the following characteristics:Brookfield viscosity measured after 5 min/60 min/120 min: 229/224/236 mPa·s pH 9.Inorganic pigment and/or filler particles based on talc, where about 95 to 98 wt%, e.The resulting composite slurry had the following characteristics:Brookfield viscosity measured after 5 s/60 s/120 s: 244/230/231 mPa·s pH 9. The hollow spheres may also be partially replaced by microporous and/or mesoporous inorganic particles such as calcium carbonate or talc as well as polymer particles that are not hollow and may have a diameter of 0. Heating during the production process, e.US5152835A(en)1991-05-081992-10-06Engelhard CorporationComposite titania-calcined kaolin opacifying pigments and method for making and using sameUS5230734A(en)*1991-07-291993-07-27Okutama Kogyo Co.O. Examples1.1 wt% (determined at 120°C, 2 hours in an oven)Organic microparticles 2: Ropaque® AF-1353 slurry (RohmHaas):Particle size: 1. Calcium carbonate, however, is not acid-resistant and decomposes under the influence of acids forming carbon dioxide and calcium salts of the corresponding acid used.g.03 80 1. Comparative experiment 2: Mixture of 25 wt% organic microparticles 1 and 75 wt% nano-dolomite composition 1:750 g based on dry matter of the nano-calcium carbonate composition 1, was mixed with 250 g based on the dry matter of the slurry of organic microparticles 1, in a Pendraulik agitator with a toothed disk with a diameter of 3.7 to about 1.5 to 50 wt%, preferably 1 to 30 wt%, based on the total weight of the paper, and is used in paper finishing, especially in coating paper, preferably in amounts of 0.The composite according to any one of claims 1 through 7,characterised in that the dolomite preferably is ground natural dolomite rock containing at least 50 wt.6 wt%Figure 2 shows clearly that the nano-dolomite is segregated front the organic microparticles., with regard to opacity, whiteness and brightness or printing properties while at the same time being subject to no or essentially no segregation under the processing conditions to which they are exposed and have an improved acid stability in comparison with composites containing materials having a high content of calcium carbonate such as marble, limestone, chalk and precipitated calcium carbonate.-, preferably more than 75 wt% dolomite mineral, more preferably more than 90 wt%, especially preferably more than 98 wt% dolomite mineral. However, the nanoparticles do not coat the carrier. In the case of hollow spherical particles, they may also contain liquids, e.Likewise, the inventive composites may also be used to reduce the sheen because of their structure. The time required to filter 200 mL was measured. Depending on the choice of property used for comparison, a distinction is made between different equivalent diameters.g.2 µm up to the micrometer range, about 0.3 to about 10 µm, e.g.When using mixtures of such microparticles and nanoparticles in such applications, an unwanted separation of components, so-called segregation, unfortunately occurs frequently and is associated with an uneven distribution of the coating with regard to the coating thickness on the surface underneath, the underlying pre-coating or the paper surface, which may thus lead to an uneven printing on the paper, for example.Method for manufacturing light-weight shaped concrete articles, such as block-shaped building elementsJPS59120657A(en)1982-12-271984-07-12Lion CorpSurface-coated pigmentFI96695C(en)1988-03-071996-08-12Pluss Stauffer AgPigment blend for paper industryJPH02242998A(en)1989-03-151990-09-27Asada Seifun KkComplex powder for papermaking imparting opacityDE4018162A1(en)1989-06-061990-12-13Pluss Stauffer AgAq.The composite according to any one of claims 1 through 3,characterised in that the pigment and/or filler particles have an essentially spherical structure, preferably a hollow spherical or hollow hemispherical or platelet-like structure.Acid stability in slightly acidic medium:3 samples with 4 g each based on the dry matter of the composite corresponding to 3 g nano-calcium carbonate based on the dry matter, were stored at 23 °C for the time mentioned below each in 100 ml 2.Filtering time: 1.P.4 15. Such a tubular mixing apparatus is available, for example from Y stral , Ballrechten-Dottingen, Germany. The mechanically produced fluidized bed ensures an intense mixing effect even with large batches in a very short period of time.5 to 2 mm in size.g.9 to about 1.The binder is preferably provided in the form of an aqueous slurry, especially preferably as a solution.The grinding may be performed in any of the known grinding equipment with which those skilled in the art are familiar for grinding dolomite. It is especially preferably 85 ± 10 wt%.g. The time required to filter 200 mL was measured.g.3 µm to 1., by filtration so that the composite is obtained as a dry or moist solid, e.5 wt% solids content of the nanoparticle/microparticle mixture and filtering the slurry using a membrane filter with a pore diameter of 0.4 µm yields the 0. a sphere.9 to about 1., 66 ± 2 wt%.US 5,449,402describes functionally modified pigment particles that are produced by mixing, of flocculated pigments such as calcium carbonate with a regulator substance having an opposite charge from the charge of the flocculated pigment., when using certain dispersants.5 to 50 wt%, preferably 1 to 30 wt%, based on the total weight of the paper.7 mg/m2 nanoparticle surface area. The excess calcium ions are reacted with carbon dioxide and precipitated as calcium carbonate on the polymeric calcium salt. This is also especially advantageous in subsequent formation of the composite.29 43., 97 ± 0.Figure 8 shows the SEM of a combination of an inventive inorganic and an inventive organic microparticle/nano-dolomite composite.2 µm (pressure: about 25 mbar, water suction pump; room temperature).The method according to any one of claims 18 through 20,characterised in that after adding the binder to the resulting reaction mixture one or more dispersants , preferably selected from the group consisting of polyacrylic acid salts such as the sodium salt, sodium polyphosphate or polyacrolein/acrylate copolymers; polymeric cationic and/or amphoteric dispersants, especially polydiallyldimethylammonium chloride (PolyDADMAC) or copolymers of acrylic acid with cationic monomers or mixtures of such dispersants, are added., by filter pressing and/or centrifuging and/or thermally, preferably using one or more dispersants., collect primarily in the upper area of the coating, for example, which is important in particular when the coating should absorb a certain volume of liquid such as water, oil and/or organic solvents from the printing ink in the subsequent printing.3The same type of membrane filter was used as for the segregation tests.g.The particle size distribution was measured with the sedimentation method as described above using a Sedigraph 5100 apparatus from the company Micromeritics, USA and printed as a throughput summation curve using an X-Y plotter, where the X axis indicates the particle diameter as the corresponding spherical equivalent diameter and the Y axis indicates the corresponding particle content, in weight percent (see for example P. The samples show no spontaneous release of CO2 and no spontaneous effervescence. The time required to filter 200 mL was measured.5 hours.1 g of the slurry of organic microparticles 2 was stirred during 2 minutes in the Pendraulik stirrer, type LD 50 with toothed disk having a diameter of 3 cm.Aggregated composite mineral pigmentsUS5169441A(en)*1990-12-171992-12-08Hercules IncorporatedCationic dispersion and process for cationizing finely divided particulate matterFR2674515B1(en)1991-03-291993-09-03Talc LuzenacTalky substances having specific surface properties and methods of manufacture.In the following, viscosity measurements always relate to Brookfield viscosity, which is determined in a Brookfield viscometer of EV-2+ type with a disk spindle of 3 and at 100 rpm at room temperature (20 ± 3 °C), unless otherwise indicated.6 wt%Figure 8 shows clearly that the nano-dolomite is neither segregated from the organic nor from the inorganic microparticles and is on the surface of the inorganic and organic microparticles. Those skilled in the art are familiar with this method and this apparatus which are used throughout the world for determining the degree of fineness of fillers and pigments.3 to about 25 µm, most preferably in a range from about 0.g. The inorganic pigment and/or filler microparticles are often preferably used in solid form and the organic pigment and/or filler microparticles are often preferably used as an aqueous slurry.Pigments and/or fillers based on particles in the nanometer range (so-called nanoparticles) such as, fore example, nano-calcium carbonate are known and are used in numerous applications including paper, paint and plastics applications.Recycling of mineral fillers from the residue of a paper deinking plantJPH09132514A(en)1995-11-101997-05-20CatalystsChem Ind Co LtdFlaky fine powder and cosmeticUS5886069A(en)*1995-11-131999-03-23E. should not be impaired significantly. When segregation occurs, nano-calcium carbonate first passes through the pores but over a period of time a secondary filter cake forms on the membrane filter and blocks the pores.However, an aqueous solution or slurry of the binder may also be provided first with the pigment microparticles and/or filler microparticles being added first to the aqueous solution or slurry and then the nano-dolomite composition being added, or with the nano-dolomite composition being added first and the then the pigment microparticles and/or filler microparticles being added, or with the pigment microparticles and/or filler microparticles and the nano-dolomite composition being added simultaneously and then homogenized.5 g water. The molecular weight of the grinding aids and/or dispersants is selected so that they act as parting agents rather than as binders.3 to 2 µm, preferably 0.7 25.Use of a composite according to any one of claims 1 through 16 or a slurry according to claim 24 as a filtration aid in the form of a filter layer, optionally on a natural and/or synthetic carrier material such as cotton, cellulose and polyamide fibres.3 to 75 µm, more preferably in a range from 0.4 wt% sodium polyacrylate with a Mw of about 35000 to 400000 g/mol, based on the total dry weight of the nano dolomite as dispersant/grinding aid, at a solids content of 65.Description of the figures:The figures described below are scanning electron micrographs (SEM) of the various mixtures of the state of the art and inventive composites. The advantage of hollow spheres lies in the lower specific gravity in comparison with filled spheres, among other things.Especially in dry grinding, the grinding agents and/or dispersants used may also be selected from the group comprising glycols, polyglycols, e.g. Combinations of mechanical and thermal concentration steps are especially preferred.8 g binder as an aqueous solution with a solids content of 15. The resulting reaction mixture was sheared for 1 minutes, whereby after half of the shearing time, the pH was adjusted to 9 with 10 wt% NaOH and dispersed with 0.5 wt% solids content of the nanoparticle/microparticle mixture and filtering the slurry using a membrane fiber with a pore diameter of 0.2 and 0.It is a further object of the invention to provide a filtering aid, which can be used for slightly acidic liquids, in the form of a single filter layer or applied in and/or on fibres as a filtering aid supporting the actual fibre material. After filtering the filter residue was dried at 105 °C for 3 h.The composite according to any one of claims 1 through 14,characterised in that it contains 0.5 wt%, but also more than 50 wt% of the dolomite component is still present. Suitable talc qualities are distributed by MONDO Minerals, for example.The resulting mixture had the following characteristics:Brookfield viscosity measured after 5 s/60 s/120 s: 145/150/165 mPa·s pH 9.Screen fraction after hammer mill Wt%5 mm 21 - 5 mm 20500 µm - 1 mm 2145 - 500 µm 4845 µm 9The fraction of 45 - 500 µm had the following mineralogical composition (XRD):95 wt% dolomiteabout 1.The composite according to claim 5,characterised in that the pigment particles and/or filler particles are talc particles, whereby 95 to 98 wt%, especially 96 wt% of the talc particles have a spherical equivalent diameter of less than 10 µm, 79 to 82 wt%, especially 80 wt% have a spherical equivalent diameter of less than 5 µm and 43 to 46 wt%, especially 45 wt% have a spherical equivalent diameter of less than 2 µm.5 µm, e. a condensation reaction / cross-linking reaction lasting in the range of 1 to 60 min. A few drops (approximately 100 mg) were diluted in 250 mL distilled water and filtered through 0.95 wt% sodium/magnesium polyacrylate with a Mw of about 6000 g/mol, based on the total dry weight of the nano-calcium carbonate as dispersant/grinding aid, at a solids content of 75 wt% to yield the following size distribution:Diameter (nm) Number (N) of particles in N% Wt%200 97.Filtering time: 14 hours.4 µm, in particular from about 0.3 to 100 µm, preferably in a range from 0.The use of EAA copolymers or their salts results in a partial to complete hydrophobisation of the pores of the substrate, e.A filter test was performed to illustrate the segregation tendency by preparing 200 mL of a slurry with 0., with a spray dryer or a microwave or in an oven or mechanically, e. The goal is on the one hand to avoid the impairment of the liquid to be filtered and on the other hand to allow for a fast, efficient filtration.To control and regulate the molecular weight, i.A filter test was performed to illustrate the segregation tendency and to determine the filtration speed by preparing 200 mL of a slurry with 0.4 17. Dolomite mineral contains at least 30 wt% MgCO3, preferably more than 35 wt%, more than 40 wt%, ideally 45 to 46 wt% MgCO3.The grinding aids and/or dispersants support the grinding of the dolomite particles down to the nano range by reducing the viscosity of the slurry and thereby increasing the mobility and free path length of the particles to be ground and the grinding beads.Figure 7 shows the SEM of an inventive composite of inorganic microparticles, nano-dolomite and a binder. Claims (33)A composite, comprisinginorganic and/or organic pigment and/or filler particles coated at least partially with a composition comprising dolomite particles, and a binder,characterised in that- the spherical equivalent diameter of the pigment and/or filler particles is in the micrometer range and the spherical equivalent diameter of the dolomite particles is in the nanometer range; and- the binder is a copolymer comprising as monomers one or more dicarboxylic acids and one or more monomers from the group of diamines, triamines, dialkanolamines or trialkanolamines.5 cm as the stirrer and a stirrer speed of 7500 rpm at a starting temperature of 22°C for 15 minutes while stirrmg.01 wt% to 10 wt%, based on the total dry weight of the composite, preferably 0. acetic acid as a condensation product.The composite according to any one of claims 1 through 10,characterised in that the pigment particles and/or filler particles and the dolomite are present in a ratio of preferably 1:20 to 20:1, especially in a ratio of 1:4 to 4:1, more preferably in a ratio of 1:3 to 3:1 or 1:2 to 2:1, especially in a ratio of 1:1 or 1:3, based on dry weight. It does not play any role with regard to the binding of the different components within the layer.0Such products can be produced by two-step synthesis in the manner familiar to those skilled in the art for organic synthesis.6200-400 1. The mixtures and the inventive composites were adjusted to a concentration of 20 wt% in water using an ultraturax (rotor-stator-mixer).50 1.6400-600 0. The solids content was diluted with water to a concentration of 50 wt%; 40.g., Ltd.Use of a copolymer as defined in claim 1 for at least partial coating of inorganic and/or organic pigment and/or filler particles as defined in claim 1 with a composition comprising dolomite particles as defined in claim 1.1800-1000., by pumping the slurry with the help of a centrifugal pump through the tubular mixing apparatus and continuously introducing the slurry of pretreated pigment and/or filler particles into the tubular mixing apparatus through an intake tube.65 1.They should be stable at least in weak acids having a pKa of4 such as, e.g.The composite according to any one of claims 1 through 11,characterised in that saturated or unsaturated, branched or unbranched C2 to C10 dicarboxylic acids, preferably C3 to C9 dicarboxylic acids, C4 to C8 dicarboxylic acids, C5 to C7 dicarboxylic acids, especially adipic acid are used as the dicarboxylic acid monomers of the binder, and/or linear and branched chain, substituted and unsubstituted diamines and triamines, especially N-(2-aminoethyl)-1,2-ethanediamine, are used as the diamine, triamine monomers of the binder, and diethanolamine, N-alkyldialkanolamines such as N-methyl- and N-ethyldiethanolamine and triethanolamine are used as the dialkanolamine or trialkanolamine monomers of the binder., 15 to 30 wt%.2 µm (pressure: about 25 mbar, water suction pump; room temperature).2 µm (pressure: about 25 mbar, water suction pump; room temperature).However, under the conditions of papermaking or coating, such mixtures are usually subject to segregation because the bonds between the components of the mixture often do not withstand these conditions.This experiment clearly shows that the nano-dolomite composites with inorganic micropigment have a very high acid resistance and even after long storage times in acidic media for several days still have a significantly higher acid stability than comparable nano-calcium carbonate composites.g.The inventive binder has especially good binder properties in combination with the microparticles and the composition. The term "sheen" is understood to refer to a gloss formed when a surface is observed at a very shallow angle; this often has a very irritating effect on the observer.10 70.3 to 12 µm, wherein the spherical equivalent diameter of the organic pigment particles and/or filler particles preferably is in a range of more than 0.The use of the inventive composites as filtration aids, also for weakly acidic media, on the one hand avoids and/or reduces a too strong impairment of the liquid to be filtered by decomposing components of the filtering aid material, and, on the other hand, allows for a fast and efficient filtration.Solids content: 61.g. When segregation occurs, nano- calcium carbonate passes through the pores first but over a period of time a secondary filter cake forms on the membrane filter and blocks the pores.12 12 2.Another aspect of the present invention relates to a coating colour comprising an inventive composite. No permeable secondary filter bed was formed., in coating paper. Inorganic microparticles with inorganic nanoparticlesComparative experiment 6: Mixture of 25 wt% inorganic microparticles 1 and 75 wt% nano-dolomite composition 1:750 g based on dry matter of the nano-calcium carbonate composition 1, was mixed with 250 g based on the dry matter of the slurry of inorganic microparticles 1, in a Pendraulik agitator with a toothed disk with a diameter of 3. The time to filter 200 mL was measured.4 µmThe particle size was determined by SEM. The resulting reaction mixture was sheared for 15 minutes, whereby after half of the shearing time, the pH was adjusted to 9 with 10 wt% NaOH and dispersed with 0. It is distinguished therefrom, as being treated with cold acid dolomite shows almost no reaction, while limestone decomposes effervescently (formation of CO2).g., talc, mica or mixtures thereof.g.9By dividing the particle weight, the number of particles can be calculated from the weight of the respective fraction and then used to calculate the percentage distribution in N%.An aqueous slurry,characterised in that it comprises a composite according to any one of the claims 1 through 16.29 1.3600-800 0.The composite according to claim 1,characterised in that the inorganic pigment and/or filler particles are selected from the group comprising talc, mica or mixtures thereof.2 µm (pressure: about 25 mbar, water suction pump; room temperature).Figure 4 shows the SEM of an inventive composite of organic microparticles, nano-dolomite and a binder. Calcium ions are added in excess to the slurry to induce precipitation of the calcium salt of the polymer on the mineral flocks and therefore produce aggregates of the mineral particles that are bonded by the calcium salt and have a porous flaky structure.5)., 0. I.In a preferred aspect, the pigment microparticles and/or filler microparticles are inorganic particles, e.03 1.The present invention relates to composites, comprising inorganic and/or organic pigments and/or fillers in the form of microparticles whose surface is coated with the help of binders at least partially with finely divided dolomite particles in the nanometer range, a method for producing such composites, aqueous slurries thereof and use thereof in papermaking or in the field of production of paints and plastics as well as the use of the inventive binders for coating the microparticles with nano-dolomite.g.Figure 6 shows the SEM of a mixture of inorganic microparticles and nano-dolomite.Due to the hollow spherical structure of the organic micropigments and/or fillers such as polystyrene hollow beads and the surface properties of dolomite, the inventive composite also allows the use of a "light dolomite" in plastics and paints, for example, which may be advantageous in aeronautical engineering, for example., particle size, it may be ground in one or more wet or dry grinding steps, preferably several grinding steps, e.3 µm value (300 nm), etc.70 0. Especially conventional attritor mills such as those distributed by the company Dynomill are suitable for wet grinding. The binder is not used to produce a composite but instead as a grinding aid for finer grinding, but the average diameter of the particles in the pigment suspensions may be up to 30 µm.DE 10 2006 026 965describes composites comprising inorganic and/or organic pigments and/or fillers in the form of microparticles, the surface of which is coated at least partially with the help of binders with calcium carbonate particles in the nanometer range, a method for the production of such composites, aqueous slurries thereof and their use in the paper production or in the field of paint and plastic production and the use of these binders for coating the microparticles with nano-calcium carbonate.1 6.4200-400 2.e.01 wt% to 5 wt%, based on the total dry weight of the composite, e., from calcium carbonate, talc or polystyrene and use thereof.Inorganic microparticle pigments and/or fillers are preferably platelet-like.e.Dolomite according to the present invention means dolomite rock. Thus, the method described inWO 2006/016036obligatorily includes a grinding step which yields particles essentially in the micro range and it does not describe a binder that allows the formation of an essentially segregation-resistant composite. Organic and/or inorganic pigments and/or fillers in the micrometer range (so-called microparticles) such as hollow spheres or solid particles based on polystyrene, and inorganic mineral particles such as talc-, mica- or kaolin based pigments and/or filters are also known and are used in the same or similar applications., triethanolamine and triisopropanolamine or a mixture thereof. For example, at least 70 mol% or at least 95 mol% of the carboxylic acid groups are neutralized.5 molar acetic acid.The paper which is coated on one or both sides or is uncoated may be calendered paper as well as uncalandered paper. It is a type of pickling bath which may consist of certain cationic polymers and copolymers containing amino groups and is fed to ensure a better chemical interaction between a dye-based ink and the ink absorbing layer. The dispersant(s) may be added, for example, after addition of the binder to the resulting reaction mixture or before addition of the binder to the pigment and/or filler particles or before the addition of the dolomite composition to the component to which the binder is subsequently added or the component that is mixed in.1 The same type of membrane filter was used as for the segregation tests.4 µm, especially preferably about 0.09 0.g.In view of the excellent binding properties of the inventive binders in the inventive composites, especially with regard to the surprisingly good binding of the nanoparticles of the dolomite on the microparticle surface, finally another aspect of the present invention involves the use of a copolymer comprising as monomers one or more dicarboxylic acids and one or more monomers from the group of diamines, triamines, dialkanolamines or trialkanolamines for at least partial coating of pigment and/or filler particles with a composition comprising nano-dolomite such as those described above.1 µm.5).50 50.5 molar acetic acid.All of said compositions of the state of the art particularly describe calcium carbonate as one component.g.In comparison with known composites containing materials with a high content of calcium carbonate such as marble, limestone and chalk, the inventive composite has a significantly improved acid stability.Acid stability in slightly acidic medium:3 samples with 4 g each based on the dry matter of the composite corresponding to 3 g nano-dolomite based on the dry matter, were stored at 23 °C for the time mentioned below each in 100 ml 2.g.g.01 to 0. The Pendraulik stirrer was equipped with a toothed disk having a diameter of 8 cm and the stirring speed was 7500 rpm., 35000 to 45000 g/mol is especially preferred. Only a small portion of the 75 wt% nano-dolomite can be seen in the SEM. There is only very little segregation.Figure 1 shows an SEM of a mixture of organic microparticles and nano-calcium carbonate without a binder.5 to 2 mm.g.70 23.e.g.g.5 wt%, especially 0. The particle diameter of the pigments and/or fillers used does not play a role here inasmuch as no diameter is mentioned explicitly and/or all the particle diameters mentioned in the examples are less than 1 µm in the best case.

Lower impact energies created by a rotational speed of 150 rpm have relatively low KP values (between −0.Figure 7 demonstrates the dominance of cold welding processes which is visible by negative KP values after 1 h of milling in the experiments performed at 200 rpm. In the initial process, k did not vary significantly in most of the experiments, which can be seen by the slight slope of the lines.131 and 0. An exception is given in case of the steel processed Mo-9Si-8B alloy. This alloy shows significant particle growth.084), which indicate that neither the comminution nor the welding process are working significantly. This effect might be explained by a smaller particle size of the initial Mo-9Si-8B powders in comparison to the V-9Si-13B powders, as the reactive surface of the powders is higher and welding processes are more pronounced. The slope of the graphs in Figure 7 is determined as the grindability k (Table 3).

This is all about the 30 tonne per hour grinding mill,if you want to know more detail ,you can send your need to our email: ,or you can have a chat online!

The Equipment Used in the Production Line

Our products have been exported to over 160 countries in Africa, Asia, South America, Europe, etc.We are here to prodvide better products and service for you.

Copyright © 2012-2020 China SKM Machinery Inc. All Rights Reserved.