The present invention relates to an aqueous slurry comprising natural ground calcium carbonate which has a percentage P.sub.5 by weight of particles having a diameter of less than 5.0 m of from 98.5% to 90%, a percentage P.sub.2 by weight of particles having a diameter of less than 2.0 m of from 96% to 80%, wherein the ratio of P.sub.2/P.sub.5 is from 0.98 to 0.85, and wherein the slurry has a solids content of more than 78 wt %.

A solventborne pigment dispersion having a volatile organic chemical (VOC) content that is less than 250 g/L for tinting solvent-based surface coatings is formulated using a vegetable oil-derived solvent component that is one or more methyl esters of vegetable oils, an acrylic resin containing at least 60% solids, one or more highly concentrated surfactants containing up to 100% by weight of active constituents and that contains no PMA or free aromatic moieties, and one or more organic pigments or one or more inorganic pigment, or a combination thereof.

Provided is a layered product with high jet-black. A layered product according to the present invention is a layered product (10) including at least a first layer (1) and a second layer (2) that are stacked. A value of L* in a L*a*b* color system defined by JIS Z8729 of the first layer (1) is ten or less. The second layer (2) is formed on the first layer (1) and 0.1 to 1 mass % of carbon nanotubes are contained in a material constituting the second layer (2). In the L*a*b* color system defined by JIS Z8729, when values are measured from a side of a plane of the second layer (2), a value of L* is 2.5 or less, a value of a* is 2.0 or greater and 2.0 or less, and a value of b* is 2.0 or greater and 0.5 or less.

The present invention is related to a polyurethane dispersant and a preparation method thereof. The polyurethane dispersant is terminated by a nitrogen-containing heterocyclic compound during synthesis. The nitrogen-containing heterocyclic compound is prepared by subjecting anhydride and a compound containing a primary amine and a secondary amine or a hydroxyl or mercapto group to dehydration condensation. The condensed product is the nitrogen-containing heterocyclic compound, containing a reactive hydrogen. The structural formula of the compound containing the primary amine and the secondary amine or hydroxyl or mercapto group is shown as follows: ##STR00001##
wherein n=1 to 5, and preferably 2 to 4, R.sup.1 and R.sup.2 are respectively alkyls containing 1 to 8 carbons, R.sup.1 and R.sup.2 are independent of each other or connected by a chemical bond to form one or more saturated or unsaturated 4-member to 8-member rings, and X represents N, O, or S.

The present invention relates to a white or colored cementitious mixture for the manufacture of micro-concrete or normal concrete, mortar or pastes with thermochromatic properties, i.e., changing its color depending on the temperature at which the material is exposed. This color change is reversible after some time of exposure to another level of temperature. This cementitious mixture comprises the following components, in percentage in weight of the components relative to the total weight of the composition: a) 35-80% of white or gray Portland cement; b) 0.1-30% of finely ground limestone filler; c) 0.01-3% of powdered super-plasticizer; d) 0.01-3% of modified polyvinyl resins; e) 0.01-5% of dispersant of vinyl acetate and ethylene copolymers; f) 0.3-15% of encapsulated photochromic copolymers; and also one or more components selected from: g) 1-10% of binding regulator; h) 0.1-4% of zinc stearate; i) 1-20% of metakaolins; j) 5-60% of artificial pozzolans; k) 0.1-15% of inorganic pigments.

The present invention relates to an aqueous slurry comprising natural ground calcium carbonate which has a percentage P.sub.5 by weight of particles having a diameter of less than 5.0 m of from 98.5% to 90%, a percentage P.sub.2 by weight of particles having a diameter of less than 2.0 m of from 96% to 80%, wherein the ratio of P.sub.2/P.sub.5 is from 0.98 to 0.85, and wherein the slurry has a solids content of more than 78 wt %.

A method to prepare a metallic nanoparticle dispersion includes the steps of forming a metallic precursor dispersion or solution by adding a metallic precursor to a dispersion medium including: (a) a solvent according to Formula I, and ##STR00001##
wherein R.sub.1 and R.sub.2 represent an optionally substituted alkyl group, R.sub.1 and R.sub.2 may form a ring, (b) a carboxylic acid according to Formula II,
RCOOH Formula II wherein R is an optionally substituted C2-C7 alkyl, alkenyl or alkynyl group, reducing the metallic precursor with a reducing agent to form metallic nanoparticles, sedimenting the metallic nanoparticles to obtain a highly concentrated metallic nanoparticle dispersion comprising at least 15 wt % of metallic nanoparticles.

Provided is a method for preparing a stable amorphous calcium carbonate (ACC), which can be obtained either in suspension or as a powder. The method comprises stepwise combination of a soluble calcium salt, a soluble carbonate, a first and second stabilizer, and a water miscible organic solvent as described herein. The present invention further relates to stable ACC suspensions and dry powders produced by the method of the present invention.

Disclosed herein is a pigment preparation including at least one organic and/or inorganic pigment and/or filler. The pigment preparation further includes at least one anionic copolymer as dispersant, containing 40 to 95 mol % of structural units of an anionic monomer selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, 2-carboxyethylacrylic acid, maleic acid, mixtures thereof and their respective salts, and further containing 5 to 60 mol % of structural units of a monomer having repeat units of formula (B1)

##STR00001##

where R11, R12 and R13 are, independently, selected from the group consisting of H, methyl and ethyl; R4 is H or an alkyl group having 1 to 4 carbon atoms; X is selected from the group consisting of O, COO, CONH, CH.sub.2O and CH.sub.2CH.sub.2O; Y is an ethylene group; Z is a propylene group, a butylene group or a phenylethylene group; m is an integer from 0 to 100; n is an integer from 1 to 100; and m+n is greater than 5. The pigment preparation also includes at least one nonionic copolymer, containing at least one structural unit having aromatic groups and at least one structural unit having polyethylene glycol groups. The pigment preparation also includes water.

The pigment composition is an inorganic pigment coated with lauroyl lysine, in which a contact angle with respect to water is 95 degrees or greater, and a nitrogen specific surface area ratio between before and after coating is 0.70 or less. Further, the pigment composition of the present invention is an organic pigment coated with lauroyl lysine, in which a contact angle with respect to water is 95 degrees or greater, and a nitrogen specific surface area ratio between before and after coating is 0.90 or less. The cosmetic material, the ink, the coating material, the toner, or the molded article of the present invention contains the pigment composition described above.