Patent ID: 9587135
Date: 2017-03-07
CPC Classifications: A61K,A61Q,C08F,C08K,C08L,C09C,C09D

Claim:
1. A stable aqueous dispersion comprising composite particles, said composite particles comprising: a pigment particle, said pigment particle having disposed thereon a water-soluble polymer, said water-soluble polymer comprising, as copolymerized units, from 10% to 30%, by weight based on the weight of said water-soluble polymer, ethylenically unsaturated carboxylic acid monomer when said ethylenically unsaturated carboxylic acid monomer has a molecular weight of from 70 to 100; or from 15% to 40%, by weight based on the weight of said water-soluble polymer, ethylenically unsaturated carboxylic acid monomer when said ethylenically unsaturated carboxylic acid monomer has a molecular weight of from greater than 100 to a molecular weight of 500; and from 5% to 95%, by weight based on the weight of said water-soluble polymer, ethylenically unsaturated N-containing monomer selected from the group consisting of: wherein R wherein R wherein R is C 1 -C 4 alkyl and n is 0 to 4; and mixtures thereof; wherein the molar ratio of carboxylic acid to N-functionality is from 0.1 to 4; and from 0% to 50%, by weight based on the weight of said water-soluble polymer, (meth)acrylic ester of a linear or branched monohydroxyl or amide of a monoamine compound having from 1 to 4 carbon atoms; or vinyl ester of a linear, branched, cyclic, or aromatic monocarboxylic acid having from 1 to 9 carbon atoms; and wherein the calculated M said pigment particle bearing said water-soluble polymer having disposed thereon a plurality of water-insoluble polymer particles in an amount of from 5 to 50% by weight, based on the weight of the composite particles.