Patent ID: 8263700

Claim:
A pigment dispersion comprising: (a) a pigment; (b) an acid functional, hydroxyl functional and secondary amine functional acrylic polymer having a weight average molecular weight of at least 11,000; and (c) a liquid carrier comprising an organic solvents, wherein the acrylic polymer is a polymerization product of a mixture of monomers comprising: (i) an alkyl (meth)acrylate having from 3 to 8 carbon atoms in the alkyl group; (ii) a monomer selected from a styrene, methyl (meth)acrylate, and ethyl (meth)acrylate, or a mixture thereof; (iii) 0.1 to 5 percent by weight of an ethylenically unsaturated carboxylic acid; (iv) a hydroxyl-functional ethylenically unsaturated monomer; and (v) 0.1 to 5 percent by weight of a secondary amine-functional ethylenically unsaturated monomer, wherein the weight percents are based on the total weight of monomers used to make the acrylic polymer.