Patent ID: 6599973
Filing Date: 2003-07-29
Classification: C08F,C08L,C09D

Abstract:
A composition suitable for use as a pigment dispersant, which comprises a graft copolymer, wherein the graft copolymer has a weight average molecular weight of about 5,000-100,000 and comprises a polymer backbone and discrete anionic and nonionic hydrophilic side chain(s) attached to the backbone wherein(1) the polymer backbone is hydrophobic in comparison to the side chains and contains polymerized ethylenically unsaturated hydrophobic monomers and up to 30% by weight, based on the total weight of the backbone, of polymerized ethylenically unsaturated monomers having functional groups that enhance the pigment binding force; (2) the anionic side chain(s) are hydrophilic macromonomers that are formed from polymerized ethylenically unsaturated monomers and contain 2-100% by weight, based on the total weight of the anionic side chain(s), of polymerized ethylenically unsaturated acid containing monomers; (3) the nonionic side chain(s) are hydrophilic poly(alkylene glycol) containing ethylenically unsaturated macromonomers.