Patent ID: 6107392
Filing Date: 2000-08-22
Classification: C08F,C09D

Abstract:
A water-based coating composition of a binder, (a) plus (b), formed from graft copolymer (a) and optional crosslinking agent (b), in an aqueous carrier (c) comprising:(a) from 10 to 90 percent, based on the weight of the binder, of a graft copolymer having a weight average molecular weight of 2,000 to 100,000 comprising:(i) 5 to 95 percent by weight of the graft copolymer of a hydrophilic polymer backbone comprising polymerized ethylenically unsaturated monomers of which 2 to 35 percent by weight of the graft copolymer have acid functionality; and(ii) 95 to 5 percent by weight of the graft copolymer of macromonomers attached to said polymer backbone at a single terminal point of each macromonomer, said macromonomers comprising hydrophobic polymerized ethylenically unsaturated monomers containing less than 0.5 weight percent by weight of the graft copolymer acid functionality and having a weight average molecular weight of about 1,000 to 30,000;(b) 0 to 40 weight percent of a crosslinking agent based on the weight of the binder; and(c) from 10 to 90 percent by weight, based on the weight of the composition, of an aqueous carrier comprising at least 50 weight percent water based on the weight of the composition; wherein said acid functionality is at least partially neutralized with an amine or other neutralizing agent to form a stable dispersion or solution in water.