Patent ID: 6649700
Filing Date: 2003-11-18
Classification: B05D,C08G,C09D

Abstract:
A thermosetting powder coating composition prepared by a wet process, said composition containing a mixture comprising:(a) an epoxy-containing acrylic resin comprising epoxy-containing acrylic resin A and epoxy-containing acrylic resin B, said resins A and B satisfying the properties: (1) (SPA-SPB) is within the range of from 0.2 to 1.5, wherein SPA is the solubility parameter of resin A and SPB is the solubility parameter of resin B; (2) Tg(A)-Tg(B)&gE;10Â° C., wherein Tg(A) is the glass transition temperature of resin A and Tg(B) is the glass transition temperature of resin B; (3) Tg(A) is within the range of from 40 to 100Â° C. and Tg(B) is within the range of from 20 to 50Â° C.; and (4) the weight ratio in solids of resin A to resin B is within the range of from 5:95 to 50:50; (b) a polycarboxylic acid compound curing agent; and (c) fine crosslinked resin particles.