Patent ID: 6146703
Filing Date: 2000-11-14
Classification: C08G,C08L,C09D

Abstract:
A method of producing a coating on a substrate, said method comprising:applying on said substrate said coating from a heat-curable composition in an organic solvent, said composition comprising:an anhydride resin having a weight average molecular weight less than about 2000 that contains a central moiety and an average of at least three pendant, terminal, noncyclic anhydride moieties bonded to each central moiety,an oligomer having epoxy functionality of at least 2 and a weight average molecular weight less than about 1500, and0.01 percent to 5 percent by weight based on the weight of said anhydride resin and said oligomer of a surface tension reducing agent for maintaining the surface tension during said application step below about 32 dynes/cm.sup.2 ; andcuring said coating wherein said coating composition includes a functional amount of at least one tertiary amine catalyst sufficient to control the amount of volatiles produced during said cure step at a weight ratio of actual to theoretical solids of above about 95 percent.