Powder paint with epoxy and amide copolymer with carboxy terminated crosslinking agent

Claim 1

In a thermosettable powder paint which exclusive of pigments, catalysts, antistatic agents, plasticizers and flow control agents, the same being conventional non-reactive additive to a thermosettable powder paint, consists essentially of a coreactive particulate mixture of (A) a copolymer consisting essentially of about 5 to about 20 weight percent of a glycidyl ester of a monoethylenically unsaturated carboxylic acid and about 80 to about 95 weight percent of other monoethylenically unsaturated monomers, and having a glass transition temperature in the range of about 40° C. to about 90° C. and a molecular weight (M n ) in the range of about 1500 to about 15,000 and (B) as crosslinking agent, a carboxy-terminated compound selected from the group consisting of carboxy-terminated epoxy esters and carboxy-terminated polyesters and having molecular weight in the range of about 650 to about 3000, the improvement wherein said copolymer is qualitatively difunctional and said other monoethylenically unsaturated monomers consist essentially of difunctional monomers selected from the group consisting of acrylamide and methacrylamide in an amount comprising about 2 to about 10 weight percent of said copolymer and monoethylenically unsaturated monomers consisting essentially of monofunctional monomers selected from the group consisting of esters of a C 1 -C 8 monohydric alcohol and acrylic acid, esters of a C 1 -C 8 monohydric alcohol and methacrylic acid and C 8 -C 12 monovinyl hydrocarbons.