POWDER COATING COMPOSITIONS COMPRISING A GLYCIDYL ESTER COPOLYMER AND CARBOXY TERMINATED POLYMERIC SLINKING AGENT

摘要

POWDER COATING COMPOSITIONS COMPRISING A GLYCIDYL ESTER COPOLYMER AND CARBOXYTERMINATED POLYMERIC CROSSLINKING AGENT Powder coating compositions are disclosed which comprise (I) a copolymer of about 5 to about 20 weight percent of a glycidyl ester of a monoethylenically unsaturated carboxylic acid, e.g. glycidyl acrylate and glycidyl methacrylate, about 2 to about 10 weight percent of an alphabeta olefinically unsaturated amide, e.g. acrylamide and methacrylamide, and about 68 to about 93 weight percent of other olefinically unsaturated monomers, and (II) a carboxyterminated polymeric crosslinking agent having molecular weight in the range of about 650 to about 3000, e.g. a carboxyl terminated polyester. Such compositions constitute an improvement over heretofore disclosed coating materials of otherwise similar composition which do not include the amide component of the copolymer.