Power coating of carboxyl-functional acrylic resin and polyepoxy resin

摘要

A powder coating composition for heat-sensitive substrates curable at a temperature of about 300° F. or below for about 30 minutes or less comprises;a) from about 10-90% by weight, relative to a) plus b), of carboxylic acid functional acrylic resin(s);;b) from about 10-90% by weight, relative to a) plus b), of polyepoxy resin(s);;c) a first catalyst functioning as an epoxy homopolymerization catalyst; and;d) a second catalyst functioning as an epoxy/carboxylic acid reaction catalyst.