Low cure powder compositions for heat sensitive substrates

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 comprisesa) 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; andd) a second catalyst functioning as an epoxy/carboxylic acid reaction catalyst.