| abstract |
The present invention relates to a powder coating composition for curing at a low temperature of 100°C to 150°C. The powder coating composition comprises a) a carboxylic acid functional resin A, which is a polyester resin A having a carboxylic acid group, b) a first glycidyl functional resin B1, which is a bisphenol A-based epoxy resin having a glycidyl group, c) a glycidyl group a second glycidyl functional resin B2, which is a phenol or cresol epoxy novolac resin having a cydyl group, and d)nat least one thermosetting curing catalyst C. Such powder coating compositions can exhibit excellent combinations of properties upon curing, such as smoothness, flexibility, rigidity, and above all, excellent durability for MEK impregnation testing. |