Powder clear coating composition

摘要

A powder clear coating composition with a resin solids content comprising at least one epoxy-functional (meth)acrylic copolymer (A) having an epoxy equivalent weight of 250 to 600 and a carboxyl-functional curing component (B) of dodecanedioic acid (B1) and at least one carboxyl-functional urethane component (B2) having a carboxyl number of 80 to 350 mg of KOH/g, wherein the epoxy groups of the epoxy-functional (meth)acrylic copolymer (A) are in a molar ratio to the carboxyl groups of the carboxyl-functional curing component (B) of 2.5:1 to 0.8:1 and wherein 30 to 75% of the carboxyl groups provided by the carboxyl-functional curing component (B) are provided by the dodecanedioic acid (B1) and the remainder to make the total up to 100% by the at least one carboxyl-functional urethane component (B2).