Patent ID: 6616979
Filing Date: 2003-09-09
Classification: C08G,Y10S,Y10T

Abstract:
A method for obtaining a bubble-free and visible haze-free coating on a substrate susceptible to outgassing and/or degradation upon heating, comprising applying a powder coating composition which comprises a film-forming blend of:a) at least one non-crystalline epoxy resin; b) at least 5% by weight and no more than 20% by weight, based on the weight of a) plus b), of at least one crystalline epoxy resin; and, c) a curing agent to facilitate curing of said composition to a thermoset state, on a surface of the substrate, and curing the powder coating on the substrate at temperatures below the substrate outgassing and/or degradation temperature until the coating reaches a thermoset state, wherein the coating film resulting on the substrate is without a visible haze.