COATING COMPOSITIONS IN POWDER FORM

摘要

HOECHST AKTIENGESELLSCHAFT - Werk KALLE-ALBERT 91/F 113 16 April 1991 WL-Dr.Ot.-ui Coating compositions in powder form A coating composition in powder form which is composed of (A) a copolymer containing glycidyl groups, (B) an aliphatic or cycloaliphatic dibasic acid, its anhydride or a polyol-modified anhydride of a dibasic acid, (C) optionally, pigments and other additives. The copolymer (A) has a molecular weight (Mn) of 1,000-10,000 and a glass transition temperature of 30-90.degree.C and is a mixed polymer composed of a) at least 10% by weight of glycidyl acrylate or glycidyl methacrylate, b) 5-50% by weight of tert.-butyl acrylate or tert. butyl methacrylate, c) 20-60% by weight of one or more alkyl esters of aliphatic unsaturated monocarboxylic or dicarboxylic acids and d) 0-50% by weight of one or more other olefinically unsaturated monomers.