THERMOSETTING, POWDER COATING SYSTEMS

摘要

A thermosetting, powder coating system on the basis of epoxide group-containing amorphous and/or semi- crystalline copolyester. The material contains the following components (A) at least one glycidic ether groups-containing amorphous and/or semi-crystalline copolyester, (B) an aliphatic and/or cycloaliphatic polybasic acid and/or its anhydride and/or a polyol-modified anhydride of a polybasic acid and/or amorphous or semi-crystalline carboxyl- functional copolyester resins and/or carboxyl-functional acrylate resins, (C) if required, fillers and/or pigments and/or additives. The glycidic ether groups-containing amorphous and/or semi-crystalline copolyester has a molecular weight (Mn) of 300 to 10000 and is obtained in that in a first step an amorphous and/or semicrystalline copolyester (D) is produced containing hydroxyl groups, which subsequently is converted in further steps by the reaction with epihaloalkanes into the glycidic ether group-containing copolyester (A).