PAINT COMPOSITION BASED ON POLYAMIDE POWDER FOR COATING PVC PROFILES, OYING PROCESS AND THIS WAY COATED PVC PROFILES

摘要

FIELD OF THE INVENTION The present invention relates to a composition for coating PVC profiles, characterized in that it comprises the following components: a) 20 to 99.5% by weight based on the dry coating of a binder which is a mixture of two resins A1 and A2: hydroxyl resin A1 and / or carboxyl-containing resin, preferably polyacrylate, epoxy, polyether, polyester or caprolactone, chlorinated vinyl resin containing A2 hydroxyl and / or carboxyl groups; the average molecular weight of the resins A1 and A2 is between 350 and 35,000; b) a crosslinking agent, which is preferably an aromatic, aliphatic or cycloaliphatic isocyanate or polyisocyanate or epoxide acrylate; the molar ratio of the reactive groups of the crosslinking agent to the reactive groups of one or more polymers having hydroxyl and / or carboxyl groups is between 0.6 and 1.5, preferably between 0.7 and 1.3, c) 0.5 to 80% by weight based on the dry coating - a thermoplastic resin, preferably a polyamide having a softening point of 110 to 230 ° C, d) an organic solvent having a boiling point of 40 to 310 ° C, since it does not contain silicone oil. The composition relates to such PVC coating for making windows, shutters and doors, the invention relates to such coating process and the resulting PVC profiles. ŕ