Patent ID: 6344501
Filing Date: 2002-02-05
Classification: C08L,C09D

Abstract:
An aqueous powder clearcoat dispersion comprising a solid pulverulent component A and an aqueous component B, whereinsolid pulverulent component A comprises a transparent powder coating material comprising a) at least one epoxy binder comprising from 25 to 45% by weight, of glycidyl-containing monomers, b) at least one crosslinking agent, and c) optionally one or more additives selected from the group consisting of catalysts, auxiliaries, additives typical for transparent powder coating materials, devolatilizers, leveling agents, UV absorbers, free-radical scavengers, antioxidants, and mixtures thereof, and component B comprises an aqueous dispersion comprising a) at least one nonionic thickener and b) optionally one or more additives selected from the group consisting of catalysts, auxiliaries, efoamers, wetting agents, antioxidants, UV absorbers, free-radical scavengers, biocides, solvent, leveling agents, neutralizing agents, amines, water retention agents, and mixtures thereof, and c) a dispersant medium in the form of a nonionic polyurethane dispersion.