Pulverulent coating substance

摘要

The present invention relates to mixtures which are suitable for use as lacquer powders or as binders for lacquer powders and which are solid and capable of being pulverized at temperatures below about 40 DEG C. and liquid at temperatures above about 150 DEG C., which mixtures comprise (A) AN ISOCYANATE COMPONENT HAVING MASKED ISOCYANATE GROUPS; (B) A POLYHYDROXYL COMPONENT; AND, OPTIONALLY (C) THE CONVENTIONAL AUXILIARY AGENTS AND ADDITIVES; CHARACTERIZED IN THAT THE SUBSTANCE USED AS COMPONENT (A) IS A POLYISOCYANATE HAVING ISOCYANURATE GROUPS AND ISOCYANATE GROUPS WHICH ARE MASKED WITH LACTAMS. The present invention also relates to the use of these mixtures as lacquer powders or as binders for lacquer powders for coating any heat-resistant substrate by the conventional coating methods employed for lacquer powders.