Patent ID: 7056974

Claim:
A powder coating material comprising powder coating resins which are solid at 20° C. and copolymers containing units of the following monomers: a) olefinically unsaturated monomers having from 5 to 40 carbon atoms, with at least one hydroxyl group and at least one free-radically polymerizable C═C double bond, b) alkyl esters of monoolefinically unsaturated monocarboxylic acids or dialkyl esters of olefinically unsaturated dicarboxylic acids or mixtures thereof, the alkyl radicals having from 1 to 18 carbon atoms and the carboxylic acids from 3 to 12 carbon atoms, c) (per)fluoroalkyl esters of the carboxylic acids stated under b, the (per)fluoroalkyl group having from 2 to 20 carbon atoms obtained by melting and homogenising the mixture of the said powder coating resins with the said copolymers at a temperature below the curing temperature of the said mixture of from about 110° C. to about 140° C.