VERFAHREN ZUR HERSTELLUNG VON UEBERZUEGEN

1. A process for the production of coatings based on reaction products of (A) polyhydroxypolyacrylate resins prepared from esters of acrylic acid and/or methacrylic acid with monofunctional aliphatic alcohols, or from monoesters of acrylic acid and/or methacrylic acid with polyfunctional aliphatic alcohols and other copolymerizable olefinically unsaturated monomers, with (B) polyisocyanates having a functionality of from 2.5 to 6 which contain isocyanurate groups and may or may not be partially or completely blocked with CH-, NH- or OH-acidic blocking agents, wherein there are used, as polyhydroxypolyacrylate resins (A), hydroxyl-containing copolymers produced from (a) 5 to 70% by weight of at least one ester of the general formula see diagramm : EP0075206,P14,F1 where R is hydrogen or methyl, and R' is linear or branched alkylene having 2 to 8 carbon atoms in the main chain, or alkylene containing 5 to 15 carbon atoms and a cycloaliphatic group, (b) 0 to 40% by weight of one or more hydroxyalkyl esters of acrylic acid and/or methacrylic acid, 2 or 3 carbon atoms being present in the main chain of the hydroxyalkyl, (c) 10 to 50% by weight of at least one alkyl ester of acrylic acid and/or methacrylic acid, which forms a homopolymer having a glass transition temperature of from + 5 degrees C to + 120 degrees C, (d) 0 to 20% by weight of a vinyl-aromatic, (e) 10 to 50% by weight of at least one alkyl ester and/or alkyl glycol ester, containing up to 2 ether-oxygen bridges, of acrylic acid and/or methacrylic acid, which esters form homopolymers having a glass transition temperature of from - 80 degrees C to + 4.5 degrees C, (f) 0 to 15% by weight of an acrylamide and/or methacrylamide which may, if desired, bear on the amide nitrogen one or two alkyls having 1 to 8 carbon atoms and optionally containing a carbonyl group, or one of two phenyls as substituents, (g) 0 to 10% by weight of an alpha,beta-monoolefinically unsaturated mono- or dicarboxylic acid of 3 to 5 carbon atoms, or of half-ester of these dicarboxylic acids, (h) 0 to 20% by weight of monomers not specified under (a) to (g) whose polymerized radicals are inert to isocyanate groups, with the proviso that the sum of the percentages indicated under (a) and (b) is 5 to 70, the sum of the percentages indicated under (c) and (d) is 10 to 50, and the sum of the percentages of the components specified under (a) to (h) is 100, and, as polyisocyanates (B) which have a functionality of from 2.5 to 6 and con