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Coatings based on branched hydroxyl-containing polyacrylate resins containing cycloaliphatic monomer units and their use in the preparation of multilayer coatings
Coatings based on branched hydroxyl-containing polyacrylate resins containing cycloaliphatic monomer units and their use in the preparation of multilayer coatings
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机译:基于含脂环族单体单元的支链含羟基聚丙烯酸酯树脂的涂料及其在制备多层涂料中的用途
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PCT No. PCT/EP97/03514 Sec. 371 Date Jan. 25, 1999 Sec. 102(e) Date Jan. 25, 1999 PCT Filed Jul. 3, 1997 PCT Pub. No. WO98/04642 PCT Pub. Date Feb. 5, 1998The present invention relates to a coating composition comprising at least one hydroxyl-containing polyacrylate resin as binder component (A) and at least one crosslinking agent (B), component (A) being obtainable by free-radical polymerization of: (a) from 5 to 80% by weight of at least one cycloaliphatic ester of (meth)acrylic acid, (b) from 10 to 50% by weight of at least one hydroxyl-containing alkyl ester of (meth)acrylic acid, (c) from 1 to 25% by weight of at least one monomer having at least two polymerizable, olefinically unsaturated double bonds, (d) from 0 to 25% by weight of at least one further hydroxyl-containing monomer, (e) from 5 to 80% by weight of at least one aliphatic ester of (meth)acrylic acid, (f) from 0 to 40% by weight of at least one vinyl-aromatic compound, and (g) from 0 to 40% by weight of at least one further monomer, the sum of the proportions by weight of all monomers (a) to (g) always being 100% by weight. The invention additionally embraces a process for producing a multicoat paint system using the novel coating composition and the use of the novel coating composition as topcoat, especially in automotive refinishing.
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