Patent ID: 7196134

Claim:
Binder compositions comprising A) one or more hydroxy-functional polyacrylate resins, B) one or more ε-caprolactone-based polyols having an average hydroxy functionality ≧2 and a number-average molecular weight of from 119 to 2000 g/mol, and C) one or more crosslinkers reactive with OH groups and having an average functionality>1, wherein the polyacrylate resins of component A) are prepared by copolymerizing: a) 0.4–10 parts by weight of one or more, optionally functional, polybutadienes having a number-average molecular weight of from 500 to 10 000 g/mol and containing at least 10 mol % of 1,2-pendant vinylic double bonds, based on all of the vinylic double bonds present in the polybutadiene, b) 1–30 parts by weight of one or more unsaturated aromatic monomers selected from the group consisting of styrene, α-methylstyrene and vinyltoluene, c) 30–80 parts by weight of one or more hydroxyalkyl esters of acrylic or methacrylic acid having primary hydroxyl groups, d) 0–30 parts by weight of one or more cycloaliphatic esters of acrylic or methacrylic acid and C 3 to C 12 monoalcohols, e) 10–60 parts by weight of one or more aliphatic esters of acrylic or methacrylic acid and C 1 to C 8 monoalcohols, f) 0.1–5 parts by weight of one or more α,β-unsaturated C 3 –C 7 monocarboxylic or dicarboxylic acids or of one or more monoesters of maleic acid or fumaric acid and C 1 to C 14 monoalchols, and g) 0–30 parts by weight of other copolymerizible compounds different from the compounds of components a)–f), the sum of the parts by weight of components a) to g) being in each case 100.