Patent ID: 7462680

Claim:
Binder compositions comprising A) one or more polyester polyols having an OH number of from 50 to 300 mg KOH/g obtained by reacting a) 40 to 48 mol % of a carboxylic acid component comprising a1) one or more aliphatic, cycloaliphatic, araliphatic or aromatic carboxylic acids with a COOH functionality of ≧2, or anhydrides thereof, and a2) optionally, aromatic, cycloaliphatic, araliphatic and/or aliphatic monocarboxylic acids with b) 52 to 60 mol % of an alcohol component comprising b1) one or more aliphatic, cycloaliphatic or araliphatic polyols with a number-average molecular weight of from 62 to 272 g/mol and an average OH functionality of a ≧2, and b2) optionally, aliphatic, cycloaliphatic and/or araliphatic monoalcohols, B) one or more lactone-based polyols having an average OH functionality of ≧2, C) one or more OH-reactive polyisocyanates which have an NCO functionality of ≧2, contain urethane, uretdione, allophanate, biuret, iminooxadiazinedione and/or isooyanurate groups and are prepared from aliphatic and/or cycloaliphatic diisocyanates and D) optionally solvents, auxiliaries and additives.