Patent ID: 8829146

Claim:
A polyurethane composition comprising: A) 5% to 99% by weight of the composition, a polyurethane compound which comprises a uretdione group, wherein the polyurethane compound A) consists of a reaction product of at least one of an aliphatic polyisocyanate comprising a uretidione group, a (cyclo)aliphatic polyisocyanate comprising a uretidione group, and a cycloaliphatic polyisocyanate comprising a uretidione group with at least one of a dialcohol, trialcohol and tetraalcohol, a free NCO content of the polyurethane compound A) is less than 5% by weight, and a uretdione content of the polyurethane compound A) is 2% to 25% by weight, and B) 0.2% to 5% by weight of the composition of at least one catalyst selected from the group consisting of a quaternary ammonium acetylacetonate and a phosphonium acetylacetonate.