Patent ID: 6855792

Claim:
A cross-linking agent formed from the following starting components: (A) at least one aliphatic and/or cycloaliphatic polyisocyanate compound having ≧2 to 6 NCO function groups, obtained by trimerization, dimerization or formation of, biuret or allophanate, alone or in mixtures, and excluding polyisocyanates obtained from bis(4-isocyanatocyclohexyl)-methane; (B) at least one secondary 3-aminopropyltrialkoxysilane, wherein 1 to 90 mol % of the originally free isocyanate groups of said polyisocyanate have been reacted with said secondary 3-aminopropyltrialkoxysilane; (C) at least one blocking agent, wherein 10 to 99 mol % of the originally free isocyanate groups of said polyisocyanate have been reacted with said blocking agent, and the molar proportions of the reacted isocyanate groups add up to at least 95 mol %.