Patent ID: 6843933

Claim:
Organic polyisocyanates having at least two isocyanate groups, wherein isocyanate groups have been blocked with CH-acidic cyclic ketones of the general formula (I) in which X represents an electron-withdrawing group, R 1 and R 2 independently of one another represent the radicals H, C 1 -C 20 -(cyclo)alkyl, C 6 -C 24 -aryl, C 1 -C 20 -(cyclo)alkyl ester or C 1 -C 20 -(cyclo)alkyl amide, C 6 -C 24 -aryl ester or C 6 -C 24 -aryl amide, mixed aliphatic/aromatic radicals having 1 to 24 carbon atoms, wherein R 1 and R 2 may also be part of a 4 to 8-membered ring, n is an integer from 0 to 5, and wherein the organic polyisocyanates have an overall blocked isocyanate group content (calculated as NCO) of from 25 to 0.1% by weight.