Patent ID: 6827875
Filing Date: 2004-12-07
Classification: C08G,C09D,Y10T

Abstract:
A blocked organic polyisocyanate having at least two isocyanate groups, which are blocked with an acidic CH cyclic ketone formula (I), whereinX is an electron-attracting group, R1 and R2, independently of each other, represent the radicals H, a C1-C20 (cyclo)alkyl, a C6-C24 aryl, a C1-C20 (cyclo)alkyl ester or amide, a C6-C24 aryl ester or amide, or a mixed aliphatic/aromatic radical having 1 to 24 carbon atoms, which can also form part of a 4 to 8-membered ring, n is an integer from 0 to 5, and which have a content of blocked isocyanate groups (calculated as NCO) present in an amount of up to 20% by weight in total.