Patent ID: 6288198
Filing Date: 2001-09-11
Classification: C08G,Y10T

Abstract:
A hybrid coating composition comprisingA) 5 to 80 wt %, based on the weight of A) and B), of an aliphatic polyisocyanate-aminosilane adduct that is the reaction product ofA1) a polyisocyanate component having an average NCO functionality of 2.5 to 5.5 and an isocyanate content, based on solids, of 9 to 50 wt % and containing aliphatic polyisocyanates withA2) at least 0.7 amino equivalents, based on the NCO equivalents of A1), of an aminosilane corresponding to formula (I)(RO).sub.n Y.sub.3-n Si--CH.sub.2 CH.sub.2 CH.sub.2 --NHZ (I),whereinR represents methyl and/or ethyl,Y represents methyl and/or ethyl,Z represents H.sub.1, C.sub.1 -C.sub.12 alkyl, or CH.sub.2 CH.sub.2 CH.sub.2 --Si(OR).sub.2 Y.sub.3-n andn has a value of 1, 2 or 3 andA3) optionally isocyanate-reactive compounds other than A2),andB) 20 to 95 wt %, based on the weight of A) and B), of at least one hydrolyzable silane corresponding to formula (II)QSi(OX).sub.3 (II),whereinX represents C.sub.1 to C.sub.4 alkyl andQ represents C.sub.1 to C.sub.8 alkyl, phenyl, methoxy, or ethoxy, and/or a hydrolyzate/condensate obtained therefrom.