HYBRID COATING COMPOSITIONS

摘要

The present invention relates to hybrid coating compositions containing A) 5 to 80 wt %, based on the weight of A) and B), of an aliphatic polyisocyanate-aminosilane adduct that is the reaction product of A1) 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 with A2) at least 0.7 amino equivalents, based on the NCO equivalents of A1), of an aminosilane corresponding to formula (I) (RO)n Y3-n Si-CH2 CH2 CH2-NHZ (I), wherein R and Y represent methyl and/or ethyl, Z represents H, C1-C12 alkyl, CH2CH2CH2-Si(OR)2Y3-n and n has a value of 1, 2 or 3 and A3) optionally isocyanate-reactive compounds other than A2), and B) 20 to 95 wt %, based on the weight of A) and B), of at least one hydrolyzable silane corresponding to formula (II) QSi(OX)3 (II), wherein X represents C1 to C4 alkyl and Q represents H, C1 to C8 alkyl, phenyl, methoxy, ethoxy, 3-glycidyloxypropyl, 3-aminopropyl and methacryloxypropyl and/or hydrolyzates/condensates obtained from these silanes. The present invention also relates to the use of these coating compositions for coating various substrates, such as paints, plastics, granite, marble, metal, wood, leather and textiles.