Hybrid coating preparations

摘要

A condensation product of aliphatic aminosilane adducts with hydrolysable silanes is obtained by reaction of: (A) 5-80 wt.% of an adduct from (A1) an aliphatic polyisocyanate (mixture) of mean NCO functionality 2.5-5.5 and isocyanate content 9-50 wt.%, (A2) at least 0.7 aminosilane equivalents of formula (I). A condensation product of aliphatic aminosilane adducts with hydrolysable silanes is obtained by reaction of: (A) 5-80 wt.% of an adduct from (A1) an aliphatic polyisocyanate (mixture) of mean NCO functionality 2.5-5.5 and isocyanate content 9-50 wt.%, (A2) at least 0.7 aminosilane equivalents of formula (I): R = Me, Et; Y = Me, Et; Z = H, 1-12C alkyl, CH2CH2CH2-SI(OR)nY(3-n); n = 1-3 per isocyanate equivalent. (A3) optionally other compounds reactive to isocyanate groups, with (B) 20-95, preferably 30-80 wt.% of at least one silane of formula (II): X = 1-4C alkyl, Q = H, 1-8C alkyl, phenyl, methoxy, ethoxy, 3-glycidyloxy-propyl, 3-aminopropyl, methacryloxypropyl, or hydrolysates/condensates obtainable from these silanes. Independent claims are also included for: (1) a lacquer preparation containing the above condensation product, in which the mean NCO-functionality of the aliphatic polyisocyanate (mixture) (A1) is 3.0-4.5; (2) preparation of the condensation product by reaction as under (A) and (B) above.