Patent ID: 6762241
Filing Date: 2004-07-13
Classification: C08G,Y10T

Abstract:
A polyurethane solution containing alkoxysilane structural units, wherein the polyurethane is the reaction product ofa) at least one at least difunctional polyol having an hydroxyl number of from 8 to 200, b) at least one at least difunctional polyisocyanate having a molecular weight of 140 to 1,500, c) at least one low molecular weight at least difunctional alcohol and/or amine having a molecular weight of 32 to 500, d) at least one compound containing at least one alkoxysilane group and an isocyanate-reactive group, and e) optionally, a monofunctional compound containing an amino, alcohol or oxime group, other than a compound falling within the scope of component d), in the presence of an organic solvent, wherein the equivalents of component d) are at least 50% of the total equivalents of components d) and e) and wherein the number of terminal alkoxysilane groups must be at least 50 wt. % of all the incorporated alkoxysilane groups and wherein the theoretical content of â€”Siâ€”(Oâ€”)3 structural units is less than 1.2 wt. %, based on the total solids content of the polyurethane.