Patent ID: 6887964
Filing Date: 2005-05-03
Classification: C08G,C08L,C09D,C09J,Y10S

Abstract:
1. A moisture-curable, alkoxysilane-functional polyether urethane comprising a) 20 to 90% by weight, based on the weight of a) and b), of a polyether urethane containing two or more reactive silane groups and one or more polyether segments, wherein the polyether segments have a number average molecular weight of at least 3000 and a degree of unsaturation of 0.007 milliequivalents/g or less, provided that the sum of the number average molecular weights of all of the polyether segments per molecule averages 6000 to 20,000, and wherein the reactive silane groups are incorporated as the reaction product of an isocyanate group with a compound corresponding to the formula  wherein b) 10 to 80% by weight, based on the weight of a) and b), of a polyether urethane containing one reactive silane group and one or more polyether segments having a number average molecular weight of 1000 to 15,000 and a degree of unsaturation of 0.007 milliequivalents/g or less, wherein the reactive silane groups of component b) are incorporated as the reaction product of an isocyanate group and a compound corresponding to the formula  wherein X is as defined above and  R