| abstract |
A urethane polyether with moisture curable alkoxysilane functionality containing a) of 20 to 90% by weight, based on the weight of a) and b) of urethane polyether containing two or more reactive silane groups and one or more polyether segments, where the polyether segments have a number average molecular weight (Mn) of at least 3000 and an unsaturation degree of less than 0.04 milliequivalents / g, and the sum of Mn of all the polyether segments per average molecule of 6000 to 20,000 and the reactive silane groups are incorporated by reacting an isocyanate group with a compound corresponding to the formula H2N-Y-Si- (X) 3 (I) b) of 10 to 80% by weight, of a urethane polyether containing a group reactive silane and one or more polyether segments having an Mn of 1000 to 15,000, where reactive silane groups are incorporated by reacting an isocyanate group with a compound corresponding to the formula (see formula (II)). |