| 摘要 |
<p>The invention relates to compositions (K) containing A) 100 parts by weight of a silane-terminated polyurethane prepolymer (STPU) whose backbone contains polyurethane units and units (E) selected from among polyether and polyester units, where the individual polyether and polyester units (E) have an average molar mass of not more than 4000 dalton and the at least one end group has the general formula (1) -L1- (CH2)y-SiR2 3-x(OR1)x (1), B) from 1 to 200 parts by weight of a silane-terminated polyether (STPE) whose backbone comprises polyether units having an average molar mass of from 5000 to 30 000 dalton and has end groups of the general formula (2) -L2- (CH2)m-SiR4 3-n(OR3)n (2), C) from 0 to 10 parts by weight of a curing catalyst (HK) which accelerates the curing of the compositions (K) in the presence of atmospheric moisture, where L1, L2, R1, R2, R3, R4, x, y, m and z are as defined in Claim 1. The compositions (K) according to the invention are very resistant to tensile shear after curing and are used as adhesives (K).</p> |
