| abstract |
The invention relates to compositions (K) containing A) 100 parts by weight of a silane-terminated Polyurethanprepolymers (STPU) containing in its backbone urethane units and units (E), which are selected from polyether and polyester units, wherein the individual polyether or polyester units (E) has a maximum molecular weight of 4000 daltons and having at least one end group of the general formula (1) -L 1 - (CH 2 ) y -SiR 2 3 -x (OR 1 ) x (1), B) 1 to 200 parts by weight of a silane-terminated polyether (STPE) having in its backbone polyester units having an average molecular weight of 5000 to 30,000 daltons and having end groups of the general formula (2) -L 2 - (CH 2 ) m -SiR 4 3 -n (OR 3 ) n (2), C) 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, wherein L 1 , L 2 , R 1 , R 2 , R 3 , R 4 , x, y, m and z have the meanings given in claim 1. The compositions (K) according to the invention are very resistant to tensile shear after curing and are used as adhesives (K). |