Patent ID: 7026425

Claim:
A moisture-crosslinkable composition comprising (A) 100 parts by weight of at least one silane-terminated polydiorganosiloxane-urea/urethane copolymer of the general formula 1 in which R is a monovalent C 1-20 hydrocarbon radical optionally substituted by fluoro or chloro, X is a C 1-20 alkylene radical in which nonadjacent methylene units are optionally replaced by —O—, A is an oxygen atom or an amino group —NR′—, R′ is hydrogen or a C 1-10 alkyl radical, Y is a C 1-20 hydrocarbon radical optionally substituted by fluoro or chloro, D is a C 1-700 alkylene radical in which nonadjacent methylene units are optionally replaced by —O—, —COO—, —OCO—, or —OCOO— groups, said alkylene radical optionally substituted by fluoro, chloro, C 1 –C 6 alkyl or C 1 –C 6 alkyl ester, B is a radical of the formula 2 -Z-Si(R 1 ) m (R″) 3-m (2) Z is a methylene radical, R 1 is a monovalent C 1-12 hydrocarbon radical optionally substituted by fluoro or chloro, R″ is a moisture-reactive radical selected from the group consisting of C 1 –C 4 alkoxy, C 1 –C 20 acyl, C 1 –C 6 alkylaminooxy, C 1 –C 6 alkyloximo, and mixtures thereof, W is a radical B or hydrogen, m is 0, 1 or 2, n is an integer from 1 to 300, a is an integer which is at least 1, b is 0 or an integer from 1 to 30, c is an integer from 1 to 30, and d is 0 or 1, with the proviso that the composition of the units is chosen such that the copolymer possesses a melting point in the range of 30° C. to 200° C., and (B) from 0.1 to 20 parts by weight of at least one silane of the formula 3 Ω-(CH 2 ) e —Si(R 2 ) 3-f (CH 3 ) f (3) where Ω is a moiety selected from the group consisting of —NHR 3 , —NR 3 —(CH 2 ) g —NHR 3 , acryloyl, methacryloyl, OCN, —SH, glycidyloxy, and chloro, R 3 is hydrogen or an optionally halogen-substituted C 1-18 hydrocarbon radical, R 2 independently are methoxy or ethoxy group, e is 1 or 3, f is 0 or 1, and g is from 1 to 10.