Patent ID: 7060760

Claim:
A silane-terminated polydiorganosiloxane-urethane copolymer of the formula 1, wherein R is a monovalent hydrocarbon radical optionally substituted by fluorine or chlorine and having 1 to 20 carbon atoms, X is an alkylene radical having 1 to 20 carbon atoms in which non-adjacent methylene units are optionally replaced by —O—, A is an oxygen atom or an amino group —NR′—, R′ is hydrogen or an alkyl radical having 1 to 10 carbon atoms, Y is a hydrocarbon radical optionally substituted by fluorine or chlorine and having 1 to 20 carbon atoms, D is an alkylene radical optionally substituted by fluorine, chlorine, C 1 –C 6 -alkyl or C 1 –C 6 -alkyl ester and having 1 to 700 carbon atoms, in which non-adjacent methylene units are optionally replaced by —O—, —COO—, —OCO—, or —OCOO—, B is a radical of the formula 2 -Z-Si(R 1 ) m (R″) 3-m , (2), wherein Z is an alkylene radical having 1 to 10 carbon atoms, R 1 is a monovalent hydrocarbon radical optionally substituted by fluorine or chlorine and having 1 to 12 carbon atoms, 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, and C 1 –C 6 -alkyloximo radicals, W is a radical B or hydrogen, m is 0, 1 or 2, n is an integer from 1 to 2000, a is an integer of at least 1, b is 0 or an integer from 1 to 2000, c is an integer from 1 to 30, and d is 0 or 1, with the proviso that, based on the sum of urethane groups and urea groups, at least 30 mol % of urethane groups are present.