Patent ID: 8084566
Filing Date: 2011-12-27
Classification: B01D,C08G,C08L,C11D

Abstract:
1. A composition comprising (A) polysiloxane copolymers prepared by in a 1st step reacting organopolysiloxanes (1) which have per molecule at least one Si-bonded hydrogen atom, with substantially linear oligomeric or polymeric compounds (2) of the formula where R 1 is a monovalent, optionally substituted hydrocarbon radical, which is hydrosilylatable by Si—H groups in a hydrosilylation reaction, A is a divalent, polar organic radical selected from the group consisting of —O—, —C(O)—O—, —O—C(O)—, —O—C(O)—O—, —C(O)—NH—, —NH—C(O)—, urethane radicals and urea radicals, and mixtures thereof, A 1 is a divalent, polar organic radical selected from the group consisting of —O—, —NH, NR′—, and mixtures thereof where R′ is a monovalent hydrocarbon radical having 1 to 18 carbon atoms, n is an integer from 1 to 20, and m is an integer, with the proviso that the m units (A-C n H 2n ) are identical or different, to form intermediates (4) containing H-A 1 groups, and in a 2nd step reacting the resultant intermediates (4) containing H-A 1 groups, with organic compounds (5) which have per molecule at least two isocyanate groups, and also, optionally, with further compounds (7) which are reactive with isocyanate groups, (B) organopolysiloxane resins comprising units of the formula in which R 8 are identical or different, and are hydrogen or a monovalent SiC-bonded hydrocarbon radical, R 9 are identical or different and are hydrogen or a monovalent, optionally substituted hydrocarbon radical, g is 0, 1, 2 or 3, and h is 0, 1, 2 or 3, with the proviso that the sum g+h≦3 and in less than 50% of all of the units of the formula (VI) in the organopolysiloxane resin the sum g+h is 2, with the proviso that the composition does not contain polyorganosiloxanes in which more than 90% of the units are difunctional units of the formula formula SiR′ 2 O 2/2 where R′ is a hydrocarbon radical.