Patent ID: 8691744
Filing Date: 2014-04-08
Classification: C08G,C08L,D06M

Abstract:
1. Siloxane copolymers preparable by (a) a first step of reacting organopolysiloxanes (1) which have at least one silicon-attached hydrogen atom per molecule with substantially linear oligomeric or polymeric compounds (2) of the general formula where R 1 is a univalent optionally substituted hydrocarbyl radical capable of adding Si—H groups in a hydrosilylation reaction, A is a bivalent 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 radical and urea radical, A n is an integer from 1 to 20, and m is zero or a positive integer, (b) a second step of reacting the resulting H-A and that the compounds (7) are those which can be redetached again from the siloxane copolymer in a temperature range from 50° C. to 250° C., preferably 100° C. to 200° C., resulting once more in free isocyanate groups in the siloxane copolymer, and (c) a third step of the amino-containing intermediates (8) from step (b) being partially or completely quaternized with an alkylating agent (9), with the proviso that the water content of the compounds (1) and (2), which are used for preparing the siloxane copolymers, is lower than 2000 weight ppm, based on the total weight of compounds (1) and (2).