Patent ID: 7427648
Filing Date: 2008-09-23
Classification: C08G,D06M

Abstract:
1. A hydrophilic siloxane copolymer prepared by the process of (a) reacting in a first step: organopolysiloxane(s) (1) which have at least one Si-bonded hydrogen atom, with substantially linear oligomeric or polymeric compounds (2) of the formula where R A is a bivalent polar organic radical individually 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, A n is an integer from 1 to 20, and m is zero or a positive integer, to form an -(A-C (b) reacting in a second step: the resulting -(A-C (c) a third step, quaternizing: the amino-group-containing intermediate (7) from step (b), partially or completely, with at least one alkylating agent (8), with the proviso that the water content of the compounds (1) and (2), is lower than 2000 weight ppm, in each case based on the total weight of compounds (1) and (2).