Patent ID: 7321019
Filing Date: 2008-01-22
Classification: C08G,C09D

Abstract:
1. A process for the preparation of an aqueous dispersion containing organopolysiloxane/polyurea copolymers of the formula in which (A) is a radical of the formula and (B) a radical of the formula in which X are identical or different C Y are identical or different C Z are identical or different divalent C D are identical or different and are hydrogen, an optionally substituted hydrocarbon radical, or an —R E are identical or different and are oxygen or an amino group —NR R are identical or different and are a monovalent C R R r is 0 or an integer from 1 to 4000, a is an integer greater than 1 and b is 0 or an integer from 1 to 2000, wherein the individual blocks (A) and (B) are optionally randomly distributed (R 3 -[(A) a -stat-(B) b ]-R 3 ), comprising mixing (a) at least one amino-terminated organopolysiloxane, (b) at least one diisocyanate, (c) water, (d) at least one Brönsted acid, (e) optionally one or more surface-active agents, (f) one or more bases, (g) polyfunctional amines which differ from (a), and (h) optionally one or more polyfunctional isocyanates which differ from (b), and reacting reactive species to form an organopolysiloxane/polyurea polymer.