Patent ID: 7153924
Filing Date: 2006-12-26
Classification: C08G

Abstract:
1. Process for preparing organopolysiloxane/polyurea/polyurethane block copolymers of the formula (1): comprising polymerizing in a single stage reaction, at least one compound containing an aminosilane structure of the formula (2): with an organosilicon compound of the formula (3) and at least one diisocyanate of the formula (4) and optionally one or more chain extenders having isocyanate-blocked hydroxyl groups, amine groups, or hydroxyl groups attached to an alkylene residue D where R is a monovalent C X is a C A is an oxygen atom or an amino group —NR′—, Z is an oxygen atom or an amino group —NR′—, R′ is hydrogen, a C Y is a divalent C W is hydrogen, a substituted hydrocarbon radical, or a radical R D is a C B, B′ are, independently, reactive or nonreactive end groups attached covalently to the copolymer, n is a number from 1 to 4000, m is a number form 1 to 4000, a is a number which is at least 1, b is a number from 0 to 40, c is a number from 0 to 30, and d is a number greater than 0.