Patent ID: 7153924

Claim:
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) (HO)(R 2 SiO) n-1 H (3) and at least one diisocyanate of the formula (4) OCN—Y—NCO (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 1-20 hydrocarbon radical optionally substituted by one or more of fluorine or chlorine, X is a C 1-20 alkylene radical in which nonadjacent methylene units are optionally replaced by —O—, or is a C 6-22 arylene radical, 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 1-10 alkyl radical, or a C 6-22 aryl radical, Y is a divalent C 1-20 hydrocarbon radical optionally substituted by one or more of fluorine or chlorine, W is hydrogen, a substituted hydrocarbon radical, or a radical R 2 Si—X—NH 2 , D is a C 1-700 alkylene radical optionally substituted by one or more of fluorine, chlorine, C 1 –C 6 -alkyl or C 1 –C 6 -alkyl ester in which nonadjacent methylene units of said alkylene radical are optionally replaced by —O—, —COO—, —OCO—, or —OCOO— groups, or is a C 6-22 arylene radical, 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.