Patent ID: 6136896
Filing Date: 2000-10-24
Classification: C08F

Abstract:
A graft copolymer comprising a backbone and at least two polymeric side chains, the graft copolymer formed from the copolymerization of randomly repeating ethylenically unsaturated monomer units, acryloxyalkyl-functional polydiorganosiloxane macromonomer units, and acryl-terminated, carboxyl-functional polybutylene macromonomer units, wherein the copolymer comprises:(A) at least one ethylenically unsaturated monomer;(B) at least one acryl-terminated, carboxyl-functional polybutylene macromonomer having its formula selected from the group consisting of ##STR19## (iii) a mixture of (i) and (ii), ##STR20## (vi) a mixture of (iv) and (v), ##STR21## (x) a mixture of (viii) and (ix), ##STR22## (xiii) a mixture of (xi) and (xii), ##STR23## (xvi) a mixture of (xiv) and (xv), ##STR24## (xix) a mixture of (xvii) and (xviii) wherein Z represents a polybutylene chain, G is independently an alkylene group having 2 to 10carbon atoms, G' is independently an alkylene group having from 1 to 10 carbon atoms, L is independently selected from the group consisting of hydrogen and an alkyl group having from 1 to 18 carbon atoms, R.sup.2 is selected from the group consisting of methyl, ethyl, and propyl, and R.sup.1 is independently an alkyl radical having from 1 to 6 carbon atoms; and(C) at least one acryloxyalkyl-functional polydiorganosiloxane macromonomer, wherein the ethylenically unsaturated monomer units, in conjunction with the copolymerizable moieties of the acryloxyalkyl-functional polydiorganosiloxane macromonomer units and the acryl-terminated, carboxyl-functional polybutylene macromonomer units, form the backbone, and wherein the polymeric portion of the acryloxyalkyl-functional polydiorganosiloxane macromonomer units form at least one side chain and the polymeric portion of the acryl-terminated, carboxyl-functional polybutylene macromonomer units form at least one side chain.