Polystyrene modified with a telechelic polyorganosiloxane

Details Polystyrene modified with a telechelic polyorganosiloxane Polystyrene modified with a telechelic polyorganosiloxane

C - Chemistry, Metallurgy

08

G

C08G 77/42 (2006.01) C08F 290/06 (2006.01) C08G 77/20 (2006.01) C08L 83/10 (2006.01)

Patent

CA 2152764

A crumb-like silicone rubber powder is uniformly dispersed in a polystyrene polymer using conventional equipment, such as a twin screw extruder, to provide a resin having a ten fold improvement in impact strength over the unmodified polymer. The silicone rubber powder is prepared by isolating the particles obtained from a polymerization of an unsaturated monomer in the presence of an aqueous emulsion of a unsaturated telechelic polydiorganosiloxane which has been prepared using an organotin curing catalyst and a dihydrolyzable grafting silane.

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