Polystyrene modified with a telechelic polyorganosiloxane

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

1994-06-30

1996-03-26

Dean, Ralph H.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525106, 525479, 528 25, 528 34, C08F28312

Patent

active

055021077

ABSTRACT:
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 up to a ten fold improvement in impact strength over the unmodified polymer. The novel silicone rubber powder of the invention 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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