Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1994-01-18
1995-08-01
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 34, 528 25, C08L 5100
Patent
active
054380979
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 hydroxyl-functional polydiorganosiloxane which has been precured using an organotin curing catalyst and a crosslinker which contains unsaturated functionality.
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Lee Kenneth M.
Liles Donald T.
Murray David L.
Romenesko David J.
White James W.
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