Porous particulate polyvinyl chloride impregnated with alkyl vin

Details Porous particulate polyvinyl chloride impregnated with alkyl vin Porous particulate polyvinyl chloride impregnated with alkyl vin

1982-03-17

1984-08-07

Briggs, Sr., Wilbert J.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524533, 525309, 525311, C08F25904

Patent

active

044645031

ABSTRACT:
A particulate vinyl chloride polymer having excellent processability and heat stability which comprises porous vinyl chloride polymer particles and alkyl vinyl polymers which are included in the porous particles. The particulate polymer is prepared by impregnating an alkyl vinyl compound in porous particles of a vinyl chloride polymer, polymerizing it, and in the course of the polymerization of the alkyl vinyl compound, adding an alkyl methacrylate to the polymerization system and continuing the polymerization. Since the thus obtained polymer has an improved melt-flowability and heat stability, it can be blended with a large quantity of an inorganic filler and can be molded with good processability.

REFERENCES:
patent: 3658943 (1972-04-01), Field et al.
patent: 3903198 (1975-09-01), Wei
patent: 3928500 (1975-12-01), Kraft et al.

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