Vinyl chloride polymer composition modified for transparency, im

Details Vinyl chloride polymer composition modified for transparency, im Vinyl chloride polymer composition modified for transparency, im

1976-05-11

1977-08-09

Tillman, Murray

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 23XA, 260 237M, 260 237R, 260890, 260892, A43B 1304, C08L 5106, C08F 624

Patent

active

040411060

ABSTRACT:
Provided are vinyl chloride polymer compositions having a composite elastomer modifier incorporated therein, whereby said polymers exhibit on excellent balance of the physical properties of thermal resistance, transparency, and impact resistance. The composite elastomer modifier is comprised of (A) 20 to 60% by weight of a graft copolymer prepared by grafting methyl methacrylate and styrene onto a butadiene rubber in a specified sequential multi-stage polymerization procedure of (B) 40 to 80% by weight of a copolymer comprised of .alpha.-methylstyrene, methyl methacrylate and acrylonitrile. The composite elastomer modifier may be prepared by either blending graft copolymer (A) with copolymer (B) or by polymerizing a monomer charge of copolymer (B) in the presence of graft copolymer (A).

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