Vinyl halide polymer of enhanced plasticizer uptake

Details Vinyl halide polymer of enhanced plasticizer uptake Vinyl halide polymer of enhanced plasticizer uptake

1981-08-05

1983-04-12

Levin, Stanford M.

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...

526 88, 5263441, C08F 202, C08F11406, C08K 511

Patent

active

043798802

ABSTRACT:
Vinyl halide polymer is prepared by bulk liquid phase polymerization of vinyl halide monomer in the presence of a minor proportion, based on the weight of the polymerization reaction mass, of isobutane diluent followed by application of reduced pressure to remove diluent and unreacted monomer from the polymer.
The product exhibits improved porosity and molten color stability compared to vinyl halide polymers prepared in bulk in the presence of conventional alkane hydrocarbon diluents.

REFERENCES:
patent: 3522227 (1970-07-01), Thomas
patent: 3642744 (1972-02-01), Moberly et al.
patent: 3926931 (1975-12-01), Koyanagi et al.
patent: 4155899 (1979-05-01), Lemper et al.
patent: 4205149 (1980-05-01), Cich et al.

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