Manufacture of polyvinyl chloride of low vinyl chloride monomer

Details Manufacture of polyvinyl chloride of low vinyl chloride monomer Manufacture of polyvinyl chloride of low vinyl chloride monomer

1974-06-24

1977-03-29

Michl, Paul R.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528495, 528501, C08F 610

Patent

active

040150640

ABSTRACT:
Vinyl chloride is removed from a slurry or latex that contains from 100 to 15,000 parts per million of vinyl chloride and 5% to 50% by weight of a vinyl chloride polymer by adding to the slurry or latex from about 0.5% to 20% of its weight of a compound selected from the group consisting of vinyl acetate, methylene chloride, di-tert.butyl-p-cresol, and mixtures thereof, maintaining the resulting mixture at a temperature between 25.degree. C. and 125.degree. C. under vacuum, and removing the vinyl chloride vapor that is evolved until the slurry or latex contains not more than 50 ppm of vinyl chloride.

REFERENCES:
patent: 2458636 (1949-01-01), Plambeck
patent: 2550996 (1951-05-01), Halby
patent: 2662867 (1953-12-01), Hoertz et al.
patent: 2673193 (1954-03-01), Kolvoort
patent: 3052663 (1962-09-01), Bodlaender et al.
patent: 3847853 (1974-11-01), Suzuki et al.

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