Removal of vinyl halide from polyvinyl halide

Details Removal of vinyl halide from polyvinyl halide Removal of vinyl halide from polyvinyl halide

1976-08-13

1978-08-15

Henderson, Christopher A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

526344, 528480, C08F 624, C08F 600

Patent

active

041074211

ABSTRACT:
A method for reducing the vinyl halide content of polyvinyl halide, in particle form, containing vinyl halide, to a preselected level is disclosed. Briefly, the method comprises: (a) determining the threshold temperature corresponding to said preselected level of vinyl halide, and (b) purging the polyvinyl halide containing vinyl halide with an inert gas heated to a temperature of at least the determined threshold temperature until the vinyl halide content of the polyvinyl halide reaches said preselected level.

REFERENCES:
patent: 3522227 (1970-07-01), Thomas
patent: 3622553 (1971-11-01), Cines

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