Process for purification of polyphenylene-sulfide

Details Process for purification of polyphenylene-sulfide Process for purification of polyphenylene-sulfide

1987-03-20

1988-03-01

Anderson, Harold D.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528388, 528480, 528487, 528490, C08G 7514

Patent

active

047287233

ABSTRACT:
Polyphenylene-sulfide having a much reduced content of impurities is prepared by adding an inorganic acid or organic acid to a slurry of polyphenylene-sulfide as-obtained by condensation reaction of an aromatic polyhalide compound with an alkali metal sulfide in the presence of a polar organic solvent, to adjust the pH of the slurry to a value not higher than 6, stirring the pH-adjusted slurry, filtering the slurry, and washing and drying the recovered solid.

REFERENCES:
patent: 3407182 (1968-10-01), Hinton
patent: 4071509 (1978-01-01), Edmonds

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