Refining of polyarylene sulfides

Details Refining of polyarylene sulfides Refining of polyarylene sulfides

1993-12-22

1994-11-01

Bleutge, John C.

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

Synthetic resins

From sulfur-containing reactant

528501, 528373, 525537, C08G 7516

Patent

active

053608909

ABSTRACT:
Fractional refining of crude polyarylene sulfides as synthesized provide refined polyarylene sulfides exhibiting improved mechanical properties. A reaction mixture liquor comprising a crude product polyarylene sulfide in an organic amide medium is subjected to distillation for removal of the amide medium. Then the residue is leached with a hot solvent so as to recover a higher molecular weight fraction (solid) and discard a lower molecular weight fraction (liquid).

REFERENCES:
patent: 4415729 (1983-11-01), Scoggins et al.
patent: 4524200 (1985-06-01), Sherk et al.
patent: 4645826 (1987-02-01), Iizuka et al.
patent: 4789729 (1988-12-01), Nagira et al.
patent: 5071947 (1991-10-01), Nakamura et al.

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