Process for the production of polyarylene sulfide resins

Details Process for the production of polyarylene sulfide resins Process for the production of polyarylene sulfide resins

2008-01-08

2008-01-08

Boykin, Terressa (Department: 1711)

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

Synthetic resins

Treating polymer containing material or treating a solid...

C264S101000, C264S103000, C264S143000, C264S155000, C264S500000, C264S511000, C524S493000, C524S494000, C524S495000, C528S388000

Reexamination Certificate

active

07317072

ABSTRACT:
The present invention is a process for the production of polyarylene sulfide based resin, wherein in washing a polyarylene sulfide based resin with a mixed solvent of an aprotic organic solvent and water in a softened or molten state, the polyarylene sulfide based resin partially dissolved in the washing liquid is recovered, to be specific, the polyarylene sulfide based resin dissolved in the washing liquid is precipitated, separated and recovered by cooling the washing liquid after washing and/or adding water to the washing liquid, and it is reused. According to the present invention, capable of being provided is a process for the production of polyarylene sulfide based resin in which the polyarylene sulfide based resin formed by polymerization is scarcely lost in washing the above resin with a solvent.

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