Process for continuous production of polyarylene sulfide

Details Process for continuous production of polyarylene sulfide Process for continuous production of polyarylene sulfide

2006-04-11

2006-04-11

Hightower, P. Hampton (Department: 1711)

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

Synthetic resins

From sulfur-containing reactant

C528S387000, C528S388000, C528S391000

Reexamination Certificate

active

07026439

ABSTRACT:
There is disclosed a process for continuously producing a polyarylene sulfide which comprises reacting a sulfur source with a dihalogenated aromatic compound in an aprotic organic solvent, characterized by maintaining the content of the dihalogenated aromatic compound in the polymerization liquid after the substantial completion of the polymerization reaction at 5 mg/g or higher. It is made possible by the process according to the present invention to efficiently produce the polyarylene sulfide which has a high molecular weight and is excellent in thermal stability.

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Patent Abstracts of Japan, JP 08-134216, May 28, 1996.

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