Process for preparing a granular polyarylene sulfides having hig

Details Process for preparing a granular polyarylene sulfides having hig Process for preparing a granular polyarylene sulfides having hig

1990-12-24

1993-08-31

Kight, III, John

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

Synthetic resins

From sulfur-containing reactant

526 65, C08G 7514, C08G 8500, C08F 200

Patent

active

052410439

ABSTRACT:
A process for preparing a granular polyarylene sulfide having a high molecular weight is a one-stage polycondensation process which involves subjecting a dihalogen aromatic compound to polycondensation with a source of sulfur in the presence of a polymerization aid in an organic polar solvent and setting the temperature for polycondensation to a range from 220.degree. C. to 248.degree. C. for a predetermined period of time prior to completion of polycondensation up to completion of polycondensation. The resulting granular polyarylene sulfide is suitable for molding or forming into sheets, films, fibers and so on, causes less burrs when subjected to injection molding, has a high molecular weight sufficient to create the property of forming a gel, and is easy to handle.

REFERENCES:
patent: 4089847 (1978-05-01), Edmonds, Jr.
patent: 4393197 (1983-07-01), Edmonds, Jr.
patent: 4921935 (1990-05-01), Dorf et al.

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