Process for preparing polyarylene sulfides with sodium hydrosulf

Details Process for preparing polyarylene sulfides with sodium hydrosulf Process for preparing polyarylene sulfides with sodium hydrosulf

1989-08-30

1992-03-03

Anderson, Harold D.

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

Synthetic resins

From sulfur-containing reactant

528 86, 528210, 528391, C08G 7516

Patent

active

050934694

ABSTRACT:
Polyarylene sulfides are prepared by reacting a dihalogen aromatic compound with a sodium hydrosulfide in the presence of an alkali metal aminoalkanoate and a lithium halide in an organic polar solvent. This process can prevent a decomposition of the sodium hydrosulfide during dehydration and produce the polyarylene sulfides in a granular form in high yields and with high efficiency.
The polyarylene sulfides obtainable by this process are high in molecular weight and degree of whiteness and low in a content of salts remaining therein. Furthermore, the polyarylene sulfides are in the granular form so that they can be handled with ease because of their readily separability and washability.

REFERENCES:
patent: 3867356 (1975-02-01), Campbell
patent: 4038263 (1977-07-01), Edmonds, Jr. et al.
patent: 4451643 (1984-05-01), Edmonds, Jr. et al.
patent: 4837301 (1989-06-01), Glock et al.

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