Process for production of poly(arylene thioether) copolymer

Details Process for production of poly(arylene thioether) copolymer Process for production of poly(arylene thioether) copolymer

1991-11-26

1993-10-26

Bleutge, John C.

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

Synthetic resins

From carboxylic acid or derivative thereof

528388, C08G 6368, C08G 7500

Patent

active

052567630

ABSTRACT:
Disclosed herein is a process for the production of a granular poly(arylene thioether) copolymer by polymerizing an alkali metal sulfide with dihalo-aromatic compounds including at least one dihalo-aromatic carboxylic acid in a polar solvent containing water. Upon the polymerization, at least a part of the dihalo-aromatic carboxylic acid is converted into an alkaline earth metal salt in advance, the hydroxide and/or oxide of an alkaline earth metal is added together with the dihalo-aromatic carboxylic acid to the polymerization reaction system, or the hydroxide and/or oxide of an alkaline earth metal is added together with an alkaline earth metal salt of the dihalo-aromatic carboxylic acid and the dihalo-aromatic carboxylic acid to the polymerization reaction system.

REFERENCES:
patent: 4125525 (1978-11-01), Campbell
patent: 4371671 (1983-02-01), Anderson
patent: 4645826 (1987-02-01), Iizuka et al.
patent: 4848190 (1989-07-01), Inoue et al.
patent: 4910294 (1990-03-01), Ogata et al.
patent: 5037953 (1991-08-01), Inoue et al.
European Search Report (Nov. 13, 1992).

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