Process for preparing polyarylene thioether having thiol/thiolat

Details Process for preparing polyarylene thioether having thiol/thiolat Process for preparing polyarylene thioether having thiol/thiolat

1987-02-17

1988-08-02

Anderson, Harold D.

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

Synthetic resins

From sulfur-containing reactant

526 59, 526 60, C08G 7514

Patent

active

047614684

ABSTRACT:
In a process for producing a polyarylene thioether having high stability by dehalogenation/sulfurization reaction of an alkali metal (M) sulfide such as sodium sulfide and a dihaloaromatic compound such as paradichlorobenzene in a polar organic solvent, the haloaromatic compound is used excessively in an appropriate range rather than the alkali metal sulfide and the latter stage of the reaction or all period of the reaction is conducted under a powerful stirring condition to a certain degree to obtain the polyarylene thioether wherein the concentration of --SM or --SH groups of the polymer terminal is lowered. The polyarylene thioether thus obtained suppresses the coloration in the processing with an apparatus made of ferrous material such as extruder.

REFERENCES:
patent: 3408342 (1968-10-01), Horvath et al.
patent: 4238585 (1980-12-01), Bertozzi
patent: 4282347 (1981-08-01), Tieszen et al.
patent: 4324886 (1982-04-01), Edmonds et al.
patent: 4362864 (1982-12-01), Idel et al.
patent: 4605732 (1986-08-01), Heitz et al.
patent: 4608433 (1986-08-01), Meyer et al.

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