Process for preparing arylene sulfide polymer with addition of a

Details Process for preparing arylene sulfide polymer with addition of a Process for preparing arylene sulfide polymer with addition of a

1991-05-13

1993-08-24

Anderson, Harold D.

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

Synthetic resins

From sulfur-containing reactant

528374, 528381, 528387, 528390, C08G 7516

Patent

active

052390500

ABSTRACT:
A process for preparing high molecular weight arylene sulfide polymers by dehydrating an aqueous mixture of a sulfur source and a cyclic organic amide to form a dehydrated mixture, contacting the dehydrated mixture with a dihaloaromatic compound to produce a polymerization mixture, polymerizing the polymerization mixture and recovering the arylene sulfide polymer wherein an aqueous alkali metal carboxylate mixture is added to the polymerization mixture after the conversion of the dihaloaromatic compound is about 40 percent to about 30 minutes prior to entering into termination of the polymerization. In another embodiment, a process for preparing high molecular weight arylene sulfide polymers by contacting an essentially anhydrous sulfur source, a cyclic organic amide, and a dihaloaromatic compound to form a polymerization mixture, polymerizing the polymerization mixture and recovering the arylene sulfide polymer wherein an aqueous alkali metal carboxylate mixture is added to the polymerization mixture after the conversion of the dihaloaromatic compound is about 40 percent to about 30 minutes prior to entering into termination of the polymerization.

REFERENCES:
patent: 3800845 (1974-04-01), Scoggin
patent: 3919177 (1975-11-01), Campbell
patent: 4025496 (1977-05-01), Anderson et al.
patent: 4415729 (1983-11-01), Scoggins et al.
patent: 4645826 (1987-02-01), Iizuka et al.
patent: 4748231 (1988-05-01), Nesheiwat

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