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US 5,177,183 AGranted
Process for synthesis of aromatic sulfides
OwnerAllan S. Hay, Zhi Y. Wanginventors
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Abstract
Aromatic sulfides including diarylsulfides and poly(arylene sulfides) are produced in a novel synthesis in high yield under moderate conditions by heating an aromatic disulfide in the presence of aromatic halide, in which the halide is chloride, bromide or iodide; the diaryl sulfides are useful precursors and starting materials for a range of compounds and the poly(arylene sulfides) are important high temperature engineering thermoplastics.
Claims12
A process for producing a poly(arylene sulfide) comprising:
- heating a halodisulfide of formula (III.sub.B):
- X.sup.1 -Ar-S-S-Ar-X.sup.2 (III.sub.B)
- at a temperature of 200.degree. to 270.degree. C. to form a poly(arylene sulfide) composed of arylene sulfide units of formula:
- -Ar-S-
- derived solely from said halodisulfide, in which each Ar is the same or different and is a divalent hydrocarbon aromatic radical unsubstituted or substituted one or more times by radicals selected from the group consisting of fluorine, carboxyl, cyano, alkoxy, aryloxy, thioalkoxy and thioaryloxy;
- and X.sup.1 and X.sup.2 are each selected from the group consisting of chlorine, bromine and iodine atoms.
3 more elements
A process for producing a poly(arylene sulfide) consisting essentially of heating a halodisulfide of formula (III.sub.B):
- X.sup.1 -Ar-S-S-Ar-X.sup.2 (III.sub.B)
- at a temperature of 200.degree. to 270.degree. C. to form a poly(arylene sulfide) from said halodisulfide, in which each Ar is the same or different and is a divalent hydrocarbon aromatic radical unsubstituted or substituted one or more times by radicals selected from the group consisting of fluorine, carboxyl, cyano, alkoxy, aryloxy, thioalkoxy and thioaryloxy;
- and X.sup.1 and X.sup.2 are each selected from the group consisting of chlorine, bromine and iodine atoms.
Dependencies are inferred from the claim text.