Process for producing cyclic polyarylene sulfide
AssigneeToray Industries, Inc.
InventorShunsuke Horiuchi
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Abstract
A method for producing a cyclic polyarylene sulfide, wherein a cyclic polyarylene sulfide is produced by heating a reaction mixture which is composed of at least a linear polyarylene sulfide (a), a sulfidizing agent (b), a dihalogenated aromatic compound (c) and an organic polar solvent (d). This method for producing a cyclic polyarylene sulfide is characterized in that not less than 1.25 liters of the organic polar solvent is used per 1 mole of the sulfur content in the reaction mixture. This method enables to efficiently produce a cyclic polyarylene sulfide, more specifically cyclic oligoarylene sulfide by an economical and simple process in short time.
Claims10
A process for producing a cyclic polyarylene sulfide comprising heating a reaction mixture containing at least
- (a) a linear polyarylene sulfide,
- (b) a sulfidizing agent,
- (c) a dihalogenated aromatic compound, and
- (d) an organic polar solvent,
- to cause a reaction to produce a cyclic polyarylene sulfide wherein the amount of the organic polar solvent is 1.25 liters or more per mole of sulfur in the reaction mixture.
Dependencies are inferred from the claim text.