Method for producing a polyarylene sulfide
AssigneeToray Industries, Inc.
InventorsShunsuke Horiuchi, Atsushi Ishio, Kei Saitoh
Life of this patent
Estimating the term…
Abstract
This invention provides a method for producing a polyarylene sulfide, comprising the step of bringing a low-hydrated alkali metal sulfide containing respectively 0.05 to less than 0.8 mole of water and an organic amide solvent per mole of the sulfur contained in the alkali metal sulfide, into contact with a dihalogenated aromatic compound in an organic polar solvent for polymerization. This invention also provides a polyarylene sulfide obtained by the method. The problem to be solved by this invention is to provide a method for efficiently producing a polyarylene sulfide in a short time using an alkali metal sulfide small in water content and organic amide solvent content.
Claims6
A method for producing a polyarylene sulfide, comprising a step of bringing a low-hydrated alkali metal sulfide containing 0.05 to less than 0.8 mole each of water and an organic amide solvent per mole of the sulfur contained in the alkali metal sulfide, into contact with a dihalogenated aromatic compound in an organic polar solvent for polymerization, wherein the low-hydrated alkali metal sulfide is obtained by a method of eliminating an organic amide solvent and water from a mixture containing at least (a) an alkali metal sulfide, (b) 0.8 to 10 moles of the organic amide solvent and (c) 0.8 to 20 moles of water, respectively, per mole of the sulfur contained in the alkali metal sulfide, to adjust the water content and the organic amide solvent content of the mixture respectively into the range of from 0.05 mole to less than 0.8 mole per mole of the sulfur contained in the alkali metal sulfide.
Dependencies are inferred from the claim text.