Back to results
US 7,317,072 B2Granted
Process for the production of polyarylene sulfide resins
AssigneeIdemitsu Kosan Co., Ltd.
InventorsMinoru Senga, Koichi Suga, Tomio Ohno
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeIdemitsu Kosan Co., Ltd.
InventorsMinoru Senga, Koichi Suga, Tomio Ohno
Estimating the term…
The present invention is a process for the production of polyarylene sulfide based resin, wherein in washing a polyarylene sulfide based resin with a mixed solvent of an aprotic organic solvent and water in a softened or molten state, the polyarylene sulfide based resin partially dissolved in the washing liquid is recovered, to be specific, the polyarylene sulfide based resin dissolved in the washing liquid is precipitated, separated and recovered by cooling the washing liquid after washing and/or adding water to the washing liquid, and it is reused. According to the present invention, capable of being provided is a process for the production of polyarylene sulfide based resin in which the polyarylene sulfide based resin formed by polymerization is scarcely lost in washing the above resin with a solvent.
A process for the production of a polyarylene sulfide based resin comprising washing said polyarylene sulfide based resin in a softened or molten state with a washing liquid comprising water and at least one aprotic organic solvent, wherein polyarylene sulfide based resin dissolved in the washing liquid is recovered by precipitating and separating it from said washing liquid by at least one technique selected from the group consisting of cooling the washing liquid after washing or adding water to the washing liquid after washing.
Dependencies are inferred from the claim text.