METHOD FOR PRODUCING POLYARYLENE SULFIDE

• Main Authors: SHOJI YASUHIRO, UETA OSAMU, OUCHI TOSHIAKI
• Format: Patent
• Language: English; Japanese
• Published: 22.03.2019
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide a method for producing a polyarylene sulfide (hereinafter referred to as PAS) that can suppress the foaming of a reaction liquid and the by-production of water-insoluble products when performing dehydration of a raw material for PAS.SOLUTION: The method for producing PAS is a method for producing PAS by polymerizing a sulfur source and a dihaloaromatic compound in an organic polar solvent and includes: an organic polar solvent addition step of adding an organic polar solvent to a sulfur source aqueous solution containing a sulfur source and water but not containing an organic polar solvent and having a water content of 2.1 mol or more per 1 mol of the sulfur source to produce a sulfur source-containing solution; and a dehydration step of performing dehydration from the sulfur source-containing solution.SELECTED DRAWING: None 【課題】ポリアリーレンスルフィド（以下、ＰＡＳ）の原料を脱水する際、反応液の発泡と不溶性生成物の副生とを抑制することができるＰＡＳの製造方法を提供する【解決手段】本発明に係るＰＡＳの製造方法は、有機極性溶媒中で硫黄源とジハロ芳香族化合物とを重合させてＰＡＳを製造する方法であって、前記方法は、硫黄源及び水を含有し、有機極性溶媒を含有せず、含水量が前記硫黄源１モルに対し２．１モル以上である硫黄源水溶液に有機極性溶媒を添加して、硫黄源含有溶液を得る有機極性溶媒添加工程と、前記硫黄源含有溶液からの脱水を行う脱水工程と、を含む。【選択図】なし