Invention Grant
- Patent Title: Method for producing polyarylene sulphide resin
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Application No.: US16622964Application Date: 2018-06-26
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Publication No.: US11312823B2Publication Date: 2022-04-26
- Inventor: Masaya Kadoki , Saori Nara , Taku Ibaraki , Hideki Watanabe , Satoshi Inoue
- Applicant: DIC Corporation
- Applicant Address: JP Tokyo
- Assignee: DIC Corporation
- Current Assignee: DIC Corporation
- Current Assignee Address: JP Tokyo
- Agency: Locke Lord LLP
- Priority: JPJP2017-127442 20170629,JPJP2018-070829 20180402
- International Application: PCT/JP2018/024120 WO 20180626
- International Announcement: WO2019/004171 WO 20190103
- Main IPC: C08G75/0259
- IPC: C08G75/0259 ; C08G75/0213 ; C08G75/0254 ; C08J3/20 ; C08J5/00

Abstract:
Provided is a method for producing a polyarylene sulfide resin, the method including subjecting a dihaloaromatic compound and a sulfidizing agent to a polymerization reaction in the presence of an aliphatic cyclic compound having a ring openable by hydrolysis, in which corrosion of a production apparatus is suppressed. More particularly, provided is a method for producing a polyarylene sulfide resin, the method including a dehydration step (1) in which a water-containing sulfidizing agent and an aliphatic cyclic compound having a ring openable by hydrolysis are heated in the presence of a dihaloaromatic compound to a liquid temperature in the range of 90° C. or higher and 170° C. or lower under the atmospheric pressure, and then dehydration is performed while maintaining the liquid temperature and reducing the pressure to a pressure in the range of 30 [kPa abs] or higher and 80 [kPa abs] or lower to thus obtain a mixture.
Public/Granted literature
- US20210147630A1 METHOD FOR PRODUCING POLYARYLENE SULPHIDE RESIN Public/Granted day:2021-05-20
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