Title:
POLYARYLENE SULFIDE PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/234992
Kind Code:
A1
Abstract:
Provided is a polyarylene sulfide production method by which high-melt-viscosity polyarylene sulfide can be produced while suppressing generation of ultrafine powder. The polyarylene sulfide production method comprising: (1) a charging step for preparing a charged mixture containing an organic polar solvent, a sulfur source, and a dihaloaromatic compound; (2) a preceding-stage polymerization step for heating the charged mixture to initiate a polymerization reaction and generate a prepolymer; (3) a phase separation step for adding water as a phase separation agent to the reaction mixture within the reaction system to form a phase-separated state; and (4) a subsequent-stage polymerization step for continuing the polymerization reaction after the phase separation step, wherein the conversion rate of the dihaloaromatic compound in the preceding-stage polymerization step is 80% by mass or more to 93% by mass or less, and an aromatic compound containing three or more halogen atoms bonded to an aromatic ring is added to the reaction mixture at a point in time after the weight-average molecular weight of the prepolymer has reached 10,000 or more.
Inventors:
SATO TAKESHI (JP)
SAITO MIZUKI (JP)
TAKAKI KEN-ICHI (JP)
SUZUKI YOSHINORI (JP)
SAITO MIZUKI (JP)
TAKAKI KEN-ICHI (JP)
SUZUKI YOSHINORI (JP)
Application Number:
PCT/JP2020/047916
Publication Date:
November 25, 2021
Filing Date:
December 22, 2020
Export Citation:
Assignee:
KUREHA CORP (JP)
International Classes:
C08G75/0231; C08G75/025
Domestic Patent References:
| WO2011125480A1 | 2011-10-13 | |||
| WO2006068159A1 | 2006-06-29 |
Foreign References:
| JP2016108488A | 2016-06-20 | |||
| JP2004123958A | 2004-04-22 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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