Title:
METHOD FOR PRODUCING GRANULAR POLYARYLENE SULFIDE, AND GRANULAR POLYARYLENE SULFIDE
Document Type and Number:
WIPO Patent Application WO/2016/199894
Kind Code:
A1
Abstract:
Provided are: a method for producing granular polyarylene sulfide (PAS) having an improved grain strength with an improved yield of the granular PAS by integrating and collecting polyarylene sulfide (PAS), having an intermediate molecular weight, into the granular PAS; and the granular PAS. The method for producing granular PAS according to the present invention includes a polymerization step for subjecting a dihaloaromatic compound and at least one sulfur source selected from the group consisting of alkali metal sulfides and alkali metal hydrosulfides to a polymerization reaction in an organic amide solvent to obtain a reaction product mixture, and a cooling step for cooling the reaction product mixture after the polymerization step, wherein addition of a phase separator into the reaction product mixture is started at a time point between the start of the polymerization step and the start of formation of the granular PAS in the cooling step, the phase separator is added to the reaction product mixture by 50 mass% or more while the temperature of the reaction product mixture is 245°C or higher, and the polymerization step includes a predetermined PAS prepolymer generation step, and a predetermined conversion step to obtain a high-molecular-weight PAS.
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Inventors:
KIMURA TAKAYUKI (JP)
KATAMACHI JINYA (JP)
SUZUKI KENJI (JP)
KAWAMA HIROHITO (JP)
KATAMACHI JINYA (JP)
SUZUKI KENJI (JP)
KAWAMA HIROHITO (JP)
Application Number:
PCT/JP2016/067380
Publication Date:
December 15, 2016
Filing Date:
June 10, 2016
Export Citation:
Assignee:
KUREHA CORP (JP)
International Classes:
C08G75/04
Foreign References:
| JPS617332A | 1986-01-14 | |||
| JPH06145355A | 1994-05-24 | |||
| JPH07330903A | 1995-12-19 | |||
| JPH08183858A | 1996-07-16 | |||
| JPS591536A | 1984-01-06 | |||
| JP2004051732A | 2004-02-19 | |||
| JP2001089569A | 2001-04-03 |
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
Right wood Masayuki (JP)
Right wood Masayuki (JP)
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