Method of producing polyarylene sulfide

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11203665
APP PUB NO 20200385525A1
SERIAL NO

17000073

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Abstract

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The production method of the present invention includes

    a step of supplying an organic polar solvent, a sulfur source, and a dihalo aromatic compound as reaction raw materials to at least one of a plurality of reaction vessels mutually communicated via a gas phase; a step of removing at least a portion of the water present in the reaction vessels; and a step of performing a polymerization reaction. These steps are carried out in parallel, and the reaction mixture is sequentially moved between reaction vessels. At that time, the internal temperatures of the reaction vessels are all not less than 150° C.

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Patent Owner(s)

Patent OwnerAddress
KUREHA CORPORATION3-3-2 NIHONBASHI-HAMACHO CHUO-KU TOKYO 1038552 ?1038552

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Miyahara, Michihisa Tokyo, JP 30 198
Sakabe, Hiroshi Tokyo, JP 37 151
Satake, Yoshikatsu Tokyo, JP 52 488
Suzuki, Kenji Tokyo, JP 1029 11556

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