Method for producing polyalkylene oxide

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United States of America

PATENT NO 12195589
APP PUB NO 20230082443A1
SERIAL NO

17944371

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Abstract

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A method for producing a polyalkylene oxide includes step 1 of performing a polymerization reaction of an alkylene oxide in the presence or absence of a chain transfer agent to obtain a high-molecular-weight polyalkylene oxide; and step 2 of irradiating the high-molecular-weight polyalkylene oxide obtained in step 1 with radiation to obtain a polyalkylene oxide, wherein the amount of the chain transfer agent when used is less than 300 mass ppm relative to the alkylene oxide, and the high-molecular-weight polyalkylene oxide obtained in step 1 has a viscosity at 25° C. in a 1 mass % aqueous solution of 7500 mPa·s or more.

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Patent Owner(s)

Patent OwnerAddress
SUMITOMO SEIKA CHEMICALS CO LTDKAKO-GUN HYOGO 675-0145

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Imamura, Yuika Himeji, JP 4 0
Kimura, Akira Himeji, JP 274 3254

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