Method for producing polyalkylene oxide and polyalkylene oxide

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United States of America Patent

PATENT NO 12116454
APP PUB NO 20230088981A1
SERIAL NO

17944339

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Abstract

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A method for producing a polyalkylene oxide includes a step of irradiating a high-molecular-weight polyalkylene oxide with radiation in the presence or absence of an antioxidant to obtain a polyalkylene oxide,

    whereinthe high-molecular-weight polyalkylene oxide before irradiation has a viscosity at 25° C. in a 1 mass % aqueous solution of 1500 to 16000 mPa·s,when the antioxidant is present, the antioxidant is present in an amount of less than 2000 mass ppm relative to the total mass of the high-molecular-weight polyalkylene oxide, andthe following formula (1):0≤C3×I×10−8<30  (1),whereinC is the concentration of the antioxidant used in the step, and represents the proportion (mass ppm) of the antioxidant relative to the total mass of the polyalkylene oxide, and I represents the irradiation dose (kGy) of the radiation emitted in the above step, is satisfied.

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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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