Method for purifying aliphatic polyester and aliphatic polyester purified with said method

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United States of America Patent

PATENT NO 9688809
APP PUB NO 20160083507A1
SERIAL NO

14785490

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Abstract

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Provided is a method for purifying an aliphatic polyester which reduces coloring of the aliphatic polyester, reduces the amount of residual monomer and residual catalyst, and improves stability and appearance. This method for purifying an aliphatic polyester subjects an aliphatic polyester containing a monomer to heat treatment under dry air containing oxygen at a temperature at or above the melting point of the monomer and at or below the melting point of the aliphatic polyester.

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Patent Owner(s)

Patent OwnerAddress
MUSASHINO CHEMICAL LABORATORY LTDCHUO-KU TOKYO 104-0031

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aoki, Tsuyoshi Tokyo, JP 58 1345
Machida, Jun Kitaibaraki, JP 13 74
Suzuki, Koichiro Tokyo, JP 37 539
Tokushige, Yukiko Tokyo, JP 1 1

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