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US 8,541,490 B2Granted
Aliphatic polyester resin composition and process for production thereof
AssigneeKureha Corporation
InventorsFumio Akutsu, Naoki Hayashi, Hiroyuki Sato, Masumi Shibata, Akiko Watanabe
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Abstract
A process for producing an aliphatic polyester resin composition, wherein an aliphatic polyester resin is melt-kneaded with a phosphoric acid ester having a reduced moisture content of 1.5 wt. % or less. As a result, an aliphatic polyester resin composition having an improved moisture resistance is provided.
Claims7
A process for producing an aliphatic polyester resin composition, comprising the steps of:
- drying a phosphoric acid ester with a particle diameter of at most 3.0 mm with dry gas set to a temperature equal to or lower than a melting point of the phosphoric acid ester to a reduced moisture content of 0.7 wt. % or less;
- and
- melt-kneading an aliphatic polyester resin with the dried phosphoric acid ester.
Dependencies are inferred from the claim text.