METHOD FOR PRODUCING ALIPHATIC POLYESTER, ALIPHATIC POLYESTER RESIN, AND ALIPHATIC POLYESTER RESIN COMPOSITION

[Problem] An object of the present disclosure is to provide a method for producing an aliphatic polyester resin which substantially does not contain impurities, such as metals, and which has high molecular weight, particularly a polylactic acid having high molecular weight and high optical purity.[M...

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Bibliographische Detailangaben
Hauptverfasser:	MIYAMOTO Masanori, MASUDA Takaya
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	[Problem] An object of the present disclosure is to provide a method for producing an aliphatic polyester resin which substantially does not contain impurities, such as metals, and which has high molecular weight, particularly a polylactic acid having high molecular weight and high optical purity.[Means for Resolution] The method for producing an aliphatic polyester resin of the present disclosure has a step of contacting a solution containing a cyclic ester with a cyclic amine catalyst and a polymerization initiator to initiate a reaction, a step of conducting the reaction by flow-type polymerization, and a step of subjecting the product obtained in the flow-type polymerization to further reaction by postpolymerization by stirring.