LACTATE POLYESTER COMPOSITION AND MOLDED PRODUCT THEREOF

PROBLEM TO BE SOLVED: To obtain a lactate polyester composition which is excellent in moldability, heat stability and storage stability, can be biodegraded after use, generates a small quantity of heat and no noxious gases when burnt, and is useful for packaging materials by mixing a specified lacta...

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Bibliographische Detailangaben
Hauptverfasser:	KAKIZAWA YASUTOSHI, FURUTA HIDEYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain a lactate polyester composition which is excellent in moldability, heat stability and storage stability, can be biodegraded after use, generates a small quantity of heat and no noxious gases when burnt, and is useful for packaging materials by mixing a specified lactate polyester with a plasticizer. SOLUTION: This composition is prepared by mixing a lactate polyester (A) subjected to treatment of deactivating the polymerization catalyst with a plasticizer (B) in a weight ratio of 99/1 to 40/60. A preferable example of the composition is one obtained by using a chelating agent and/or an acid phosphoric ester to deactivate the polymerization catalyst for this polyester. Component B is desirably a polyester plasticizer comprising repeating units each of which is derived from a dibasic acid and a dihydric alcohol and having a number-average molecular weight of 500-20,000, more desirable a plasticizer terminated with a monobasic acid and/or a monohydric alcohol.