STEREOCOMPLEX POLYLACTIC ACID AND ITS MANUFACTURING PROCESS

STEREOCOMPLEX POLYLACTIC ACID AND ITS MANUFACTURING PROCESS

PROBLEM TO BE SOLVED: To provide a stereocomplex polylactic acid which has a large molecular weight, an excellent moldability and a high melting point and is highly crystalline. SOLUTION: The stereocomplex polylactic acid consists of (A) a polylactic acid unit A composed of a 90-99 mol% L-lactic aci...

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Hauptverfasser: NONOKAWA RYUJI, TOYOHARA KIYOTSUNA, KOMAZAWA TOMOKA, MAEDA YASUTO, KIMURA YOSHIHARU
Format: Patent
Sprache:eng
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CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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creator NONOKAWA RYUJI
TOYOHARA KIYOTSUNA
KOMAZAWA TOMOKA
MAEDA YASUTO
KIMURA YOSHIHARU
description PROBLEM TO BE SOLVED: To provide a stereocomplex polylactic acid which has a large molecular weight, an excellent moldability and a high melting point and is highly crystalline. SOLUTION: The stereocomplex polylactic acid consists of (A) a polylactic acid unit A composed of a 90-99 mol% L-lactic acid unit and a 1-10 mol% D-lactic acid unit other than lactic acid and/or copolymer unit composed of lactic acid and (B) a polylactic acid unit B composed of a 90-99 mol% D-lactic acid unit and a 1-10 mol% L-lactic acid unit and/or a copolymer unit and has an average molecular weight of 100,000-500,000 and a ratio of the melting peak at ≥195°C of ≥80% in the melting peaks appearing in the course of rising temperature in differential scanning colorimetry (DSC). COPYRIGHT: (C)2006,JPO&NCIPI
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subjects CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
title STEREOCOMPLEX POLYLACTIC ACID AND ITS MANUFACTURING PROCESS
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