Title:
POLYLACTIC ACID POLYMER COMPOSITION
Document Type and Number:
Japanese Patent JP3723157
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To solve problems that polylactic acid becomes amorphous when quenched by injection molding, etc., and has a high melt viscosity with difficulties in production and processing and a molded product is deformed by its own weight, etc., at a temperature between the glass transition point (about 60°C) and the crystallization temperature (about 100°C) and has inferior heat distortion resistance.
SOLUTION: This polymer composition comprises a polyester polymer (A) selected from polyL-lactic acid homopolymer, polyD-lactic acid homopolymer and polyL/D lactic acid copolymer and a polyester block copolymer (B) in which a crystalline polyester segment comprising an aliphatic dicarboxylic acid and a chain diol as components is bound to a polylactic acid segment in a weight ratio of the crystalline polyester segment to the polylactic acid segment within the range of (97/3) to (50/50). In the polymer composition, the polyester polymer (A) is mixed with the polyester block copolymer (B) in a weight ratio (A/B) within the range of (97/3) to (40/60).
Inventors:
Masao Matsui
Takeshi Kanamori
Takeshi Kanamori
Application Number:
JP2002204768A
Publication Date:
December 07, 2005
Filing Date:
April 05, 1996
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
TORAY INDUSTRIES,INC.
TORAY INDUSTRIES,INC.
International Classes:
C08L67/00; C08K3/00; C08L101/16; (IPC1-7): C08L67/00
Domestic Patent References:
| JP9272790A | ||||
| JP7118513A | ||||
| JP4335060A |
Attorney, Agent or Firm:
Yusuke Hiraki
Satoshi Fujita
Satoshi Fujita
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