PDC-LACTIC ACID COPOLYESTER AND MOLDED ARTICLE THEREOF

Title:

PDC-LACTIC ACID COPOLYESTER AND MOLDED ARTICLE THEREOF

Document Type and Number:

WIPO Patent Application WO/2007/148471

Kind Code:

A1

Abstract:

The object is to provide a polyester which comprises a biomass-derived raw material in a repeat unit structure and has satisfactory levels of dynamic strength, ease of molding processing into a fiber or film and biodegradability. Disclosed is a PDC-L-lactic acid copolyester represented by the general formula: -[R1-PDC]x-[OCH(CH3)CO]1-x- (I) wherein PDC represents a dicarboxylic acid residue represented by the formyula (II) shown below; R1 represents a group selected from -O(CH2)nO-, -O(CH2CH2O)m- and -O[CH(CH3)CH2O]m-; n represents an integer ranging from 3 to 6; m represents an integer ranging from 1 to 4; x satisfies the requirement shown by the formula: 0.005 ≤ x ≤ 0.2 when n or m satisfies the following requirement: n ≤ 4 or m ≤ 2, or x satisfies the requirement shown by the formula: 0.005 ≤ x ≤ 0.4 when n or m does not satisfy the above-mentioned requirement. Also disclosed is a molded article comprising the PDC-L-lactic acid copolyester.

Inventors:

MASE KOHEI (JP)
SHIMO TOSHIHISA (JP)
OHARA NAOKI (JP)
SHIGEHARA KIYOTAKE (JP)

Application Number:

PCT/JP2007/058690

Publication Date:

December 27, 2007

Filing Date:

April 17, 2007

Export Citation:

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Assignee:

TOYOTA JIDOSHOKKI KK (JP)
UNIV TOKYO NAT UNIV CORP (JP)
MASE KOHEI (JP)
SHIMO TOSHIHISA (JP)
OHARA NAOKI (JP)
SHIGEHARA KIYOTAKE (JP)

International Classes:

C08G63/60; C08L101/16

Domestic Patent References:

WO1999054376A1	1999-10-28
WO1999054384A1	1999-10-28

Foreign References:

JP2004256747A	2004-09-16
JP2005278549A	2005-10-13
JP2000032988A	2000-02-02
JP2001226566A	2001-08-21
JP2005521718A	2005-07-21
JP2001226566A	2001-08-21
JP2006022325A	2006-01-26
JP2004204217A	2004-07-22
JP2003128768A	2003-05-08
JP2005278549A	2005-10-13
JP2000032988A	2000-02-02

Other References: