Mitsubishi Chemical Corporation

Atsushi Kusuno

Hiroshi Nakano

Satoshi Kato

Kazunori Yano

Hiroyuki Kaneko

Rie Shirahama

Masanobu Miwa

Yuuko Motegi

Mai Inagaki

Kohei Kikuchi

A biodegradable laminate includes: an aliphatic polyester-based resin layer; a bonding layer; and a polyvinyl alcohol-based resin layer laminated on at least one surface of the aliphatic polyester-based resin layer with the bonding layer therebetween. The aliphatic polyester-based resin layer includes an aliphatic polyester-based resin composition containing an aliphatic polyester-based resin (A) including a repeating unit derived from an aliphatic diol and a repeating unit derived from an aliphatic dicarboxylic acid as main constituent units, a polyhydroxyalkanoate (B) including a 3-hydroxybutyrate unit as a main constituent unit, and an inorganic filler (C).

Biodegradable laminate

The present invention relates to a polyester resin composition comprising: (A) a polyester resin containing 5% by mole or more and not more than 86% by mole of a succinic acid unit in the whole of an aliphatic dicarboxylic acid unit; (B) a polyester resin containing 5% by mole or more and not more than 95% by mole of an aromatic dicarboxylic acid unit in all of dicarboxylic acid units; and (C) a polyester resin containing an aliphatic oxycarboxylic acid, wherein the polyester resin composition contains from 10 to 89% by weight of the resin (A) and from 11 to 90% by weight of the resin (B) relative to a total sum of the resins (A) and (B) and contains from 1 to 40% by weight of the resin (C) relative to a total sum of the resins (A), (B) and (C).

Polyester resin composition

An aliphatic polyester polyether copolymer is provided having an aliphatic polyester moiety comprising 35 to 50 molar % of an aliphatic diol unit, 35 to 50 molar % of an aliphatic dicarboxylic acid unit and 0 to 30 molar % of an aliphatic oxycarboxylic acid unit and a polyether moiety, wherein &#x3b7;/C is not less than 1.40 and the ratio by weight of the polyether moiety to the aliphatic polyester polyether copolymer is 0.1 to 90% by weight.

Aliphatic polyester polyether copolymer, process for producing the same and aliphatic polyester composition using the copolymer

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Mie, Japan

Atsushi Kusuno