【発明の名称】生分解性ポリエステルの製造方法

Title:

【発明の名称】生分解性ポリエステルの製造方法

Document Type and Number:

Japanese Patent JP3122659

Kind Code:

B1

Abstract:

PROBLEM TO BE SOLVED: To provide a new biodegradable plastic by effectively utilizing waste PET bottles, and to provide a method for producing the same plastic. SOLUTION: This method for producing a biodegradable polyester where the content of terephthalic acid component is 5-50 wt.% based on the total content of the terephthalic acid component and succinic acid component comprises the following processes: a waste PET bottle chip-liquefying process for obtaining a liquid product by reacting waste PET bottle chips with 1,4- butanediol at >=140 deg.C in the presence of a transesterification catalyst; and a polyester-producing process for producing a polyester made from terephthalic acid component, succinic acid component and 1,4-butanediol component by adding dimethyl succinate to the above liquid product to react them at 100-140 deg.C while discharging methanol as a by-product and then heating the reaction product at >=190 deg.C to perform further reaction.

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Inventors:

Takashi Masuda
Akio Matsuda
Fart Sakaguchi
Hamaya Kensei

Application Number:

JP26390299A

Publication Date:

January 09, 2001

Filing Date:

September 17, 1999

Export Citation:

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Assignee:

Director of Industrial Technology
Takashi Masuda
Akio Matsuda
Fart Sakaguchi
Hamaya Kensei

International Classes:

C08G63/183; C08G63/78; C08J11/10; C08L101/16; (IPC1-7): C08G63/78; C08J11/10

Domestic Patent References:

JP7157553A

Attorney, Agent or Firm:

Toshiaki Ikeura (1 outside)
Toshiaki Ikeura

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