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Biodegradable copolyester composition

A technology of biodegradation and copolyester, which is applied in the field of biodegradable copolyester composition, and can solve the problem of limited use of copolyester with low heat performance

Active Publication Date: 2017-10-17
PTT GLOBAL CHEMICAL PUBLIC COMPANY LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The low heat properties of the resulting copolyesters limit their use

Method used

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  • Biodegradable copolyester composition
  • Biodegradable copolyester composition
  • Biodegradable copolyester composition

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preparation example Construction

[0045] The synthetic method of copolyester composition according to the present invention comprises the following steps:

[0046] - adding to the reactor about 40 to 60 mole % of aromatic dicarboxylic acid, about 40 to 60 mole % of aliphatic dicarboxylic acid based on the total moles of aromatic and aliphatic dicarboxylic acids, and and at least one molar equivalent of diol to the total number of moles of aliphatic dicarboxylic acids;

[0047] - adding about 0.1 to 2.0 mol % of an alcohol having at least 3 hydroxyl groups, based on the total moles of the composition in the previous step;

[0048] - heating the mixture of the previous step at a temperature from 170 to 250 ° C and stirring for 30 minutes under nitrogen atmosphere;

[0049] - adding tetrabutyl titanate catalyst and stirring the mixture until no water condenses from the reactor;

[0050] - reduce the pressure below 40 mbar by using a vacuum pump;

[0051] - stirring the mixture at a temperature of about 170 to ...

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Abstract

This invention relates to a biodegradable copolyester composition, comprising: a) from 40 to 60 mol %, based on total mole of a) and b), of aromatic dicarboxylic acid selected from benzene dicarboxylic acid or ester derivative of said acid; b) from 40 to 60 mol %, based on total mole of a) and b), of a mixture of aliphatic dicarboxylic acid, wherein b) comprising: bl) from 20 to 80 mol %, based on mole of b), of at least one aliphatic dicarboxylic acid having 2 to 6 carbon atoms; and b2) from 20 to 80 mol %, based on mole of b), of at least one aliphatic dicarboxylic acid having 7 to 14 carbon atoms; c) at least one mole equivalent, based on total mole of a) and b), of diol having 2 to 6 carbon atoms; and d) from 0.1 to 2.0 mole % based on total mole of a), b), c), and d), of alcohol with at least 3 hydroxyl groups. The biodegradable copolyester composition according to this invention has improved thermal property, mechanical property, and biodegradability.

Description

Contents of the invention [0001] The present invention relates to biodegradable copolyester compositions prepared by polycondensation of diols with mixtures of aromatic dicarboxylic acids and aliphatic dicarboxylic acids, wherein the biodegradable copolyester compositions comprise: [0002] a) 40 to 60 mol % of an aromatic dicarboxylic acid selected from phthalic acid or an ester derivative of this acid, based on the total number of moles of a) and b); [0003] b) a mixture of 40 to 60 mol % aliphatic dicarboxylic acids, based on the total number of moles of a) and b), wherein b) comprises: [0004] b1) 20 to 80 mol % of at least one aliphatic dicarboxylic acid having 2 to 6 carbon atoms, based on the number of moles in b); and [0005] b2) 20 to 80 mol %, based on the moles of b), of at least one aliphatic dicarboxylic acid having 7 to 14 carbon atoms; [0006] c) at least one molar equivalent of diols having 2 to 6 carbon atoms, based on the total number of moles of a) and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/20C08G63/183C08L67/02
CPCC08G63/183C08G63/20C08L67/02C08L2201/06C08G2230/00
Inventor 苏查达·唐-阿蒙苏卡桑亚努帕特·波蒂萨蒂特然永
Owner PTT GLOBAL CHEMICAL PUBLIC COMPANY LIMITED
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