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Preparation method of fully biodegradable copolyester

A copolyester and all-biological technology, which is applied in the field of preparation of all-biodegradable copolyester, can solve the problems of poor tensile yield strength, tear resistance and light transmission performance, so as to improve the polymerization reaction rate without affecting the thermal The effect of stability and guaranteed yield

Active Publication Date: 2019-11-22
四川中科兴业高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is: in order to solve the problems of poor tensile yield strength, tear resistance and light transmission performance of existing fully biodegradable copolyesters, the present invention provides a preparation method of fully biodegradable copolyesters

Method used

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  • Preparation method of fully biodegradable copolyester

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Experimental program
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Effect test

Embodiment 1

[0028] This embodiment provides a kind of preparation method of fully biodegradable copolyester, and specific preparation comprises the following steps:

[0029] (1) Terephthalic acid with a molar ratio of 1:1 and 1,4-butanediol are catalyzed by ethylene glycol titanium with a mass fraction of 0.3‰, under a nitrogen atmosphere and at a reaction temperature of 230°C for esterification The reaction is carried out for 2 hours, and the by-product water is continuously discharged during the reaction process. When the esterification rate reaches 99%, the reaction is terminated to obtain the esterified product A;

[0030] (2) Take adipic acid with a molar ratio of 1:1 and 1,4-butanediol to carry out esterification reaction under nitrogen atmosphere at a reaction temperature of 200°C, and react for 2 hours. During the reaction process, the by-product water is continuously discharged. When the esterification rate reaches more than 85%, the reaction is terminated to obtain esterified pr...

Embodiment 2

[0033] This embodiment provides a kind of preparation method of fully biodegradable copolyester, and specific preparation comprises the following steps:

[0034] (1) Terephthalic acid with a molar ratio of 1:2 and 1,4-butanediol were catalyzed by ethylene glycol titanium with a mass fraction of 1‰, under a nitrogen atmosphere and at a reaction temperature of 230°C for esterification The reaction is carried out for 2 hours, and the by-product water is continuously discharged during the reaction process. When the esterification rate reaches 99%, the reaction is terminated to obtain the esterified compound A;

[0035] (2) Take adipic acid with a molar ratio of 1:2 and 1,4-butanediol to carry out esterification reaction under nitrogen atmosphere at a reaction temperature of 200°C, and react for 2 hours. During the reaction process, the by-product water is continuously discharged. When the esterification rate reaches more than 85%, the reaction is terminated to obtain esterified pr...

Embodiment 3

[0038] This embodiment provides a kind of preparation method of fully biodegradable copolyester, and specific preparation comprises the following steps:

[0039] (1) Take isophthalic acid and 1,10-decanediol with a molar ratio of 1:1 under the catalysis of tetrapropyl titanate with a mass fraction of 1.5‰, under a nitrogen atmosphere and at a reaction temperature of 230°C Esterification reaction, reaction for 2 hours, the by-product water is continuously discharged during the reaction process, and when the esterification rate reaches 99%, the reaction is terminated to obtain esterified compound A;

[0040](2) Take adipic acid with a molar ratio of 1:1 and 1,10-decanediol to carry out esterification reaction under a nitrogen atmosphere at a reaction temperature of 200°C, and react for 2 hours, and the by-product water is continuously discharged during the reaction process. When the esterification rate reaches more than 85%, the reaction is terminated to obtain esterified produc...

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Abstract

The invention discloses a preparation method of fully-biodegradable copolyester, relates to the technical field of fully-biodegradable copolyester preparation, and solves the problems of poor tensileyield strength, tearing resistance and light transmittance of the existing fully-biodegradable copolyester. According to the preparation method, main raw materials contain aromatic dibasic acid, aliphatic diol and aliphatic dibasic acid, wherein the aromatic dibasic acid is one of terephthalic acid or isophthalic acid; the aliphatic diol is one of C4-C10 saturated diols, and the aliphatic dibasicacid is adipic acid. The disclosed copolyester has strong fracture resistance, excellent elasticity, good processability and strong light transmission, and can hardly be snapped.

Description

technical field [0001] The present invention relates to the technical field of preparation of fully biodegradable copolyester, and more specifically relates to a preparation method of fully biodegradable copolyester, which is used for preparing fully biodegradable copolyester with better light transmission and moisture permeability. Background technique [0002] Fully biodegradable copolyester has the characteristics of aliphatic polyester and aromatic polyester. It not only has good ductility and elongation at break, but also has good heat resistance and impact performance; in addition, it also has excellent It is one of the biodegradable materials that are very active in the research of biodegradable materials and the market application group. [0003] However, this type of resin also has the following obvious defects: when the resin is made into a film material, the moisture permeability of the film material is poor, which affects the application of the film material. At...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672C08G63/85
CPCC08G63/672C08G63/85
Inventor 刘洪范永志陈俊张维克
Owner 四川中科兴业高新材料有限公司
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