Preparation method of biodegradable polyester with low carboxyl end group content

A technology of biodegradable polyester and low-end carboxyl group is applied in the field of preparation of biodegradable polyester, which can solve the problems of unknown effect of end carboxyl group content, difficult control of reaction conditions, difficult operation, etc., so as to improve the anti-aging ability and the reaction The conditions are easy to control and the effect of prolonging the service life

Active Publication Date: 2014-01-08
山东悦泰生物新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is only suitable for the transesterification reaction system, not for the alkyd reaction system. At present, most of the polyester materials and their reaction processes use the alkyd reaction system, not the transesterification reaction system.
Also, for aliphatic polyester / copolyester and aliphatic-aromatic copolyester systems, the effect of this method on reducing carboxyl-terminated content is unknown
Both CN101104677A and CN201132824Y have reported respectively that the control of the content of polyester terminal carboxyl groups is realized by modifying and designing polyethylene terephthalate (PET) reaction equipment, and the control of reaction conditions is difficult, difficult to operate, and high in cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 59g of succinic acid and 54g of butanediol to the reaction flask, stir and raise the temperature to 160°C, after the esterification reaction, add 0.086g ADR4368, reacted for 1 hour, added 0.05g tetrabutyl titanate, raised the temperature to 240°C, evacuated to 50-100Pa, and polycondensed for 2 hours to obtain a white polymer with an intrinsic viscosity of 1.45, a b value of 5, and a carboxyl-terminal content of 15mmol / kg.

Embodiment 2

[0026] Add 100.3g of succinic acid, 21.9g of adipic acid and 117g of butanediol to the reaction bottle, stir and raise the temperature to 175°C. After the esterification reaction, add 1.76g of 1,4-butanediol diglycidyl ether, and react for 0.5 After 1 hour, add 0.15g of tetrabutyl titanate, raise the temperature to 230°C, evacuate to 50-100Pa, and conduct polycondensation for 3 hours to obtain a white polymer with an intrinsic viscosity of 1.30, a b value of 4, and a carboxyl-terminal content of 8mmol / kg.

Embodiment 3

[0030]Add 78g of terephthalic acid, 77.4g of adipic acid and 135g of 1,4-butanediol into the reaction bottle, stir and raise the temperature to 260°C. After the esterification reaction, add 1.05g of bisphenol A epoxy resin 0161 (Wuxi Bluestar Petrochemical Co., Ltd.), reacted for 0.8 hours, added 0.2g tetrabutyl titanate, cooled to 245°C, vacuumed to 50-100Pa, and polycondensed for 2.5 hours to obtain a white polymer with an intrinsic viscosity of 1.48, b The value is 6, and the carboxyl-terminal content is 20mmol / kg.

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Abstract

The invention relates to a preparation method of biodegradable polyester, and specifically relates to a preparation method of biodegradable polyester with a low carboxyl end group content. The method comprises esterification reactions and condensation and polymerization reactions: after the esterification reaction, polycyclic oxy-compounds are directly added into the reaction products to carry out reactions, and the reaction products are subjected to carry out condensation and polymerization reactions so as to obtain the biodegradable polyester with a low carboxyl end group content, wherein the carboxyl end group content is 5 to 20 mmol / kg. The invention aims to solve the problem of high carboxyl end group content in biodegradable polyesters, namely aliphatic polyester / copolymer and aliphatic-aromatic copolyester materials. The method provided by the invention reduces the carboxyl end group content in the materials, improves the flux strength, shortens the reaction time, obtains a polyester material with a good color (low b value), improves the anti-aging ability of the biodegradable polyester material, and prolongs the service life of the biodegradable polyester material. The preparation method has the advantages of controllable reaction conditions, low cost, and suitability for industrial production.

Description

technical field [0001] The invention relates to a preparation method of biodegradable polyester, in particular to a preparation method of biodegradable polyester with low carboxyl group content. Background technique [0002] With a series of advantages such as light density, good toughness, easy processing and molding, anti-corrosion and anti-rust, etc., plastics have gradually become the darling of packaging materials, entered various fields of people's lives, and become an indispensable part of people's lives. However, due to people's excessive dependence on plastics and the lack of effective recycling measures for plastics, serious "white pollution" has resulted. [0003] Aliphatic polyester / copolyester and aliphatic-aromatic copolyester materials have good biodegradability and help to solve the problem of "white pollution" caused by traditional plastics, and have attracted more and more attention and favor. In recent years, major companies at home and abroad have launch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/16C08G63/181C08G63/183C08G63/46C08G63/78
Inventor 庞买只卢伟李宗华
Owner 山东悦泰生物新材料有限公司
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