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Preparation methods for poly(polybutylene glycol-adipate-terephthalate) and polylactic-acid block copolymer of poly(polybutylene glycol-adipate-terephthalate)

A technology of terephthalic acid butanediol adipate and terephthalic acid, which is applied in the field of polymer materials and can solve problems such as unfavorable industrial production, increased process complexity and production costs

Active Publication Date: 2016-04-27
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above patent uses two-step bulk melting reaction to synthesize block PLA-PBAT-PLA, without using solvents, and the production process is more environmentally friendly, but the first step of polycondensation and the second step of ring-opening copolymerization add different catalysts, adding catalysts in multiple steps, increasing the process Complexity and production cost are not conducive to industrial production

Method used

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preparation example Construction

[0022] The embodiment of the invention discloses a preparation method of poly(butylene terephthalate adipate) ester, comprising:

[0023] Under the catalysis of stannous benzoate, the source of terephthalic acid, adipic acid and butanediol are polycondensed to obtain poly(butylene adipate terephthalate).

[0024] The present invention also provides a kind of preparation method of poly(butylene terephthalate adipate)-polylactic acid block copolymer, comprising the following steps:

[0025] Under the catalysis of stannous benzoate, terephthalic acid source, adipic acid and butanediol are carried out polycondensation reaction, obtain poly(butylene adipate terephthalate);

[0026] The poly(butylene terephthalate adipate) ester and lactide are mixed and then reacted to obtain a poly(butylene terephthalate adipate)-polylactic acid block copolymer.

[0027] The application adopts stannous benzoate as the catalyst for preparing poly(butylene terephthalate adipate) ester and poly(buty...

Embodiment 1

[0044] Add 83g of terephthalic acid, 72g of adipic acid, 91g of butanediol, and 0.5g of stannous benzoate into a 1L dehydration kettle with a condenser; when the temperature in the kettle rises to 160°C, start mechanical stirring to collect the polycondensation reaction Water; when no liquid distills out in the condenser, turn on the vacuum pump to vacuum 10-200Pa to carry out deep polycondensation, and at the same time gradually raise the temperature to 230°C, and react at 230°C for 14 hours to obtain molten poly(butylene terephthalate adipate diol) ester (PBAT);

[0045] Cool down the above-mentioned dehydration kettle so that the temperature of the PBAT material drops to 160°C, use a metering pump to introduce 100g of molten PBAT into a polymerization kettle with mechanical stirring, and then add 200g of lactide to start stirring and vigorously mix. After mixing, the temperature of the material is 140 After rising to 180°C at 5°C / hour, stop the reaction, extrude and granula...

Embodiment 2

[0048] Add 83g of terephthalic acid, 72g of adipic acid, 91g of butanediol, and 0.5g of stannous benzoate into a 1L dehydration kettle with a condenser; when the temperature in the kettle rises to 160°C, start mechanical stirring to collect the polycondensation reaction Water; when there is no liquid distilled out in the condenser, turn on the vacuum pump to evacuate 100-200Pa for deep polycondensation. diol) ester (PBAT);

[0049] Cool down the above-mentioned dehydration kettle so that the temperature of the PBAT material drops to 160°C. Use a metering pump to introduce 100g of molten PBAT into a polymerization kettle with mechanical stirring, and then add 100g of lactide to start stirring and vigorously mix. After mixing, the temperature of the material is 140 After rising to 180°C at 5°C / hour, stop the reaction, extrude and granulate to obtain poly(butylene terephthalate adipate)-polylactic acid (PLA-PBAT-PLA) block copolymer.

[0050] Take by weighing block copolymer 100...

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Abstract

The invention provides a preparation method for poly(polybutylene glycol-adipate-terephthalate). The preparation method comprises the step of carrying out a condensation polymerization reaction on a terephthalic acid source, adipic acid and butylene glycol under the catalytic action of stannous benzoate, so as to obtain poly(polybutylene glycol-adipate-terephthalate). The invention further provides a preparation method for a polylactic-acid block copolymer of poly(polybutylene glycol-adipate-terephthalate). The method comprises the following steps: carrying out the condensation polymerization reaction on the terephthalic acid source, adipic acid and butylene glycol under the catalytic action of stannous benzoate, so as to obtain poly(polybutylene glycol-adipate-terephthalate); and mixing poly(polybutylene glycol-adipate-terephthalate) with lactide, and then, carrying out a reaction, thereby obtaining the polylactic-acid block copolymer of poly(polybutylene glycol-adipate-terephthalate). During the preparation of the block copolymer, the preparation of the block copolymer can be achieved by only adding the catalyst, i.e., stannous benzoate once, so that the preparation process is simple, and industrial production is facilitated.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a poly(butylene terephthalate adipate) and a poly(butylene terephthalate adipate)-polylactic acid block copolymer method of preparation. Background technique [0002] General-purpose plastics such as polyethylene have excellent mechanical properties and can be processed into various daily products, bringing convenience to people's lives. It takes decades for waste plastic to decompose, which brings great harm to the natural environment. It remains in the soil for a long time, which can affect the growth of plants and endanger the survival of animals. Therefore, the development of environmentally friendly degradable plastics to replace traditional non-degradable plastics and solve white pollution has become the development direction of the current polymer industry. The development of environmentally friendly bio-based products has become a strategic requirement for tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/60C08G63/85
CPCC08G63/60C08G63/823
Inventor 项盛张宝冯立栋陈学思李杲边新超刘焱龙孙彬
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI