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Bio-based degradable foaming copolyester and preparation method thereof

A copolyester, bio-based technology, applied in the field of polyester synthesis, can solve the problems of high processing temperature, high equipment requirements, lack of elasticity, etc., and achieve the effects of improving mechanical properties, simplifying production process, and widening foaming interval.

Pending Publication Date: 2022-06-24
ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After chain extension, the fluidity is poor, the processing temperature is high, and the requirements for equipment are also high. The rigidity of the foam board is relatively strong, and it is not elastic.

Method used

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  • Bio-based degradable foaming copolyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A bio-based degradable foamed copolyester, the preparation method of which is:

[0042] (1) Esterification: 60 parts of terephthalic acid, 20 parts of succinic acid, 20 parts of sebacic acid, 20 parts of 1,4-butanediol and 80 parts of comonomer diol (20 parts of 1,4- Cyclohexanedimethanol + 60 parts of ethylene glycol), 0.05 part of catalyst ethylene glycol antimony were added to the 2.5L reaction kettle, stirred at 100 ° C for 15 min, under N 2 Under the protection, pressurize and heat up to 0.30MPa, 230℃ to carry out esterification reaction, stir and collect condensed water until the end of water outlet;

[0043] (2) Polycondensation: add 0.02 part of reaction buffer triphenyl phosphite into the polymerization reaction kettle, stir for 10 minutes, and draw a low vacuum. At the same time, the temperature of the kettle is set to 220° C. After the vacuum instrument reaches -101kPa, a high vacuum is drawn, and the degree of vacuum After reaching below 100Pa, record the c...

Embodiment 2

[0053] The difference with Embodiment 1 is that step (1) is:

[0054] (1) Esterification: 70 parts of terephthalic acid, 20 parts of succinic acid, 10 parts of sebacic acid, 20 parts of 1,4-butanediol and 80 parts of comonomer diol (20 parts of neopentyl glycol +60 parts of ethylene glycol) and 0.05 parts of catalyst ethylene glycol antimony were added to the 2.5L reaction kettle, stirred at 100 ° C for 15 min, and heated under N 2 Under protection, pressurize and heat up to 0.30MPa and 230°C to carry out esterification reaction, and stir to collect condensed water until the end of water effluent.

Embodiment 3

[0056] The difference with Embodiment 1 is that step (1) is:

[0057] (1) Esterification: 60 parts of terephthalic acid, 20 parts of succinic acid, 20 parts of sebacic acid, 25 parts of 1,4-butanediol and 75 parts of comonomer diol (15 parts of 1,4- Cyclohexanedimethanol + 60 parts of ethylene glycol), 0.05 part of catalyst ethylene glycol antimony were added to the 2.5L reaction kettle, stirred at 100 ° C for 15 min, under N 2 Under protection, pressurize and heat up to 0.30MPa and 230°C to carry out esterification reaction, and stir to collect condensed water until the end of water effluent.

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Abstract

The invention relates to the field of polyester synthesis, and provides bio-based degradable foaming copolyester and a preparation method thereof in order to solve the problems that polyester foaming processing temperature is high, foaming ratio is low, and a foaming product is difficult to degrade. The bio-based degradable foaming copolyester comprises terephthalic acid, succinic acid, sebacic acid, 1, 4-butanediol, a copolymerized diol monomer, a catalyst and a reaction buffer agent. The copolymerized glycol monomer comprises ethylene glycol, and further comprises propylene glycol, pentanediol, neopentyl glycol, 1, 4-cyclohexanedimethanol or 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanediol, and the copolymerized glycol monomer also comprises propylene glycol, pentanediol, neopentyl glycol, 1, 4-cyclohexanedimethanol or 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanediol. The bio-based degradable foaming copolyester is a low-melting-point or non-crystalline random copolyester, is convenient to process and wide in foaming interval, can overcome the defects in the prior art through the synergistic effect of all the components by utilizing the synthesis method, can improve the mechanical property of the material, can also improve the biodegradation speed of the material, and can be used for preparing the biodegradable foaming copolyester. The environment pollution is reduced.

Description

technical field [0001] The invention relates to the field of polyester synthesis, in particular to a bio-based degradable foamed copolyester and a preparation method thereof. Background technique [0002] In recent years, the research on the synthesis of degradable polyesters has developed rapidly, but currently there are only two mature biodegradable polyester products: polybutylene adipate-terephthalate (PBAT) and polylactic acid (PLA). These two degradable polyesters are widely used in the market. Although PBAT has excellent performance in various aspects and can replace polyethylene in a large amount, all its synthetic raw materials are still derived from petroleum at present. Although all synthetic raw materials of PLA are obtained by starch fermentation, it has the defects of poor heat resistance and low notch strength. Hard to use alone. [0003] Polyethylene terephthalate (PET) is widely used in fiber weaving, packaging and other fields due to its excellent mechani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/199C08G63/83C08G63/85C08G63/86C08J9/12C08L67/02
CPCC08G63/199C08G63/866C08G63/85C08G63/83C08J9/122C08J2203/06C08J2367/02
Inventor 李金隆王松林冉启迪朱楷潘臣玉
Owner ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD