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A kind of biodegradable bio-based 2,5-furandicarboxylic acid-based copolyester and its preparation method and application

A technology of furandicarboxylic acid-based copolyester and furandicarboxylic acid, which is applied in the manufacture of one-component copolyester rayon, one-component polyester rayon, and rayon, and can solve the problem of low degradability , slow crystallization rate, poor mechanical properties, etc., to achieve good mechanical properties, speed up crystallization speed, and improve color

Active Publication Date: 2022-05-03
ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to overcome the problems of low molecular weight and slow crystallization rate of the current 2,5-furandicarboxylic acid-based polyester, resulting in high product brittleness, poor mechanical properties, and low degradability, etc., and proposes a biodegradable bio-based 2,5-furandicarboxylic acid-based copolyester and its preparation method and application

Method used

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  • A kind of biodegradable bio-based 2,5-furandicarboxylic acid-based copolyester and its preparation method and application
  • A kind of biodegradable bio-based 2,5-furandicarboxylic acid-based copolyester and its preparation method and application
  • A kind of biodegradable bio-based 2,5-furandicarboxylic acid-based copolyester and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0044] Embodiment 1: A kind of preparation method of biodegradable bio-based 2,5-furandicarboxylate copolyester comprises the following preparation steps:

[0045] 1) Esterification reaction:

[0046] Mix 2,5-furandicarboxylic acid and ethylene glycol at a molar ratio of 1:1.6, then add 0.1mol% tetrabutyl titanate, 0.0015wt% phosphoric acid and 0.003wt% Antioxidant 1010, then carry out esterification reaction at 180°C and 150kPa, until the content of distilled small molecules reaches more than 95% of the theoretical value, the reaction is terminated to obtain an esterification liquid;

[0047] 2) Precondensation reaction:

[0048] Add polyethylene glycol with a number average molecular weight of 2000g / mol and a content of 20wt% relative to 2,5-furandicarboxylic acid to the esterification solution and stir evenly, then raise the temperature to 235°C and control the pressure between 100-1000Pa Precondensation reaction obtains prepolymer;

[0049] 3) Final polycondensation rea...

Embodiment 2

[0051] Embodiment 2: A kind of preparation method of degradable bio-based 2,5-furandicarboxylic acid-based copolyester comprises the following preparation steps:

[0052] 1) Esterification reaction:

[0053] Mix 2,5-furandicarboxylic acid and ethylene glycol uniformly at a molar ratio of 1:1.4, then add a titanium-antimony composite catalyst with a content of 0.15mol% relative to 2,5-furandicarboxylic acid, 0.001wt% triphenyl phosphate and 0.005wt% antioxidant 618, the titanium-antimony composite catalyst is obtained by compounding titanium-silicon composite catalyst and ethylene glycol antimony with a mass ratio of 0.3:0.7; then carry out esterification reaction at 230°C and 50kPa until distillation When the content of the small molecules produced reaches more than 95% of the theoretical value, the reaction is terminated to obtain an esterification liquid;

[0054] 2) Precondensation reaction:

[0055] Add polyethylene glycol with a number average molecular weight of 2000g / ...

Embodiment 3

[0058] Embodiment 3: A kind of preparation method of degradable bio-based 2,5-furandicarboxylic acid-based copolyester comprises the following preparation steps:

[0059] 1) Esterification reaction:

[0060] Mix 2,5-furandicarboxylic acid and ethylene glycol at a molar ratio of 1:2, then add a titanium-antimony composite catalyst with a content of 0.25mol% relative to 2,5-furandicarboxylic acid, 0.002wt% polyphosphoric acid and 0.005 wt% antioxidant 1010, the titanium-antimony composite catalyst is obtained by compounding titanium ethylene glycol and antimony trioxide at a mass ratio of 0.6:0.4; then esterification is carried out at 190°C and 200kPa until the distilled When the content of small molecules reaches more than 95% of the theoretical value, the reaction is terminated to obtain an esterification liquid;

[0061] 2) Precondensation reaction:

[0062] Add polyethylene glycol with a number average molecular weight of 600g / mol and a content of 40wt% relative to 2,5-fur...

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Abstract

The invention discloses a degradable bio-based 2,5-furandicarboxylic acid-based copolyester and its preparation method and application, and relates to the field of copolyester preparation. Its molecular chain consists of bio-based polyester segments and functional poly ether chains. The method of copolymerization links PEG short chains evenly between PEF segments, and uses flexible and hydrophilic PEG short chains to endow the entire copolyester with certain degradable properties; moreover, the content and number of PEG can be adjusted during the preparation process The average molecular weight controls the degradation rate of the PEF-PEG copolyester, and a bio-based copolyester with an adjustable degradation rate is prepared.

Description

technical field [0001] The invention relates to the field of copolyester preparation, in particular to a degradable bio-based 2,5-furandicarboxylate copolyester and its preparation method and application. Background technique [0002] In order to achieve sustainable, green and environmentally friendly development of polymer materials and related fine chemical industries, the world is looking for bio-based raw materials that can replace petroleum-based materials, thereby reducing dependence on petroleum, improving national energy security, and reducing the impact of the petroleum industry on the environment. pollute. Polyethylene 2,5-furandicarboxylate (PEF) is a new type of polyester material obtained by esterification and polycondensation of bio-based 2,5-furandicarboxylic acid (FDCA) and ethylene glycol. The polyester material not only has a molecular structure similar to that of polyethylene terephthalate (PET), but also its raw materials are derived from bio-based mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/672D01F6/92D01F1/10D01F6/84C08L67/02C08L97/02C08L61/28C08J9/40C08J9/28
CPCC08G63/672D01F6/92D01F1/10D01F6/84C08L67/025C08J9/40C08J9/28C08J2397/02C08J2461/28C08J2361/28C08J2201/0484C08J2205/026C08L2205/24C08L2205/16C08L97/02C08L61/28
Inventor 张婉迎胡宇苗徐锦龙王松林
Owner ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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