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2,5-furandicarboxylic-terephthalic-aliphatic copolyester and preparation method thereof

A technology of aliphatic dihydric alcohol and terephthalic acid, which is applied in the field of polyester, can solve the problems of high price and limited production of terephthalic acid, and achieve good performance.

Active Publication Date: 2012-05-02
芜湖万隆新材料有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Among them, the molecular formula of terephthalic acid as one of the raw materials is C 8 h 6 o 4 , with a molecular weight of 166.13, although it is the most productive dicarboxylic acid, it is also a chemical product that depends on petroleum resources. Not only is it expensive, but with the increasing depletion of petroleum resources, the production of terephthalic acid will also be limited

Method used

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  • 2,5-furandicarboxylic-terephthalic-aliphatic copolyester and preparation method thereof

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[0035] The present invention also provides a kind of 2, the preparation method of 5-furandicarboxylic acid-terephthalic acid-aliphatic glycol copolyester, comprises the following steps:

[0036] Under the action of a catalyst, 2,5-furandicarboxylic acid, terephthalic acid and aliphatic dihydric alcohol undergo an esterification reaction to obtain a first intermediate product;

[0037] The first intermediate product is subjected to polycondensation reaction to obtain 2,5-furandicarboxylic acid-terephthalic acid-aliphatic dihydric alcohol copolyester.

[0038] In the invention, firstly, 2,5-furandicarboxylic acid, terephthalic acid and aliphatic dihydric alcohol are uniformly mixed, and a catalyst is added for esterification reaction to obtain a first intermediate product.

[0039] The present invention uses 2,5-furandicarboxylic acid from a wide range of sources as a raw material. The source of the 2,5-furandicarboxylic acid is not particularly limited in the present invention,...

Embodiment 1

[0056] Mix 3mol 2,5-furandicarboxylic acid, 3mol terephthalic acid and 7.2mol ethylene glycol evenly, and add 0.018% titanium with a mass of 2,5-furandicarboxylic acid, terephthalic acid and ethylene glycol tetrabutyl acid, under the protection of nitrogen, the esterification reaction was carried out at a temperature of 190 ° C and a pressure of 0.25 MPa. After 200 minutes of reaction, the first intermediate product was obtained;

[0057] After the esterification reaction is finished, continue to add 0.004% trimethyl phosphate with a mass of 2,5-furandicarboxylic acid, terephthalic acid and ethylene glycol, raise the temperature to 220°C, and reduce the pressure to The reaction was carried out at 20 Pa, and after 260 minutes of reaction, light brown 2,5-furandicarboxylic acid-terephthalic acid-ethylene glycol copolyester was obtained.

[0058] Infrared spectrum analysis is carried out to described 2,5-furandicarboxylic acid-terephthalic acid-ethylene glycol copolyester, analys...

Embodiment 2

[0064]Mix 3mol 2,5-furandicarboxylic acid, 3mol terephthalic acid and 9.6mol ethylene glycol evenly, and add 0.018% titanium with a mass of 2,5-furandicarboxylic acid, terephthalic acid and ethylene glycol tetrabutyl acid, under the protection of nitrogen, the esterification reaction was carried out at a temperature of 190 ° C and a pressure of 0.25 MPa, and after 200 minutes of reaction, the first intermediate product was obtained;

[0065] After the esterification reaction is finished, continue to add trimethyl phosphate whose mass is 0.004% of the total mass of 2,5-furandicarboxylic acid, terephthalic acid and ethylene glycol, raise the temperature to 220°C, and reduce the pressure to The reaction was carried out at 50 Pa, and after 360 minutes of reaction, light brown 2,5-furandicarboxylic acid-terephthalic acid-ethylene glycol copolyester was obtained.

[0066] The intrinsic viscosity of the 2,5-furandicarboxylic acid-terephthalic acid-ethylene glycol copolyester was meas...

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Abstract

The invention provides 2,5-furandicarboxylic-terephthalic-aliphatic copolyester and a preparation method thereof. 2,5-furandicarboxylic-terephthalic-aliphatic copolyester has a first repetitive unit represented by a formula (I) and a second repetitive unit represented by a formula (II), wherein x=2 to 8. The molar ratio of the first repetitive unit to the second repetitive unit is 1:1000-1000:1. 2,5-furandicarboxylic-terephthalic-aliphatic copolyester provided by the invention has a structure and even a good performance similar to that of diol polyterephthalate. 2,5-furandicarboxylic-terephthalic-aliphatic copolyester can be used for preparing materials such as engineering plastics and membranes. As one of the raw materials, 2,5-furandicarboxylic acid can be obtained based on renewable resources, such that the resource is wide, and is not influenced by increasingly exhausted petroleum resources. The invention also provides a preparation method of 2,5-furandicarboxylic-terephthalic-aliphatic copolyester.

Description

technical field [0001] The invention relates to the technical field of polyester, in particular to a 2,5-furandicarboxylic acid-terephthalic acid-aliphatic dihydric alcohol copolyester and a preparation method thereof. Background technique [0002] Polyethylene terephthalate is an important class of polyester, which is widely used in various fields, such as polyethylene terephthalate due to its good fiber-forming properties, good mechanical properties, wear-resistant It is widely used in the processing and production of materials such as engineering plastics and mechanical parts because of its high performance, creep resistance and electrical insulation. [0003] At present, the prior art discloses various preparation methods of poly(ethylene terephthalate), such as synthesizing poly(ethylene terephthalate) by using terephthalic acid and glycol. Among them, the molecular formula of terephthalic acid as one of the raw materials is C 8 h 6 o 4 , with a molecular weight of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/42C08G63/78
Inventor 周光远姜敏苏小龙刘茜张强
Owner 芜湖万隆新材料有限公司
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