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A kind of preparation method containing dianhydrosugar alcohol copolyester

A technology of dianhydrohexitol and polyester, applied in the direction of single-component copolyester rayon, etc., can solve the problems of catalyst sensitivity, low hydroxyl reactivity, and difficulty in obtaining high-molecular copolyester, and achieve Enhanced reactivity, shortened polycondensation reaction time, and better hue of reactants

Active Publication Date: 2014-10-08
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In recent years, there have been some research reports on the copolymerization of isosorbide with terephthalic acid and ethylene glycol, for example: R.Storbeck et al, Makromol.Chem., Vol.194, pp.53-64 (1993) and R.Storbeck et al, Polymer, Vol.34, p.5003 (1993), the research results show that the hydroxyl reactivity of isosorbide is low, it is sensitive to the catalyst in the reaction process, and it is difficult to obtain high molecular copolyester

Method used

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  • A kind of preparation method containing dianhydrosugar alcohol copolyester
  • A kind of preparation method containing dianhydrosugar alcohol copolyester
  • A kind of preparation method containing dianhydrosugar alcohol copolyester

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Experimental program
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Effect test

Embodiment 1

[0040] Put terephthalic acid and ethylene glycol with a molar ratio of 1:1.1, the catalyst antimony acetate and the stabilizer triphenyl phosphite into the mixing device, mix them and add them to the esterification reactor for esterification reaction, the esterification rate After reaching more than 90%, isosorbide dissolved in ethylene glycol is added to the system, the pH value is 8, and the content of isosorbide accounts for 3% of the total amount of terephthalic acid. After uniform mixing, a precondensation reaction is carried out, the reaction temperature is 255° C., the pressure is 900 Pa, and the reaction time is 50 minutes. After the pre-polycondensation reaction, the final polycondensation reaction is carried out. The reaction temperature is 285°C and the pressure is 100Pa. When the melt dynamic viscosity meets the requirements, the material is discharged, extruded, and pelletized. The intrinsic viscosity is 0.6dl / g.

Embodiment 2

[0042] Put terephthalic acid and ethylene glycol with a molar ratio of 1:1.1, the catalyst antimony acetate and the stabilizer triphenyl phosphite into the mixing device, and after mixing, put them into the esterification reactor for esterification reaction, and the esterification rate reaches When it is above 90%, add isosorbide dissolved in ethylene glycol to the system, the content of isosorbide accounts for 10% of the total moles of terephthalic acid, and its pH value is 8. After uniform mixing, a precondensation reaction is carried out, the reaction temperature is 255° C., the pressure is 900 Pa, and the reaction time is 50 minutes. After the pre-polycondensation reaction, the final polycondensation reaction is carried out. The reaction temperature is 290°C and the pressure is 100Pa. When the melt dynamic viscosity meets the requirements, the material is discharged, extruded, and pelletized. The intrinsic viscosity is 0.6dl / g.

Embodiment 3

[0044] Put terephthalic acid and ethylene glycol with a molar ratio of 1:1.1, the catalyst antimony acetate and the stabilizer triphenyl phosphite into the mixing device, and after mixing, put them into the esterification reactor for esterification reaction, and the esterification rate reaches When it is above 90%, add isosorbide dissolved in ethylene glycol to the system, the content of isosorbide accounts for 10% of the total moles of terephthalic acid, and its pH value is 8. After uniform mixing, a precondensation reaction is carried out, the reaction temperature is 255° C., the pressure is 900 Pa, and the reaction time is 50 minutes. After the pre-polycondensation reaction, the final polycondensation reaction is carried out. The reaction temperature is 290°C and the pressure is 100Pa. When the melt dynamic viscosity meets the requirements, the material is discharged, extruded, and pelletized. The intrinsic viscosity is 0.75dl / g.

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Abstract

The invention provides a preparation method for bis-anhydro sugar alcohol contained copolyester. The method comprises the following steps: (1) aromatic binary acid, fatty dihydric alcohol and reaction assistant are esterified after being fully mixed; and (2) when the esterification is implemented until the esterification rate is high above 90%, bis-anhydrohexitol solution is added, and is condensed and polymerized after being fully mixed and reacted in a reaction system so as to obtain bis-anhydrohexitol contained polyester, wherein the intrinsic viscosity of the bis-anhydrohexitol contained polyester is high above 0.6. The method can obtain high-molecular weight polymer copolyester, can satisfy the spinning requirements to meet the demands of clothes fiber material production, can further satisfy the fiber application requirements in the industrial field, and can synchronously apply and develop the high-performance material aspect in the non-fiber field.

Description

technical field [0001] The invention relates to a preparation method of copolyester, in particular to a preparation method of dianhydrohexitol-containing copolyester. Background technique [0002] Polyethylene terephthalate (PET) has been widely used in the fields of synthetic fibers, packaging materials and engineering plastics. Its outstanding feature is that it has excellent heat resistance, electrical insulation, chemical resistance, non-toxic environmental protection and other properties, while low production cost and high cost performance. [0003] In the textile industry, PET is an important synthetic fiber raw material, and its production accounts for more than 70% of the total synthetic fiber production. The development of high-performance PET fiber has made PET more and more widely used in the industrial field. Although it is not as good as aramid fiber and carbon fiber in terms of modulus, strength and heat resistance, they have unique flexibility and cheap price...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/672C08L67/02D01F6/84
Inventor 杨喆钟淑芳李志勇陈伟
Owner CHINESE TEXTILE ACAD
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