Aromatic polyester-aliphatic polyester block copolyester and preparing method thereof

An aromatic polyester and polyester block technology, applied in the polymer field, can solve the problem of little contribution to the dimensional stability of polyester fibers, and achieve good product quality stability, low glass transition temperature, and large disperse dyes. Effect of Molecular Diffusion Coefficient

Active Publication Date: 2017-04-26
CHINA TEXTILE ACADEMYTIANJINSCI & TECH DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this invention discloses the structure of aromatic polyester-aliphatic polyester, it is added to polyester fiber as a modifier, although it has a certain effect on dyeing performance, it does not contribute much to the dimensional stability of polyester fiber

Method used

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  • Aromatic polyester-aliphatic polyester block copolyester and preparing method thereof
  • Aromatic polyester-aliphatic polyester block copolyester and preparing method thereof
  • Aromatic polyester-aliphatic polyester block copolyester and preparing method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0062] Prepare aromatic polyester-aliphatic polyester block copolyester according to the preparation method provided by the invention, the steps are as follows:

[0063] (1) adding an appropriate amount of catalyst to a mixture of terephthalic acid and ethylene glycol with a molar ratio of 1:1.15 to prepare a slurry;

[0064] (2) The slurry prepared in step (1) is continuously added to the esterification system composed of the first vertical esterification kettle and the second vertical esterification kettle for esterification reaction, and the reaction temperature of the first esterification kettle is 265°C, the reaction pressure is 200kPa, the reaction temperature of the second esterification tank is 270°C, and the reaction pressure is 150kPa. When the degree of polymerization of the ethylene terephthalate oligomer reaches 6, the oligomer is continuously and stably extracted from the esterification tank by the oligomer pump;

[0065] (3) After passing the ethylene terephtha...

Embodiment 2

[0069] Prepare aromatic polyester-aliphatic polyester block copolyester according to the preparation method provided by the invention, the steps are as follows:

[0070] (1) adding an appropriate amount of catalyst to a mixture of terephthalic acid and ethylene glycol with a molar ratio of 1:1.15 to prepare a slurry;

[0071] (2) The slurry prepared in step (1) was continuously added to an esterification system composed of a vertical esterification tank for esterification reaction, wherein the reaction temperature of the esterification tank was 250° C. and the reaction pressure was 200 kPa. When the degree of polymerization of ethylene terephthalate reaches 2, the oligomer is continuously and stably extracted from the esterification kettle by the oligomer pump;

[0072] (3) After the ethylene terephthalate oligomer prepared in step (2) is adjusted to 220°C through a heat exchanger, it is mixed with polysuccinic acid-1,2- The propylene glycol ester polyol is mixed evenly by th...

Embodiment 3

[0076] Prepare aromatic polyester-aliphatic polyester block copolyester according to the preparation method provided by the invention, the steps are as follows:

[0077] (1) Add an appropriate amount of catalyst to a mixture of terephthalic acid and ethylene glycol with a molar ratio of 1:2 to prepare a slurry;

[0078] (2) The slurry prepared in step (1) was continuously added to an esterification system composed of a vertical esterification tank for esterification reaction, wherein the reaction temperature of the esterification tank was 240° C. and the reaction pressure was 100 kPa. When the degree of polymerization of ethylene terephthalate reaches 1, the oligomer is continuously and stably extracted from the esterification tank by the oligomer pump;

[0079] (3) After passing the ethylene terephthalate oligomer prepared in step (2) through a heat exchanger to adjust the temperature to 250° C. Alcohol ester polyols are uniformly mixed through a tubular static mixer, and th...

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Abstract

The invention discloses an aromatic polyester-aliphatic polyester block copolyester and a preparing method thereof. The copolyester is formed by polyethylene terephthalate oligomer and aliphatic polydiol diester polyhydric alcohol through condensation polymerization, the randomness degree of the copolyester is smaller than or equal to 0.05 and is larger than or equal to 0.95, the intrinsic viscosity is 0.5-1.2 dL/g, the melting point is 160-250 DEG C, the glass transition temperature is 40-77 DEG C, the hue B value is 1-8, and the content of diglycol is smaller than or equal to 1.5%. The aromatic polyester-aliphatic polyester block copolyester is excellent in hue, and spun fiber has excellent disperse dye constant-pressure dyeing performance and size stability. The preparing method is low in energy consumption, high in production efficiency, high in quality stability and easy to achieve large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to an aromatic polyester-aliphatic polyester block copolyester and a preparation method thereof. Background technique [0002] Polyester fiber has the advantages of high breaking strength, stable shape, good crispness, anti-wrinkle and non-ironing, easy to wash and dry, and is an ideal textile fiber. These excellent physical and mechanical properties of polyester fiber depend on its highly stereoregular macromolecular chain structure and condensed structure with high crystallinity and orientation, but these structural properties also bring the problem of difficult dyeing to polyester fiber . [0003] There are only less polar ester groups in the molecular structure of polyester fibers, and lack of active groups that can bond with dyes, so they can only be dyed with disperse dyes. Disperse dyes are non-ionic dyes with large molecular size and low water solubility. At the same time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/16C08G63/91D01F6/84D06P3/54
CPCC08G63/16C08G63/183C08G63/916D01F6/84D06P3/54
Inventor 邱志成金剑李志勇王颖廉志军刘玉来赵亮王雪
Owner CHINA TEXTILE ACADEMYTIANJINSCI & TECH DEV CO LTD
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