Copolyester as well as preparation method and application thereof

A technology of copolyester and polyethylene glycol, applied in the direction of single-component copolyester rayon, etc., can solve the problems of high lightness value and increased production cost, achieve good dyeability, reduce equipment investment and operation cost Effect

Inactive Publication Date: 2011-04-27
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patents CN101063236A and CN1534114A disclose the method of forming polyester only by copolymerizing with glycols with side chains. Although the dyeing performance is improved, the lightness value L* after dyeing is still high
Patent JK56-26006 discloses a modified polyester fiber to improve dyeability by adding sulfonic acid groups and polyethylene glycol monomers to the polyester, but the fibers made of this type of polyester are used The dyes need to be upgraded from general disperse dyes to cationic reactive dyes, resulting in increased production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add bishydroxyethyl terephthalate into the esterification reaction tank, keep the temperature at 250°C and the pressure at 1.2×10 5 Pa, 8.25kg of TPA and 3.54kg of EG slurry were gradually added to the esterification reaction layer within 4 hours, and then the esterification reaction was carried out for 1 hour. Finally, 10.2 kg was taken from the obtained esterification reaction product and added to the polycondensation reaction layer.

[0020] Keep the esterification reaction product at 250°C under normal pressure, add 1 wt% PEG1000 equivalent to polyester and stir for five minutes, then add MPO equivalent to 10mol% of all diol components in the obtained polyester and stir for 30 minutes. Then add phosphoric acid with a phosphorus atomic weight equivalent to 18 ppm of the polymer, 5 minutes later add antimony trioxide with an antimony atomic weight equivalent to 230 ppm of the polymer, and cobalt acetate with a cobalt atomic weight equivalent to 15 ppm of the polymer. ...

Embodiment 2

[0036] PEG1000 is changed into PEG4000, and all the other conditions are the same as in Example 1. The L* value measured after dyeing the prepared tubular knitted fabric at a dyeing temperature of 95° C. was 25.7.

Embodiment 3

[0038] Change PEG1000 into PEG10000, and all the other conditions are the same as in Example 1. The L* value measured after dyeing the prepared tubular knitted fabric at a dyeing temperature of 95° C. was 28.1.

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PUM

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Abstract

The invention discloses copolyester and a preparation method and application thereof. The copolyester comprises binary acid components and binary alcohol components, wherein in the binary acid components, the content of the terephthalic acid structural unit is more than 90mol%; and in the binary alcohol components, the content of the ethylene glycol structural unit is 70-99mol%, and the content of the aliphatic dihydric alcohol structural unit which contains side chains and less than 6 carbon atoms is 1-30mol%. The copolyester also comprises a polyethylene glycol structural unit. Because the aliphatic dihydric alcohol structural unit which contains side chains and less than 6 carbon atoms and the polyethylene glycol structural unit are added to the copolyester, the copolyester can be made into fiber with the known method, and the fiber can be made into fabric. The prepared finished product has good dyeing property on disperse dye at normal temperature and pressure, thus the high equipment investment and operation cost resulted from high-temperature and high-pressure dying can be reduced.

Description

technical field [0001] The invention relates to a copolyester and its preparation method and application, in particular to the polyester prepared by copolymerizing with an aliphatic dihydric alcohol monomer with a side chain and a carbon number of 6 or less. Background technique [0002] Polyethylene terephthalate in polyester has outstanding properties and is widely used in the fields of fibers and films, especially in the fields of clothing and industrial materials. [0003] There are many dyeing methods for polyester fibers according to different uses, but ordinary polyester has structural characteristics such as tight molecular chains and high crystallinity, which makes it not easy to dye like natural fibers. When dyeing with disperse dyes, it needs 130 ° C high temperature and high pressure. Dyeing under the conditions of high temperature and high pressure will not only increase equipment investment, but also increase operating costs. [0004] The subject of improving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672D01F6/84
CPCD01F6/84C08G63/672C08G63/183C08L67/02
Inventor 吴亚薇杨娟青山雅俊
Owner TORAY FIBER RES INST(CHINA) CO LTD
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