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A kind of hydrophilic polyester and preparation method thereof

A water-polyester and hydrophilic technology, applied in the field of polymers, can solve the problems of large viscosity drop and easy yellowing of hydrophilic polyesters, and achieve low production energy consumption, good product quality stability, and improved stability. Effect

Active Publication Date: 2020-07-03
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

The invention uses non-toxic and environment-friendly titanium metal alkoxide as a catalyst, and under the synergistic effect of end-capping agent polyhydroxy compound, stabilizer phosphorus compound, hindered phenol compound and acetate, it solves the problems of easy yellowing of hydrophilic polyester, The problem of large viscosity drop during molding processing

Method used

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  • A kind of hydrophilic polyester and preparation method thereof
  • A kind of hydrophilic polyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Prepare hydrophilic polyester according to the preparation method provided by the invention, the steps are as follows:

[0048] (1) Terephthalic acid and ethylene glycol are prepared into a slurry according to a molar ratio of 1:1.15;

[0049] (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. The reaction temperature of the first esterification kettle is The reaction temperature of the second esterification tank is 265°C and the reaction pressure is 120kPa. When the degree of polymerization of the ethylene terephthalate oligomer reached 5, the oligomer was continuously and stably extracted from the esterification kettle by the oligomer pump;

[0050] (3) After the ethylene terephthalate oligomer prepared in step (2) is adjusted to 235° C. through a heat exchanger, it is mixed with polyethylene glycol and di...

Embodiment 2

[0054] Prepare hydrophilic polyester according to the preparation method provided by the invention, the steps are as follows:

[0055] (1) Terephthalic acid and ethylene glycol are prepared into a slurry according to a molar ratio of 1:1.05;

[0056] (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. The reaction temperature of the first esterification kettle is The reaction temperature of the second esterification tank is 275°C and the reaction pressure is 200kPa. When the degree of polymerization of the ethylene terephthalate oligomer reaches 8, the oligomer is continuously and stably extracted from the esterification tank by the oligomer pump;

[0057] (3) After the ethylene terephthalate oligomer prepared in step (2) is adjusted to 250°C through a heat exchanger, it is mixed with polyethylene glycol with a mole...

Embodiment 3

[0061] Prepare hydrophilic polyester according to the preparation method provided by the invention, the steps are as follows:

[0062] (1) Terephthalic acid and ethylene glycol are prepared into a slurry according to a molar ratio of 1:2.0;

[0063] (2) The slurry prepared in step (1) is continuously added to the esterification system composed of a vertical esterification tank for esterification reaction. The reaction temperature of the esterification tank is 240 ° C and the reaction pressure is 100 kPa. When the degree of polymerization of the ethylene glycol diformate oligomer reaches 1, the oligomer is continuously and stably taken out from the esterification kettle by the oligomer pump;

[0064] (3) After the ethylene terephthalate oligomer prepared in step (2) is adjusted to 200°C through a heat exchanger, it is mixed with polyethylene glycol and glycerol / phosphorous acid with a molecular weight of 200 added online Triphenyl ester / N,N'-bis-(3-(3,5-di-tert-butyl-4-hydroxy...

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Abstract

The invention belongs to the technical field of macromolecules, and particularly discloses hydrophilic polyester and a preparation method thereof. The hydrophilic polyester is prepared by polymerizingethylene glycol terephthalate oligomer and polyether glycol under the synergistic action of titanium alcohol salt, polyhydroxy compound, phosphorus compound, sterically hindered phenol compound and acetate. The hydrophilic polyester has the characteristics that the catalyzing function of titanium alcohol salt to side reaction is inhibited by the multiple stabilizer system; the easiness in yellowing is avoided, and the reduction of intrinsic viscosity in the forming process is little; the green and environment-friendly effects are realized, any heavy metal pollution is avoided, the color phaseis excellent, and the spinnability and heat stability are good.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a hydrophilic polyester 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. However, due to the high regularity of polyester molecular chains, the lack of hygroscopic groups such as hydroxyl groups and amino groups, there are only ester groups with low polarity; these structural characteristics not only endow polyester fibers with excellent mechanical properties, but also give polyester fibers It has brought disadvantages such as low hygroscopicity and wet feeling when wearing the fabric, which greatly reduces its wearing comfort. Therefore, improving the hydrophilic properties of polyester fibers and improving the moisture permeability of their fabrics is one of the important directions in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/668C08G63/85C08K5/527C08K5/20C08K5/098C08K5/13C08K5/526C08K5/134
CPCC08G63/668C08G63/85C08K5/098C08K5/13C08K5/1345C08K5/20C08K5/526C08K5/527
Inventor 邱志成钟淑芳李志勇金剑刘玉来杨喆陈伟
Owner CHINA TEXTILE ACADEMYTIANJINSCI & TECH DEV CO LTD
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