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Alkaline soluble polyester and preparation method thereof

A technology of alkali-soluble polyester and polyester, applied in the field of polyester with alkali water solubility and its preparation, can solve the problem of increasing the internal rotation activation energy of macromolecules, reducing the movement capacity of macromolecular chains, and increasing molecular chain entanglement points and other problems, to achieve the effect of excellent spinning operability, uniform and continuous spinning, and shortened polycondensation time

Inactive Publication Date: 2008-03-12
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of adding isophthalic acid-5-sulfonate or bishydroxyethyl isophthalate-5-sulfonate is to make the product meet the requirements of alkali solubility, but it also brings negative effects: the introduction of bonds on macromolecules The benzene ring structure and the steric hindrance effect of the sulfonic acid group increase the internal rotation activation energy of the macromolecule; at the same time, the polarity of the sulfonic acid group increases the entanglement point of the molecular chain, which reduces the movement capacity of the macromolecular chain , which restricts the regular arrangement of macromolecular segments, reduces its crystallization ability, and sharply increases the melt viscosity
Add polyethylene glycol, if too much is added, the polymer will contain severe bubbles, and the heat resistance will be poor, and the color tone of the polymer will be poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First, 1000 parts by weight of purified terephthalic acid and 430 parts by weight of ethylene glycol are added to the beating kettle, and 0.58 parts by weight of anti-etherification agent sodium acetate is added, and continuously enter the esterification kettle, and carry out esterification under normal pressure at 240°C to 260°C; Until the water effluent terminates the esterification. Then to the polymerization tank, add 96.3 parts by weight of EG solution of ethylene glycol isophthalate-5-sodium sulfonate, add 46.4 parts by weight of 1,6-hexanediol after stirring for several minutes, and add 0.35 parts by weight of catalyst containing Sb compound parts, and 0.23 parts by weight of composite stabilizer IR1010, 0.35 parts by weight of cobalt acetate, and 0.29 parts by weight of phosphoric acid. Under the action of a vacuum pump, keep the vacuum degree below 200Pa to carry out the polymerization reaction, and the temperature is controlled at 270 ° C ~ 280 ° C. , Diced. ...

Embodiment 2

[0026] First, 1000 parts by weight of purified terephthalic acid and 430 parts by weight of ethylene glycol are added to the beating kettle, and 0.58 parts by weight of anti-etherification agent sodium acetate is added, and continuously enter the esterification kettle, and carry out esterification under normal pressure at 240°C to 260°C; Until the water effluent terminates the esterification. Then the polymerization tank, add 192.5 parts by weight of EG solution of ethylene glycol isophthalate-5-sodium sulfonate, add 46.2 parts by weight of adipic acid after stirring for several minutes, and add 0.35 parts by weight of catalyst containing Sb compound, and compound 0.23 parts by weight of stabilizer IR1010, 0.35 parts by weight of cobalt acetate, and 0.29 parts by weight of phosphoric acid. Under the action of a vacuum pump, keep the vacuum degree below 200 Pa to carry out the polymerization reaction, and the temperature is controlled at 270 ° C to 280 ° C.

Embodiment 3

[0028] First, 1000 parts by weight of purified terephthalic acid and 430 parts by weight of ethylene glycol are added to the beating kettle, and 0.58 parts by weight of anti-etherification agent sodium acetate is added, and continuously enter the esterification kettle, and carry out esterification under normal pressure at 240°C to 260°C; Until the water effluent terminates the esterification. Then, add 288.8 parts by weight of EG solution of ethylene glycol isophthalate-5-sodium sulfonate to the polymerization tank, add 23.1 parts by weight of adipic acid after stirring for several minutes, and add 1,6-hexanedioic acid after stirring for several minutes. 23.2 parts by weight of alcohol, and add 0.35 parts by weight of catalyst containing Sb compound, and 0.23 parts by weight of composite stabilizer IR10100, 0.35 parts by weight of cobalt acetate, 0.29 parts by weight of phosphoric acid, under the action of vacuum pump, keep the vacuum degree below 200Pa to carry out polymerizat...

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PUM

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Abstract

The present invention discloses alkali-soluble polyester and the preparation method of the alkali-soluble polyester; the product polyester is polyester terephthalate. A component, B component and or C component are added during the polyester synthesis process, plus a composite stabilizer; in which: A is isophthalic acid glycol ester -5-sodium sulfonate, B aliphatic dibasic acid or correspondent derivative, and C aliphatic diol . The preparation method comprises the etherifying and of polymerization p-phenyl dicarboxylic acid and glycol; During the glycol, isophthalic acid glycol ester-5 -sodium sulfonate, aliphatic dibasic acid or the correspondent derivative as well as composite stabilizer are added. Product obtained by the present invention is of sufficient alkaline hydrolysis, good crystallization as well as excellent spinning maneuverability.

Description

Technical field: [0001] The invention relates to a polyester and a preparation method thereof, which is a polyester with alkali water solubility and a preparation method thereof. Background technique: [0002] Alkali-soluble polyester is a raw material for special fibers such as composite fibers and moisture-wicking fibers. Sea-island fibers are made by compound spinning of alkali-soluble polyester chips, and the alkali-soluble polyester can be dissolved by hot alkaline water treatment to obtain superfine fibers. Alkali-soluble polyester and conventional chips are blended and spun to make hollow fibers, which can be made into hollow microporous fibers after proper alkali treatment, which has good moisture absorption and perspiration properties. Alkali-soluble polyester is also used in adhesives, coatings and other fields, with broad application prospects. [0003] At present, the alkali-soluble polyester used in domestic sea-island fiber composite spinning is mainly import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/78
Inventor 成娟李旭本田圭介
Owner TORAY FIBER RES INST(CHINA) CO LTD
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