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A kind of preparation method of cationic modified copolyester with high fluidity

A high-fluidity, cationic technology, applied in the field of polyester preparation, can solve the problems of poor fluidity of cation-modified copolyester, and achieve the effect of reducing the difficulty of the reaction and improving the flow performance.

Active Publication Date: 2020-08-25
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is in order to overcome the problems existing in the above-mentioned prior art, provide a kind of preparation method of cationic modified copolyester with high fluidity, fundamentally solve the problem of poor fluidity of cationic modified copolyester

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A kind of preparation method of cationic modified copolyester with high fluidity, concrete steps are as follows:

[0073] (1) configure slurry;

[0074] Mix and beat ethylene glycol, terephthalic acid, pyromellitic anhydride and a titanium-based composite catalyst to prepare a slurry, wherein the titanium-based composite catalyst is obtained by compounding tetrabutyl titanate supported on silica and cobalt acetate Yes, the stirring rate of mixing and beating is 10rpm, the time is 0.8h, the molar ratio of ethylene glycol to terephthalic acid is 1.1:1, and the addition amount of pyromellitic anhydride is 4.3% of the terephthalic acid mole fraction, The addition amount of the titanium series composite catalyst is 30ppm of the terephthalic acid mass, and the molar ratio of tetrabutyl titanate, silicon dioxide and cobalt acetate in the titanium series composite catalyst is 1:0.8:3;

[0075] (2) Esterification reaction;

[0076] The slurry is subjected to an esterification ...

Embodiment 2

[0082] A kind of preparation method of cationic modified copolyester with high fluidity, concrete steps are as follows:

[0083] (1) configure slurry;

[0084] A mixture of ethylene glycol and butanediol (mass ratio of 3:1), isophthalic acid, cyclopentane tetra-acid dianhydride and a titanium composite catalyst is mixed and beaten to prepare a slurry, wherein the titanium composite catalyst is two It is obtained by loading metatitanic acid on silica and compounding it with cobalt acetate. The stirring rate of mixing and beating is 18rpm, the time is 0.8h, the molar ratio of the mixture of ethylene glycol and butanediol to isophthalic acid is 1.11, cyclopentane The addition of tetra-acid dianhydride is 0.8% of the mole fraction of isophthalic acid, the addition of titanium series composite catalyst is 250ppm of the quality of isophthalic acid, the amount of metatitanic acid, silicon dioxide and cobalt acetate in the titanium series composite catalyst The molar ratio is 1:1:8; ...

Embodiment 3

[0092] A kind of preparation method of cationic modified copolyester with high fluidity, concrete steps are as follows:

[0093] (1) configure slurry;

[0094] The mixture of ethylene glycol and propylene glycol (mass ratio is 1:2), terephthalic acid, benzophenone tetraic acid dianhydride and titanium composite catalyst are mixed and beaten to prepare a slurry, wherein the titanium composite catalyst is made of silica The titanium-silicon composite catalyst loaded with tetrabutyl titanate is compounded with cobalt acetate. The stirring rate of mixing and beating is 22rpm, and the time is 0.5h. The molar ratio of the mixture of ethylene glycol, propylene glycol and butylene glycol to terephthalic acid is 1.8:1, the addition amount of benzophenone tetra-acid dianhydride is 2.2% of the terephthalic acid mole fraction, the addition amount of the titanium series composite catalyst is 200ppm of the terephthalic acid quality, and the titanium series composite catalyst tetratitanate ...

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Abstract

The invention relates to a preparation method of high-flowability positive ion modified copolyester. Binary acid I, dihydric alcohol I and high-flowability branched structure modifiers are uniformly mixed and then subjected to esterification reaction, and isophthalic acid-5-sodium sulfonate and dihydric alcohol II esterification products are led in after esterification reaction and subjected to pre-condensation reaction and final polycondensation reaction to prepare the high-flowability positive ion modified copolyester. The high-flowability branched structure modifiers are more than one of pyromellitic anhydride, cyclopentane tetracarboxylic anhydride, benzophenone tetracarboxylic dianhydride, trimellitic anhydride, mellophanic dianhydride, pyromellitic acid, cyclopentane tetracid, benzophenone tetracid, trimellitic acid and mellophanic acid, and the dihydric alcohol II is more than one of butanediol, pentanediol, hexanediol, heptanediol, octylene glycol, nonanediol and decanediol. Two modified components are introduced, so that flow-activation energy is remarkably reduced, acting force of the copolyester and tube walls in the flowing process is reduced, and melt viscosity loss iseffectively controlled.

Description

technical field [0001] The invention belongs to the field of polyester preparation and relates to a preparation method of cationic modified copolyester with high fluidity. Background technique [0002] Polyester refers to the general term for polymers obtained by polycondensation of polyols and polybasic acids, mainly referring to polyethylene terephthalate (PET), and customarily including polybutylene terephthalate (PBT) and polyarylate Isolinear thermoplastic resins are a class of polymers with excellent performance and a wide range of uses, and have been widely used in the fields of fibers, plastics and films. With the diversified demand for clothing fiber products, the development of new polyester fiber materials is becoming more and more urgent. [0003] Due to the high degree of regularity and high crystallinity of the molecular chain arrangement of polyester, and the lack of groups that can effectively adsorb small molecules such as dyes, it needs to be dyed under hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/688C08G63/85C08G63/82
CPCC08G63/6884C08G63/826C08G63/85
Inventor 王华平吉鹏陈烨陈仕艳张圣明刘嘉茜
Owner DONGHUA UNIV
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