Cationic dyeable polyester composition as well as preparation method and application thereof

A composition, cationic technology, applied in the direction of one-component copolyester rayon, etc., can solve the problems of affecting the dyeing properties of modified polyester, low molecular weight of polyester, poor polyester reactivity, etc., and achieve low carboxyl group content. , Good hydrolysis resistance, easy dyeing effect

Pending Publication Date: 2022-06-03
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the cationic group is mainly connected to the end of the molecular weight, the dyeing performance of the modified polyester is affected. At the same time, the cationic component is generally added to block the end of the polyester, resulting in poor reactivity of the polyester. The molecular weight of the obtained polyester is not large, and there is a problem of low strength.

Method used

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  • Cationic dyeable polyester composition as well as preparation method and application thereof
  • Cationic dyeable polyester composition as well as preparation method and application thereof
  • Cationic dyeable polyester composition as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

The terephthalic acid (PTA) and ethylene glycol (EG) were mixed uniformly and put into the reaction kettle, and the esterification reaction was carried out at 240°C. After the esterification reaction, the reaction product was transferred into a polycondensation kettle, and sebacic acid, antimony trioxide as a catalyst, trimethyl phosphate and lithium acetate as heat stabilizers were added before the polymerization reaction, and the polycondensation reaction was carried out at 290°C. The ethylene glycol solution of the sulfonate shown in formula 2 is added 30 minutes after the start of the polymerization reaction, and after the polymer reaches the required viscosity, it is spit out and diced to obtain the required polyester composition.

[0057]After the polyester product obtained by polycondensation is pre-crystallized, the reaction temperature is 230 ° C, the reaction pressure is 50 Pa, and the reaction time is 30 hours. The viscosity IV was 0.65 dl / g.

[0058] The polyester ...

Embodiment 2

The terephthalic acid (PTA) and ethylene glycol (EG) were mixed uniformly and put into the reaction kettle, and the esterification reaction was carried out at 240°C. After the esterification reaction, the reaction product was transferred into a polycondensation kettle, and sebacic acid, antimony trioxide as a catalyst, trimethyl phosphate and lithium acetate as heat stabilizers were added before the polymerization reaction, and the polycondensation reaction was carried out at 290°C. The ethylene glycol solution of the sulfonate shown in formula 2 is added 30 minutes after the start of the polymerization reaction, and after the polymer reaches the required viscosity, it is spit out and diced to obtain the required polyester composition.

[0060] After the polyester product obtained by polycondensation is pre-crystallized, the reaction temperature is 230 ° C, the reaction pressure is 50 Pa, and the reaction time is 30 hours. The viscosity IV was 0.65 dl / g.

[0061] The polyester...

Embodiment 3

The terephthalic acid (PTA) and ethylene glycol (EG) were mixed uniformly and put into the reaction kettle, and the esterification reaction was carried out at 240°C. After the esterification reaction, the reaction product was transferred into a polycondensation kettle, and sebacic acid, antimony trioxide as a catalyst, trimethyl phosphate and lithium acetate as heat stabilizers were added before the polymerization reaction, and the polycondensation reaction was carried out at 290°C. The ethylene glycol solution of the sulfonate shown in formula 2 is added 30 minutes after the start of the polymerization reaction, and after the polymer reaches the required viscosity, it is spit out and diced to obtain the required polyester composition.

[0063] After the polyester product obtained by polycondensation is subjected to pre-crystallization treatment, solid-phase polymerization is carried out under the conditions that the reaction temperature is 230 ° C, the reaction pressure is 50 P...

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PUM

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Abstract

The invention discloses a cationic dyeable polyester composition and a preparation method thereof. The cationic dyeable polyester composition is mainly composed of an aromatic dicarboxylic acid structural unit and an aliphatic dihydric alcohol structural unit, and contains a sulfonate group as shown in a formula 1 (formula 1), the content of the group as shown in the formula 1 accounts for 1000-5000 ppm of the total amount of the polyester composition in terms of sulfur element, and the cationic dyeable polyester composition also contains the aliphatic dicarboxylic acid structural unit. The cationic dyeable polyester composition is good in physical property, easy to dye, good in hydrolysis resistance and excellent in strength retention rate after dyeing.

Description

technical field [0001] The present invention relates to a cationic dyeable polyester composition, in particular to a polyester composition containing end-blocked sulfonate groups and aliphatic dicarboxylic acid structural units. Background technique [0002] Due to its excellent mechanical and chemical properties, polyester resins are widely used in clothing, industrial fibers, tapes, films for surface coatings, tire radials, mesh cables and other industrial fields. [0003] When used as clothing fibers, in order to improve the dyeability of polyester, isophthalic acid components containing sulfonate groups, such as sodium isophthalate-5-sulfonate, are used as comonomers to prepare copolymerization modified Sex cationic dyeable polyester. However, the sulfonate group is prone to physical crosslinking in polyester, resulting in a significant increase in the melt viscosity of polyester when the intrinsic viscosity (IV) is not high, resulting in lower strength of the resulting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/688C08G63/80D01F6/84
CPCC08G63/6926C08G63/80D01F6/84
Inventor 祁华胡永佳望月克彦
Owner TORAY FIBER RES INST(CHINA) CO LTD
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