Preparation method of high-temperature leveling agent for polyester dyeing

A technology of high-temperature leveling agent and polyester, which is applied in the field of polyester dyeing leveling agent, can solve the problems of good dispersion and insufficient dye migration, and achieve the effect of simple preparation process steps, avoiding the problem of color flower, and improving dye migration

Active Publication Date: 2022-06-03
浙江联胜新材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a preparation method of a high-temperature leveling agent for polyester dyeing, to solve the above-mentioned existing high-temperature leveling agent with good dispersibility and insufficient dye migration

Method used

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  • Preparation method of high-temperature leveling agent for polyester dyeing
  • Preparation method of high-temperature leveling agent for polyester dyeing
  • Preparation method of high-temperature leveling agent for polyester dyeing

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Add pyromellitic dianhydride to n-butylamine and part of polyethylene glycol 400, keep the temperature at 70°C for 4h to carry out ring-opening amidation and esterification; under nitrogen atmosphere, heat up to 130°C , under the condition of vacuum degree -0.1MPa, dehydration ring-closure reaction is carried out for 6h to obtain N-n-butyl-4-carboxy-5-polyethylene glycol ester-phthalimide; among them, pyromellitic acid The molar ratio of dianhydride to n-butylamine is 1:1.05; the molar ratio of pyromellitic dianhydride to polyethylene glycol 400 is 1:1.05;

[0030] (2) N-n-butyl-4-carboxy-5-polyethylene glycol ester group-phthalimide obtained in step (1) and remaining polyethylene glycol 400 are used in catalyst methanesulfonic acid Under the nitrogen atmosphere, the temperature was raised to 140 ° C, and the dehydration esterification reaction was carried out under the condition of vacuum degree -0.1 MPa for 7 h to obtain N-n-butyl-4,5-dipolyethylene glycol ester-p...

Embodiment 2

[0032] (1) Add pyromellitic dianhydride to n-pentylamine and part of polyethylene glycol 600, keep at 80°C for 3h to carry out ring-opening amidation and esterification; under nitrogen atmosphere, heat up to 140°C , under the condition of vacuum degree -0.09MPa, dehydration and ring-closure reaction were carried out for 5h to obtain N-n-pentyl-4-carboxy-5-polyethylene glycol ester-phthalimide; among them, pyromellitic acid The molar ratio of dianhydride to n-amylamine is 1:1.1; the molar ratio of pyromellitic dianhydride to polyethylene glycol 600 is in the range of 1:1.1;

[0033] (2) N-n-pentyl-4-carboxy-5-polyethylene glycol ester group-phthalimide obtained in step (1) and residual polyethylene glycol 600 are reacted with catalyst methanesulfonic acid Under the nitrogen atmosphere, the temperature was raised to 150 ° C, and the dehydration esterification reaction was carried out under the condition of vacuum degree -0.09 MPa for 6 h to obtain N-n-pentyl-4,5-dipolyethylene g...

Embodiment 3

[0035] (1) Add pyromellitic dianhydride to n-hexylamine and part of polyethylene glycol 800, keep the temperature at 90°C for 2h to carry out ring-opening amidation and esterification; under nitrogen atmosphere, heat up to 150°C, Under the condition of vacuum degree -0.08MPa, dehydration and ring closure reaction was carried out for 4h to obtain N-n-hexyl-4-carboxy-5-polyethylene glycol ester-phthalimide; among them, pyromellitic dianhydride The molar ratio to n-hexylamine is 1:1.15; the molar ratio range of pyromellitic dianhydride to polyethylene glycol 800 is 1:1.15;

[0036] (2) N-n-hexyl-4-carboxy-5-polyethylene glycol ester base-phthalimide obtained in step (1) and remaining polyethylene glycol 800 under the effect of catalyst methanesulfonic acid , in a nitrogen atmosphere, the temperature was raised to 160 ℃, and the dehydration esterification reaction was carried out under the condition of vacuum degree -0.08MPa for 5h to obtain N-n-hexyl-4,5-dipolyethylene glycol est...

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Abstract

The invention discloses a preparation method of a high-temperature leveling agent for polyester dyeing. The preparation method comprises the following steps: adding pyromellitic dianhydride into alkylamine and part of polyethylene glycol to carry out ring-opening amidation and esterification reaction; carrying out dehydration ring-closure reaction in a nitrogen atmosphere, so as to obtain N-alkyl-4-carboxyl-5-polyethylene glycol ester group-phthalimide; and carrying out dehydration esterification reaction on the N-alkyl-4-carboxyl-5-polyethylene glycol ester-phthalimide and the residual polyethylene glycol for 4-7 hours under the action of a catalyst methanesulfonic acid in a nitrogen atmosphere to obtain the product. According to the preparation method of the high-temperature leveling agent for polyester dyeing, which adopts the structure, the prepared high-temperature leveling agent for polyester dyeing has excellent dispersion and migration capacities on disperse dyes, and has a certain puffing effect on polyester fibers, so that the migration property of the dyes is further improved; the dye is easier to diffuse and uniformly migrate from the dye liquor to the interior of the fiber, and the problem of dyeing defects in the dyeing process is avoided.

Description

technical field [0001] The invention relates to the technical field of a polyester dyeing leveling agent, in particular to a preparation method of a high-temperature leveling agent for polyester dyeing. Background technique [0002] Polyester fiber has excellent properties and has a wide range of applications. Its excellent properties make it one of the fastest-growing and highest-yielding varieties of synthetic fibers. Due to the high crystallinity, orientation and glass transition temperature of polyester fibers, the molecular structure lacks the active groups that cellulose or protein fibers have that can be combined with dyes. Therefore, polyester has higher requirements for dyeing conditions. Usually, disperse dyes are used for high temperature and high pressure dyeing at 130 ° C and pH 5-6. [0003] Disperse dyes are a class of non-ionic dyes with low solubility in water and high dispersibility. Dyes are usually mixed with dispersants and are suspended in water. Acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/607D06P1/16D06P3/54C08G65/333C08G65/332
CPCD06P1/6073D06P1/16D06P3/54C08G65/3326C08G65/33306
Inventor 蔡润之涂胜宏
Owner 浙江联胜新材股份有限公司
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