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Method for dyeing modified polyester

A technology for modifying polyester and dyeing methods, applied in dyeing methods, textiles and papermaking, etc., can solve the problems of harsh operating conditions, unfavorable promotion and use, inability to achieve dyeing, etc. The effect of improving the elongation at break

Active Publication Date: 2010-12-08
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the actual operating conditions of this process are harsh, and it has a strong selectivity for dyes. It can only be used for some medium and light colors, and a low amount of dyes can be used to achieve staining effects on polyester-cotton fabrics, but it is impossible to achieve real dyeing. In addition, this process The chromatogram used is narrow, which is not conducive to popularization and use
Under the current circumstances, carrier-free dyeing below 100°C cannot be achieved for ordinary polyester, and some modified polyesters can be dyed without carrier below 100°C.

Method used

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  • Method for dyeing modified polyester
  • Method for dyeing modified polyester
  • Method for dyeing modified polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] The preparation of embodiment 1 modified polyester

[0073] 1) transesterification reaction

[0074] Add 800g of dimethyl terephthalate and 521g of ethylene glycol, 15g of diol and 25g of butanediol into the reaction kettle, then add 0.12g of tetrabutyl titanate as a catalyst to carry out transesterification reaction at 220°C, the reaction time For 40 minutes, when the fraction reaches 98% of the theoretical amount, the transesterification reaction is terminated to obtain the transesterification reaction product;

[0075] 2) Copolymerization reaction

[0076] Add 0.25g of tetrabutyl titanate polycondensation catalyst to the transesterification reaction product obtained in step 1), then raise the temperature to 230°C, add 63.4g of nylon 6 polymer with a relative viscosity of 1.5 for copolymerization reaction, when the temperature reaches 240°C , pump a high vacuum, keep the vacuum at 30Pa, continue to heat up to 255°C, and react for 5 hours. When the intrinsic viscosit...

Embodiment 2

[0077] The preparation of embodiment 2 modified polyester

[0078] 1) transesterification reaction

[0079] Add 600g of dimethyl terephthalate, 400g of ethylene glycol and 21g of propylene glycol into the reactor, then add 0.13g of tetrabutyl titanate as a catalyst to carry out transesterification reaction at 160°C, the reaction time is 90 minutes, and the fraction When reaching 98% of theoretical amount, end transesterification reaction, obtain transesterification reaction product;

[0080] 2) Copolymerization reaction

[0081] Add 0.26g of tetrabutyl titanate polycondensation catalyst to the transesterification reaction product obtained in step 1), then raise the temperature to 230°C, add 66.1g of nylon 6 polymer with a relative viscosity of 2.2 for copolymerization reaction, when the temperature reaches 250°C , pump a high vacuum, keep the vacuum at 100Pa, continue to heat up to 260°C, and react for 6 hours. When the intrinsic viscosity reaches 0.90dL / g, the material is d...

Embodiment 3

[0082] The preparation of embodiment 3 modified polyester

[0083] 1) transesterification reaction

[0084] Add 970g of dimethyl terephthalate, 682g of ethylene glycol and 19g of propylene glycol into the reaction kettle, then add 0.50g of tetrabutyl titanate as a catalyst to carry out transesterification reaction at 170°C, the reaction time is 60 minutes, and the fraction When reaching 98% of theoretical amount, end transesterification reaction, obtain transesterification reaction product;

[0085] 2) Copolymerization reaction

[0086] Add 0.34g of tetrabutyl titanate polycondensation catalyst to the transesterification product obtained in step 1), then raise the temperature to 230°C, add 168.3g of nylon 6 polymer with a relative viscosity of 1.7 for copolymerization, when the temperature reaches 248°C , pump high vacuum, keep the vacuum degree at 60Pa, continue to heat up to 256°C, and react for 6.5 hours. When the intrinsic viscosity reaches 0.88dL / g, the material is disc...

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Abstract

The invention relates to a method for dyeing modified polyester. The modified polyester has the performances of dyeing with an acid dye and a disperse dye at normal temperature. By dyeing the modified polyester with a weak acid dye under the environment that the pH value is 2-6, the dye-uptake rate can reach over 70 percent and the color fastness can reach over 3-4 grades. In addition, in the invention, the modified polyester is dyed with the disperse dye at normal temperature. The dyeing process has no requirement on the kinds of the disperse dyes and complete color spectrum; and by dyeing with carrier-free assistants at normal temperature and normal pressure, the dyeing-uptake rate can reach over 90 percent and the color fastness can reach over 4 grades. In addition, the dyeing process is simple and controllable and is beneficial to being popularized and applied.

Description

technical field [0001] The invention relates to a polyester dyeing method, in particular to a modified polyester dyeing method. Background technique [0002] As the basic industry of the textile industry, chemical fiber has always been a key industry in my country's planned development. In recent years, my country's chemical fiber production has developed rapidly, and its production capacity has accounted for 1 / 3 of the world's chemical fiber production, of which polyester production accounts for 1 / 2 of the world's production, ranking first in the world, and the production capacity is still developing at a high speed. my country has become the world's polyester center of development. Wherein polyester staple fiber has been used more and more for blending with wool etc. since it appeared on the market, for preparing wool polyester worsted fabrics. With the increasing use of polyester staple fiber in the preparation of wool and polyester fabrics, it is of great practical sign...

Claims

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Application Information

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IPC IPC(8): D06P3/24D06P3/26D06P1/39D06P1/16
Inventor 廉志军潘菊芳刘伯林
Owner CHINESE TEXTILE ACAD
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