A kind of red reactive dye and its application

A technology of reactive dyes and reactive red dyes, applied in the field of fine chemicals, can solve the problems affecting the development of polyamide fibers, the fixation rate is only 70%, and the environmental pollution, etc., and achieves excellent color fastness, high color fastness, and excellent fastness. degree of effect

Active Publication Date: 2017-02-08
SHENYANG RES INST OF CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fabrics dyed with these types of dyes have poor fastness, poor shade, and pollute the environment
After entering the 21st century, due to the constraints of the ecological environment, the requirements for the dyeing rate, color fixation rate, color fastness performance and dyeing wastewater of dyes are getting higher and higher. The above dyes can no longer meet the needs of the development of the times, affecting the polyamide fiber development
[0003] At present, the bulk red reactive dye in the market is C.I. Reactive Red 241, whose structural formula is as follows. It is mainly used for dyeing cotton and viscose fibers. It has high affinity and excellent level dyeing property, and the color fixation rate is only 70%.

Method used

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  • A kind of red reactive dye and its application
  • A kind of red reactive dye and its application
  • A kind of red reactive dye and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Prepare the following dyes:

[0047]

[0048] a) Primary condensation reaction of cyanuric chloride and H acid

[0049] Weigh 1.88 parts of cyanuric chloride, add 18 parts of water and crushed ice, and beat at 0-5°C for 30 minutes. At the same time, weigh 3.41 parts of H acid in 15 parts of water, adjust the pH to 6-7 with sodium carbonate, and dissolve it completely. After the beating is finished, drop the above-mentioned H acid solution into the cyanuric chloride suspension within 1 hour. After the dropwise addition, adjust the pH value of the reaction to 2-3 with sodium carbonate, and react until there is no free H acid, which is the end point.

[0050] b) Secondary condensation reaction

[0051] Weigh 1.21 parts of N-ethylaniline and add it to the above-mentioned primary condensation reaction solution, and at the same time raise the temperature to 35-40°C, adjust the pH value to 5-5.5 with sodium carbonate, and keep the temperature and pH value for about 4 hou...

Embodiment 2、3

[0063] In a method similar to that described in Example 1, respectively select m-beta-hydroxyethylsulfone aniline sulfate and 3-N-ethylaminophenyl (2-sulfonic acid oxygen ethyl) sulfone as raw materials to replace p-beta- Ethylsulfone aniline sulfate, dye 2 and dye 3 can be obtained as shown below:

[0064]

Embodiment 4

[0066] Prepare the following dyes:

[0067]

[0068] The condensation solution obtained in e) of Example 1, that is, the dye (1) solution, was adjusted to pH=10 with sodium hydroxide, and the temperature was kept at 40-50°C for reaction, and the reaction was followed by HPLC until the condensate disappeared. Then adjust the pH=7.0 with 30% hydrochloric acid solution, and dry directly to obtain 17.5 parts of the red reactive dye product of the above-mentioned dye (4).

[0069] Dyeing the above-mentioned dye (4) on polyamide fibers yields a bright red color with a color absorption rate of 98.1% and a color fixation rate of 92.3%.

[0070] The synthesized dye (4) compound was subjected to high resolution mass spectrometry, the calculated molecular weight of the dye was M=1044.04, and the measured molecular weight of the dye was 1044.10. The calculated value is [M-1] / 1=1043.04, and the measured value is 1043.10; the calculated value is [M-2] / 2=521.02, and the measured value is...

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Abstract

The invention belongs to the field of fine chemical engineering and relates to red active dye. The red active dye is a compound with a general structural formula (I) and in the formula, all groups are defined in the specification. The red active dye is mainly used for dyeing and printing of protein fibers, synthetic fibers, cellulose fibers and blended fabrics. After dyeing, the fabric has a gorgeous color, good level-dyeing properties, tone reappearance, very high adhesion ratio and color fixing rate, and excellent color fastness. The red active dye can satisfy environment and ecological protection market requirements on dye.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a red reactive dye and its application. Background technique [0002] Polyamide fiber (commonly known as nylon) is the third largest textile fiber after polyester and cotton fiber, and is also the second largest variety of synthetic fiber, accounting for 22% to 30% of synthetic fiber. Generally, the dyes used for dyeing polyamide fibers are mainly disperse dyes, acid dyes and metal complex dyes. The fabrics dyed with these types of dyes have poor fastness, poor shade, and pollute the environment. After entering the 21st century, due to the constraints of the ecological environment, the requirements for the dyeing rate, color fixation rate, color fastness performance and dyeing wastewater of dyes are getting higher and higher. The above dyes can no longer meet the needs of the development of the times, affecting the polyamide Fiber development. [0003] Currently, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B62/51D06P1/384D06P3/24D06P3/10D06P3/66
Inventor 尚庆梅徐飒英宋志承
Owner SHENYANG RES INST OF CHEM IND
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