High light fastness azo type red reactive dye

A reactive dye and azo technology, which is applied in the direction of azo dyes, disazo dyes, organic dyes, etc., can solve the problems of low light fastness and limited applications

Active Publication Date: 2016-11-30
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the more prominent problem of this kind of dye is that the light fastness is not high, gener

Method used

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  • High light fastness azo type red reactive dye
  • High light fastness azo type red reactive dye
  • High light fastness azo type red reactive dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1.86g of cyanuric chloride and appropriate amount of crushed ice were stirred and beaten at 0°C; 2.75g of aniline-2,5-bissulfonic acid monosodium salt was dissolved in 40mL of water, and the pH was adjusted to 6.0; aniline-2,5-bissulfonic acid Add the solution into the cyanuric chloride slurry to carry out a shrinkage reaction, keep the pH at 4-5, react for 3 hours, and use Ehrlich reagent to detect the end point to obtain a shrinkage product.

[0047] 3. Dissolve 19g of H acid in 20mL of water, and adjust the pH to 4-5; drop the shrinkage product into the H acid solution, keep the water bath at 35°C for the second shrinkage reaction, keep the pH at 4-5, react for about 4 hours, and use Ehrlich reagent The end point is detected, and the dicondensed product is obtained.

[0048] Add 2.30 g of 4-acetylamino-2-aminobenzenesulfonic acid to 20 mL of water, adjust the pH to 7-8, add 0.75 g of sodium nitrite to dissolve, and obtain 4-acetylamino-2-aminobenzenesulfonic acid con...

Embodiment 2-7

[0054] The method is the same as in Example 1, but with aniline-2,4-bissulfonic acid, p-aminobenzenesulfonic acid, m-aminobenzenesulfonic acid, anthranilic acid, p-β-hydroxyethylsulfone aniline sulfate, m- β-Hydroxyethylsulfone aniline sulfate replaced aniline-2,4-disulfonic acid to synthesize the corresponding condensate, and then gradually reacted to obtain the corresponding red reactive dye. Other conditions were the same as in Example 1.

Embodiment 8

[0056] 1.86g cyanuric chloride and appropriate amount of crushed ice are stirred at 0°C for beating; 3.19g H acid is added to 20mL water to dissolve; the H acid solution is added to the cyanuric chloride slurry for a shrinkage reaction, and the pH is kept at 5-6 for about 3 hours. . Use Ehrlich to detect the end point, that is, a shrinkage product.

[0057] Add 2.30 g of 4-acetylamino-2-aminobenzenesulfonic acid to 20 mL of water, adjust the pH to 7-8, add 0.75 g of sodium nitrite to dissolve, and obtain 4-acetylamino-2-aminobenzenesulfonic acid containing sodium nitrite. In a beaker, add a small amount of ice, then add 3 mL of concentrated hydrochloric acid, and stir. Quickly pour the 4-acetylamino-2-aminobenzenesulfonic acid solution containing sodium nitrite into the concentrated hydrochloric acid solution to react in an ice bath, and use Congo red test paper and starch potassium iodide test paper to detect that they all turn blue instantly; Lisch reagent detects the end ...

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PUM

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Abstract

The invention relates to a high light fastness azo type red reactive dye. The dye adopts an azo structure as the chromophoric parent, takes chlorine or fluorotriazine, ethyl sulfone sulfate as the active group, and a pyrazolone heterocyclic structure is introduced into the azo dye with H acid as the coupling component. The dye is used for cotton fiber dyeing, and compared with the red dye using H acid as the coupling component, the sunlight fastness is increased by 1 grade to 1.5 grades, and the reactive dye has ideal light fastness.

Description

technical field [0001] The invention relates to an azo-type red reactive dye with high light fastness, in particular to an azo-type red reactive dye with high light fastness containing a pyrazolone structure. Background technique [0002] Because reactive dyes can form covalent bonds with dyed fibers, such as cotton, wool, silk, polyamide fibers, etc., they have excellent color fastness to washing and rubbing. In addition, reactive dyes also have the advantages of bright color and complete chromatogram, so they are the largest variety of cotton fiber dyes. Dyes with azo structure as the chromophoric matrix occupy the largest proportion in reactive dyes, and many commonly used reactive dyes belong to this category. Among them, the red reactive dyes with H acid as the coupling component have always been an important variety of red dyes and occupy a certain market share because of their bright color and good water solubility. However, the more prominent problem of this kind o...

Claims

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Application Information

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IPC IPC(8): C09B35/037C09B35/04
CPCC09B35/037C09B35/04
Inventor 马威曹斌张淑芬
Owner DALIAN UNIV OF TECH
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