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Reactive blue dye and preparation method thereof

A reactive dye and blue technology, applied in the direction of reactive dyes, azo dyes, organic dyes, etc., can solve the problems of color fixation rate, alkali resistance and low light fastness, meet the requirements of strong alkali, improve Color fixation rate, effect of improving solubility

Active Publication Date: 2015-03-04
TIANJIN DEK CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Reactive dyes have bright color and good wet fastness. They have their performance advantages, but they also have disadvantages. The color fixation rate, alkali resistance and light fastness are generally low, especially for the blue series of reactive dyes. This deficiency is more obvious.

Method used

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  • Reactive blue dye and preparation method thereof
  • Reactive blue dye and preparation method thereof
  • Reactive blue dye and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of blue reactive dye, the structural formula of this blue reactive dye is as shown in formula (II):

[0039]

[0040] The preparation method of above-mentioned formula (II) blue reactive dye, comprises the steps:

[0041] Add 500ml bottom water to 1000ml beaker, 60g Raise the temperature to 60°C, gradually add 29.4 g of chloranil, and use NaHCO 3 Adjust the pH to 6-8, generally control the addition time within 1 hour, and control the temperature at 55-65°C. After the reaction, cool down to below 30°C, filter, wash the filter cake with water twice, and dry at 60-80°C to obtain condensation Dried goods;

[0042] In a 500ml four-neck bottle, add 290g of 20% concentration of fuming sulfuric acid, slowly add 67.5g of the dry product of the above-mentioned condensate, cool down with cooling water, and the feeding temperature is ≤30°C. After adding, keep it for 2 hours, then slowly add 54gK 2 S 2 o 8 The temperature is controlled at 30-60°C, the feeding time i...

Embodiment 2

[0050] Will in embodiment 1 Replace with:

[0051] Other steps are with embodiment 1, and the structural formula of the blue reactive dye that makes is as follows:

[0052]

[0053] The performance of the dyestuff of embodiment 2 is as follows:

[0054]

Embodiment 3

[0056] Will in embodiment 1 Replace with:

[0057] Other steps are with embodiment 1, and the structural formula of the blue reactive dye that makes is as follows:

[0058]

[0059] The performance of the dyestuff of embodiment 3 is as follows:

[0060]

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Abstract

The invention relates to a reactive blue dye and a preparation method thereof. The prepared blue reactive dye is improved in color fixing rate, alkali resistance and solarization fastness and also improved in solubility, and has the obvious advantage that the alkali resistance of the blue reactive dye is capable of satisfying the strong-basicity requirement of cold pad batch. The blue reactive dye is applicable to dyeing of cotton, flax and wool fiber.

Description

technical field [0001] The invention belongs to the technical field of dye chemical industry, and relates to the chemical structure of dye and its preparation method, in particular to the structure of brilliant blue reactive dye and its preparation method. Background technique [0002] Reactive dyes have bright color and good wet fastness. They have their performance advantages, but they also have shortcomings. The color fixation rate, alkali resistance and light fastness are generally low, especially for the blue series of reactive dyes. This deficiency is more obvious. Therefore, foreign countries have successively developed blue reactive dyes containing heterocyclic chromophores for properties such as color fixation rate, alkali resistance and light fastness, but the alkali resistance still cannot meet the requirements of cold pad batch, and the solubility is affected. The blue reactive dye prepared by the invention not only improves the color fixation rate, alkali resist...

Claims

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Application Information

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IPC IPC(8): C09B62/503C09B67/24
Inventor 张兴华张玉卿彭真张幼衡
Owner TIANJIN DEK CHEM