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A kind of reactive dye and preparation method thereof

A reactive dye and blue technology, applied in the field of dyes, can solve the problems of environmental hazards, poor shade, and large environmental pollution, and achieve the effects of less environmental pollution, bright shade, and wide applicability

Active Publication Date: 2015-10-21
TIANJIN DEK CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The main dyes currently on the market are acid dyes, disperse dyes, mordant dyes and metal complex dyes. The dyed materials of the above types of dyes have poor fastness, not bright shade, low dyeing absorption rate and color fixation rate. Low, great environmental pollution, especially the free heavy metals that may appear in metal complex dyes are harmful to the human body and the environment

Method used

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  • A kind of reactive dye and preparation method thereof
  • A kind of reactive dye and preparation method thereof
  • A kind of reactive dye and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A kind of azo type blue reactive dye, has the structural formula of formula (Ⅲ),

[0055]

[0056] The preparation method of this blue active dye, comprises the steps:

[0057] a), para-ester diazotization:

[0058] 200ml of water was added to a 1000ml beaker, and then 28.1g of 100% para-ester was added and stirred for 15 minutes. Another 24.3 g of 30% hydrochloric acid solution was added. Directly use ice to adjust the temperature of the solution to be less than 0° C., and add 23.5 g of 30% sodium nitrite solution quickly under the condition that the pH value of the reaction solution is less than 2. Maintain the temperature at 0-5°C and react for 2 hours. During the reaction, keep the Congo red test paper infiltrated and blue, and the starch KI test paper infiltrated and blue. After the reaction is completed, the remaining nitrous acid is removed with sulfamic acid to obtain a diazotization solution for later use.

[0059] b), H acid dissolution:

[0060] Add w...

Embodiment 2

[0089] The para-position ester in the a) step of the preparation method of Example 1 is replaced by the meta-position ester, and the blue reactive dye with the following formula (IV) structure will be obtained

[0090]

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Abstract

The invention relates to a reactive dye and a preparation method thereof. The structural general formula of the reactive dye is shown in the specification. M is -H or alkali metal, preferably, -Na. The reactive dye has good water solubility, high affinity under the dyeing condition, wide printing and dying technological applicability, low environmental pollution, gorgeous color light, excellent operational performances and no free heavy metal.

Description

technical field [0001] The invention relates to a dye, especially a reactive dye and a preparation method thereof. Background technique [0002] The main dyes currently on the market are acid dyes, disperse dyes, mordant dyes and metal complex dyes. The dyed materials of the above types of dyes have poor fastness, not bright shade, low dyeing absorption rate and color fixation rate. Low, great environmental pollution, especially the free heavy metals that may appear in metal complex dyes are harmful to the human body and the environment. With the progress of society, people's awareness of environmental protection is getting stronger and stronger, and environmentally friendly dyes have become the current development trend. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a product with good water solubility, high affinity under dyeing conditions, wide applicability of printing and dyeing pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B62/83C09B67/24C09B67/36D06P1/38D06P3/66D06P3/24
Inventor 张兴华李荣才邢广文
Owner TIANJIN DEK CHEM
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