Wool bright yellow active dye and preparation method thereof

A reactive dye and bright yellow technology, applied in reactive dyes, dyeing methods, organic dyes, etc., can solve the problems of cumbersome steps, difficult to obtain small dyes, environmental pollution, etc., achieve high color fixation rate, broad commercialization prospects, high quality The effect of dyeing rate and color fixing rate

Active Publication Date: 2013-10-23
中国中化股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this process to prepare Lanasol Yellow 4G, small dyes are not easy to obtain, the steps are cumbersome, and a large amount of waste water is generated during the preparation process, causing great pollution to the environment

Method used

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  • Wool bright yellow active dye and preparation method thereof
  • Wool bright yellow active dye and preparation method thereof
  • Wool bright yellow active dye and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The preparation of embodiment 1 dyestuff (1)

[0046]

[0047] Dissolve 2.1 parts of 2,4-diaminobenzenesulfonic acid in 30 parts of water, cool in an ice-water bath, control the solution temperature between 0-5°C, add 2.5 parts of 2,3-dibromopropionyl chloride, and The pH of the reaction solution was adjusted by sodium to be between 6-7, and the reaction was continued for 1 hour. The end point of the reaction was detected by HPLC.

[0048] Add 2 parts of 30% hydrochloric acid to the above solution, control the temperature of the reaction solution at 5-10° C., and add 0.67 parts of sodium nitrite. Keep the temperature between 10-15°C and react for 2 hours.

[0049] After the diazotization reaction, use sulfamic acid to eliminate excess nitrous acid, and then add it to the completely dissolved 1-(4-sulfonic acid phenyl)-3-carboxy-5-pyrazolone solution [Disperse 2.7 parts of 1-(4-sulfophenyl)-3-carboxy-5-pyrazolone in 30 parts of water, adjust the pH of the solution ...

Embodiment 2

[0054] The preparation of embodiment 2 dyes (2)

[0055]

[0056] The coupling component is selected as 1-(3-aminophenyl)-3-carboxy-5-pyrazolone to replace 1-(4-sulfonic acid phenyl)-3-carboxy-5-pyridine in Example 1 The preparation method of oxazolinone is the same as in Example 1 to obtain yellow dye (2).

Embodiment 3

[0057] The preparation of embodiment 3 dyes (3)

[0058]

[0059] The coupling component is selected as 1-(3-amino-2-methyl-5-sulfonic acid phenyl)-3-methyl-5-pyrazolone to replace 1-(4-sulfonic acid in Example 1 phenyl)-3-carboxy-5-pyrazolone, the preparation method is the same as in Example 1 to obtain a yellow dye (3).

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Abstract

The invention discloses a wool bright yellow active dye with a novel structure. A structural general formula of the wool bright yellow active dye is as follows: the definition of each group in the formula is shown in a description. The wool bright yellow active dye is mainly used for dying and printing wool, silks, polyamide and blended fabric thereof or can be used for dying and printing loose wool, wool top, yarn, carpet and a textile subjected to shrink proofing and woven fabric. After being dyed, the textile has bright colors, favorable level dyeing effect and tone reproducibility, high absorbability and color fixation rate, and excellent light fastness and wet treatment fastness, and can meet the requirements of the market on the environmental and ecological protection of the dye.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a bright yellow reactive dye for wool and a preparation method thereof. Background technique [0002] In 1966, Ciba Company launched Lanasol series of reactive dyes for wool. Among the Lanasol series of reactive dyes, the yellow variety is Lanasol Yellow 4G, which has the following structural formula: [0003] [0004] The preparation of Lanasol Yellow 4G is only introduced in the patent GB885815, but the preparation process introduced in this patent is based on the following small dye as the starting material, and 2,3-dibromopropionyl chloride dissolved in acetone at 0-5 °C Reaction, salting out and drying after half an hour to obtain Lanasol Yellow 4G before debromination. Using this process to prepare Lanasol Yellow 4G, small dyes are not easy to obtain, the steps are cumbersome, and a large amount of waste water is generated during the preparation process, causi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B62/473D06P1/384D06P3/10
Inventor 徐飒英肖洋王勇李付刚杨桂芳
Owner 中国中化股份有限公司
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