Reactive brown dye and preparation method thereof

A reactive brown and dye technology, applied in the direction of reactive dyes, azo dyes, organic dyes, etc., can solve the problems of large color difference, poor stability, color flower, etc., to prevent large head and tail color difference, good comprehensive performance, good light fastness Effect

Inactive Publication Date: 2007-12-05
褚平忠
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Recently, reactive dyes are used to dye brown and dark brown with two or three color combinations. However, due to the different solubility of various monomer dyes in the combination of compound dyes, the stability of dyeing is poor, and the color difference between the head and the tail of the dyed fabric is large. , the color difference between cylinders is large, so the reproducibility is extremely poor, and it is easy to cause color flowers and affect the quality of dyed fabrics

Method used

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  • Reactive brown dye and preparation method thereof
  • Reactive brown dye and preparation method thereof
  • Reactive brown dye and preparation method thereof

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Embodiment Construction

[0020] Diazotization: fully stir 100% 28.1 parts of p-ester in 150 parts of ice water, add 13ml of concentrated hydrochloric acid, cool the obtained suspension to 5-10°C, slowly add 100% 6.9 parts of sodium nitrite solution dropwise, Until the potassium iodide starch test paper turns blue, stir at 5-10°C for 1 hour, and remove nitrous acid with sulfamic acid.

[0021] Coupling: 31.6 parts of 100% phenyl gamma acid, add 250 ml of water and stir, add industrial NaOH to adjust pH=6.5 to make it completely dissolved. Then add the p-ester diazonium salt into the phenyl gamma acid solution in a thin stream, and adjust the pH to 6.3-6.5 with soda ash, and control the temperature at 5-10°C. After adding the diazonium salt, stir at 5-10°C for 4 hours Until the diazonium salt disappears, desalination and spray drying give the brown dye of the following formula:

[0022]

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Abstract

The present invention discloses one kind of active brown dye in the structure as shown and its preparation process. The active brown dye has high light fastness, high perspiration fastness and high soaping fastness, and is suitable for dyeing and printing various kinds of fabric of cotton, viscose, hemp, etc.

Description

technical field [0001] The invention relates to a reactive brown dye and a preparation method thereof. Background technique [0002] The practice of dyeing with reactive dyes shows that higher requirements are placed on the quality of dyeing, so there is still a need for new reactive dyes with improved properties. Recently, reactive dyes are used to dye brown and dark brown with two or three color combinations. However, due to the different solubility of various monomer dyes in the combination of compound dyes, the dyeing stability is poor, and the color difference between the head and the tail of the dyed fabric is large. , The color difference between cylinders is large, so the reproducibility is extremely poor, and it is easy to cause color flowers and affect the quality of dyed fabrics. Contents of the invention [0003] In order to solve the above problems: the invention provides a kind of reactive brown dye and preparation method thereof. [0004] Development of a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B62/008
Inventor 褚平忠
Owner 褚平忠
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