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Composite dark black reactive dye

A reactive dye and dye technology, applied in the direction of organic dyes, dyeing methods, textiles and papermaking, etc., can solve the problems of large differences in hydrophilicity and lipophilicity, large differences in fiber affinity, and incompatibility of dyeing properties, and achieves the improvement of high efficiency. Dyeing rate and fixing rate, improving washing resistance, good leveling effect

Inactive Publication Date: 2013-01-30
ZHEJIANG YIDE CHEM
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In view of the fact that the current conventional dyes are not stable enough when dyeing sensitive colors such as black and gray in pad dyeing and exhaust dyeing, and the color difference between front and back is large
The dyeing properties of compound dyes are not very compatible, and the hydrophilicity and lipophilicity between them are very different, and the directness and water solubility of the fiber are quite different. It is easy to precipitate and precipitate, causing color spots, and the affinity for fibers is also quite different, which is easy to cause color flowers, resulting in a low rate of genuine products after dyeing.
To some extent, the application of reactive dyes is limited

Method used

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  • Composite dark black reactive dye
  • Composite dark black reactive dye
  • Composite dark black reactive dye

Examples

Experimental program
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Effect test

Embodiment 1

[0044] 1. Synthesis of formula (4) in reactive dye A:

[0045] 1. Diazo reaction: Add 29.5 g of p-(β-sulfate ethyl sulfone) aniline, (that is, the para-ester) into 100 ml of water and 50 g of crushed ice solution for beating for 1 hour. Then add 13.5g of hydrochloric acid (30%), stir for 1 minute, slowly add 24.3g of dissolved 30% sodium nitrite dropwise to the beaten para-ester for diazotization reaction, and control the temperature during the dropwise addition 8-15℃, pH value control 1-1.2. And make the starch potassium iodide test paper microscopically blue, and the Congo red test paper microscopically blue. After the sodium nitrite solution is added dropwise, keep the temperature at 8-15°C, control the pH value at 1-1.2, stir and react for 30 minutes, and then balance the excess sodium nitrite with sulfamic acid. The reaction formula of the diazonium reaction is shown in the following formula (26).

[0046]

[0047] 2. Coupling reaction: Add 19.5 g of 1-amino-8-napht...

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PUM

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Abstract

The invention discloses a composite dark black reactive dye. The dye is mixed by, by mass, reactive dyes of A, B and C, wherein the mass percent of the three dyes is 50-80% of A, 10-40% of B, 5-30% of C and the balance assistants, and the structural general formulas of A, B and C are presented in (1), (2) and (3). The composite dark black reactive dye is high in dye-uptake, fixation degree, alkali resistance and lifting power, low in substantivity, good in compatibility, easy to wash and wide in application; colors are guaranteed to be consistent before and after pad dyeing; and the dye is particularly suitable for dyeing of cellulosic fibers, protein fibers and polyamide fiber due to good leveling property.

Description

technical field [0001] The invention relates to a composite dark black reactive dye for cellulose fibers. Background technique [0002] As a representative of the modern dye industry, reactive dyes have developed rapidly in the past 50 years. Black dye is the most widely used and most productive color in dyes. At present, the annual output of reactive dyes for cellulose fibers in the world is about 200,000 tons, accounting for about 20% of the world's annual output of dyes. In view of the fact that the current conventional dyes are not stable enough when dyeing black, gray and other sensitive colors in pad dyeing, exhaust dyeing, etc., and the color difference between before and after is relatively large. The dyeing properties of compound dyes are not very compatible, and the hydrophilicity and lipophilicity between them are very different, and the directness and water solubility of the fiber are quite different. It is easy to precipitate and precipitate, causing color sp...

Claims

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Application Information

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IPC IPC(8): C09B67/22C09B67/24D06P1/38D06P3/66D06P3/24
Inventor 潘克存秦杰峰孟胜锋王高峰李玲
Owner ZHEJIANG YIDE CHEM
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