Bi-azo active dye, its production and composition

A technology of reactive dyes and disazo, applied in azo dyes, reactive dyes, dyeing methods, etc., can solve problems affecting economy and environmental protection, unusable hydrolyzed dyes, poor compatibility, etc., and achieve bright color and light , Excellent application effect, high blackness effect

Inactive Publication Date: 2007-09-05
ZHEJIANG LONGSHENG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Reactive dyes have become the fastest-growing class of dyes because of their bright color, complete chromatogram, easy application, and excellent fastness. However, traditional reactive dyes have obvious shortcomings in the dyeing process. Therefore, how to improve the structure of reactive dyes and obtain high color fixation and low-salt reactive dyes has always been a research hotspot.
[0003] In

Method used

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  • Bi-azo active dye, its production and composition
  • Bi-azo active dye, its production and composition
  • Bi-azo active dye, its production and composition

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0051] Example 1

[0052] 24.3 parts of substituted aniline of formula (VI-a), add 100 parts of water and stir evenly, cool to 0-5°C, add 18 parts of concentrated hydrochloric acid, and add 6.9 parts of sodium nitrite with a content of 30% dropwise at 0-5°C Add the aqueous solution within 10 minutes, continue to stir for 20 minutes, add sulfamic acid to eliminate excess nitrous acid, and obtain diazonium salt.

[0053] Add 18.8 parts of m-phenylenediamine o-sulfonic acid into 100ml of water and stir, adjust the pH to 7, after dissolving, add dropwise to the diazonium salt of formula (VI-a), the coupling temperature is 10°C, and adjust the pH of the solution to 2.5- 3. The dropwise addition is completed within 30 minutes. After the dropwise addition, adjust the pH of the solution to 2.5-3 with 10% sodium carbonate solution and react for 3 hours to obtain the monoazo dye of formula (VII-a).

[0054] Add 38.3 parts of the sulfonated para-ester of formula (VIII-a) to 100ml of wat...

Example

[0057] Embodiment 2-8

[0058] According to the preparation method of Example 1, the difference is that the compounds listed in Table 1 are used to replace formula (VI-a) and formula (VIII-a) in Example 1 respectively, and a series of orange dyes as shown in the following table can be obtained.

[0059] Table 1

[0060]

[0061]

[0062]

Example Embodiment

[0063] Example 9

[0064] 24.3 parts of substituted aniline of formula (VI-a), add 100 parts of water and stir evenly, cool to 0-5°C, add 18 parts of concentrated hydrochloric acid, add 6.9 parts of 30% aqueous solution of sodium nitrite dropwise at 0-5°C, The addition was completed within 10 minutes, and after continuing to stir for 20 minutes, sulfamic acid was added to eliminate excess nitrous acid to obtain diazonium salt.

[0065] Add 21.58 parts of 2-amino-5-naphthol-7-sulfonic acid into 100ml of water and stir, adjust the pH to 7 and dissolve, then add dropwise to the diazonium salt solution of formula (VI-a) obtained above, the coupling temperature At 10°C, adjust the pH of the solution to 2-2.5 at the same time, and complete the dropwise addition within 30 minutes. After the dropwise addition, adjust the pH of the solution at 2-2.5 with 10% sodium carbonate solution and react for 3 hours to obtain the monoazo dye of formula (VII-b) .

[0066] Add 38.3 parts of the s...

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Abstract

A dual-azo active dye, its production and composition are disclosed. It has bright color, excellent firmness, water-proof and anti-friction performances. It can be used to print cellulose base fiber and dye composition.

Description

(1) Technical field [0001] The invention relates to a disazo reactive dye and a preparation method thereof, and also relates to a composition of the disazo reactive dye. (2) Background technology [0002] Reactive dyes have become the fastest-growing class of dyes because of their bright color, complete chromatogram, easy application, and excellent fastness. However, traditional reactive dyes have obvious shortcomings in the dyeing process. Therefore, how to improve the structure of reactive dyes and obtain high fixation rate and low-salt reactive dyes has always been a research hotspot. [0003] In the dyeing of reactive dyes, black is a species with a large amount of consumption. At present, the most commonly used is the mixture of C.I. reactive black 5 and orange and red components. However, this dye also has disadvantages in dyeing: dye uptake Not high, generally only 70-80%, the amount of electrolyte is large, and the compatibility is not very good, resulting in insuff...

Claims

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Application Information

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IPC IPC(8): C09B62/513D06P1/38D06P1/48
Inventor 阮伟祥宫国梁欧其
Owner ZHEJIANG LONGSHENG GROUP
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