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Nylon reactive red dye

A reactive dye, nylon technology, applied in reactive dyes, azo dyes, organic dyes, etc., can solve the problem of unable to meet the needs of nylon dyeing, and achieve the effect of bright color, reducing pollution and reducing environmental pollution

Active Publication Date: 2013-04-10
TIANJIN DEK CHEM
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acid dyes, weak acid dyes and metal complexes can no longer meet the needs of nylon dyeing

Method used

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  • Nylon reactive red dye
  • Nylon reactive red dye
  • Nylon reactive red dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0068] The preparation of the nylon active red dye compound of embodiment structural formula (II)

[0069]

[0070] a, the preparation of condensate:

[0071] In the dissolution tank, add a small amount of bottom water and 30Kg of para-fat, and use NaHCO 3 Neutralize pH=4-5 to obtain para-ester solution; add a small amount of water and a small amount of crushed ice to the reaction kettle, then add 19Kg of cyanuric chloride, add para-ester dropwise while stirring, T=10-15°C , pH=2-3.5, the dropwise addition is completed, and react for 5 hours to obtain a condensation solution; add 26.5Kg of J acid to the condensation solution, adjust T=35-40°C, pH=5-6, and react for 3 hours to obtain Secondary condensate.

[0072] b, 4-aminodiphenylamine-2-sulfonic acid diazotization:

[0073] Add bottom water and 23.2Kg of 4-aminodiphenylamine-2-sulfonic acid to the reaction kettle, stir evenly, add crushed ice, 30% hydrochloric acid solution and sodium nitrite solution. At 15-20°C, PH<...

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Abstract

The invention relates to a nylon reactive red dye. The dye is a compound having a structure represented by formula (I). The preparation method of the dye comprises the following steps: 1, adding a para-ester solution to a cyanuric chloride solution for reacting to obtain a first condensation solution, and adding a J acid to the first condensation solution to obtain a second condensation solution; 2, adding a hydrochloric acid solution and a sodium nitrite solution to 4-aminodiphenylamine-2-sulfonic acid, reacting under a condition that the PH value is less than 2, and eliminating excess nitrous acid by sulfamic acid to obtain a diazo solution; 3, adding the diazo solution obtained in step 2 to the second condensation solution obtained in step 1 in a dropwise manner to obtain a coupling reaction solution; 4, heating the coupling reaction solution obtained in step 3, maintaining the pH value in a range of 8-11, and hydrolyzing; 5, filtering the hydrolysis reaction solution obtained in step 4 to remove waste residues, and collecting the obtained filtrate; 6, carrying out colored light and intensity adjustment of the filtrate obtained in step 5; and 7, carrying out spray drying of the color solution obtained in step 6 to obtain the dye of the formula (I).

Description

technical field [0001] The invention relates to a nylon reactive dye and a preparation method thereof. Especially nylon red reactive dye and its preparation method. Background technique [0002] Now the dyes used in general nylon dyeing are acid dyes, weak acid dyes and metal complex dyes. Because the wet fastness of nylon dyed by these dyes is not good, the shade is not very bright, but the absorption rate is low, and the concentration of dyeing waste liquid is high, especially heavy metals, which cause serious pollution to the environment. In the 21st century, due to environmental and ecological constraints, the requirements for color uptake rate, color fixation rate and dyeing waste liquid are getting higher and higher. Acid dyes, weak acid dyes and metal complexes can no longer meet the needs of nylon dyeing. [0003] At present, there is an urgent need to reduce environmental pollution and have low raw material cost, bright color, and excellent wet fastness performan...

Claims

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Application Information

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IPC IPC(8): C09B62/51C09B67/24D06P3/24D06P1/384D06P1/382
Inventor 张兴华邢广文
Owner TIANJIN DEK CHEM
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