Dye suitable for nylon dyeing

A nylon and dye technology, used in azo dyes, organic dyes, reactive dyes, etc., can solve the problem of not meeting the needs of nylon dyeing, and achieve the effects of bright color, convenient use and pollution reduction.

Active Publication Date: 2011-05-04
TIANJIN DEK CHEM
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  • Claims
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Problems solved by technology

Acid dyes, weak acid dyes and metal comple...

Method used

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  • Dye suitable for nylon dyeing
  • Dye suitable for nylon dyeing
  • Dye suitable for nylon dyeing

Examples

Experimental program
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Embodiment 1

[0062] The preparation of the nylon reactive red dye compound of embodiment 1 structural formula (II)

[0063]

[0064] a, the preparation of condensate:

[0065] In the dissolution tank, add a small amount of bottom water and 30Kg of p-β-hydroxyethyl sulfone aniline, and use NaHCO 3 Neutralize pH=4-5 to obtain p-β-hydroxyethyl sulfone aniline solution; add a small amount of water and a small amount of crushed ice to the reaction kettle, then add 19Kg of cyanuric chloride, and add p-β dropwise while stirring -Hydroxyethyl sulfone aniline, T=10-15°C, pH=2-3.5, after the dropwise addition, react for 5 hours to obtain a primary condensation liquid; add 26.5Kg of J acid to the primary condensation liquid to adjust T=35- 40°C, pH=5-6, react for 3 hours to obtain secondary condensation liquid.

[0066] b, 4-aminodiphenylamine-2-sulfonic acid diazotization:

[0067] Add bottom water and 20Kg of 4-aminodiphenylamine-2-sulfonic acid to the reaction kettle, stir evenly, add crushe...

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Abstract

The invention relates to a dye suitable for nylon dyeing, which is a compound shown by the following formula (I). The preparation method comprises the following steps: a. adding a para-beta-hydroxyethyl sulfonyl aniline solution into a cyanuric chloride solution to react to obtain a primary condensation solution, and adding J acid into the primary condensation solution to obtain a secondary condensation solution; b. adding a hydrochloric acid solution and a sodium nitrite solution into 4-aminodiphenylamine-2-sulfoacid to react under the condition that the PH is less than 2, and eliminating excessive nitrous acid by utilizing sulfamic acid to obtain a heavy nitrogen solution; c. dropwisely adding the heavy nitrogen solution obtained in step b into the secondary condensation solution obtained in step a to obtain a coupling reaction solution; d. heating the coupling reaction solution obtained in step c, and hydrolyzing under the condition that the pH is equal to 8-11; e. filtering the hydrolyzed reaction solution obtained in step d to remove waste residue, and collecting the filter liquor; f. regulating the colored light and intensity of the filter liquor in step e; and g. carrying out spray drying on the color solution in step f to obtain the final product in the formula (I).

Description

technical field [0001] The invention relates to a preparation method of nylon reactive dye. 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 performance. Nylon r...

Claims

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Application Information

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IPC IPC(8): C09B62/085C09B67/24
Inventor 张兴华邢广文
Owner TIANJIN DEK CHEM
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