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Active navy blue dye

A technology of reactive navy and dye, applied in the field of reactive navy dye and its preparation, can solve the problems of not bright color, poor fastness, damage to human skin, etc., and achieve the effect of bright color, reducing usage and eliminating pollution.

Active Publication Date: 2010-06-30
TIANJIN DEK CHEM
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AI Technical Summary

Problems solved by technology

Because the fabrics dyed by weak acid dyes have poor fastness and not bright shade, especially the pollution of heavy metals in the manufacturing process of metal complex dyes and the pollution during dyeing, and the damage of dyed nylon fabrics to human skin

Method used

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  • Active navy blue dye
  • Active navy blue dye
  • Active navy blue dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0064] Prepare the compound of following structural formula (VII)

[0065]

[0066] (a) Add bottom water in the reaction kettle, add 13.8 kilograms of p-nitroaniline, stir and dissolve, add quantitative 30% hydrochloric acid solution, add crushed ice cubes, make the solution mass / volume (g / ml) concentration be 10 %, then add 30% sodium nitrite solution, keep the pH of the solution < 2 during the reaction, the starch potassium iodide test paper is slightly blue after soaking, keep the temperature at 15°C, react for 2 hours, and use sulfamic acid to eliminate excess nitrite nitric acid, diazo solution.

[0067] (b) Prepare 32.7 kg of H acid into an aqueous solution, adjust the pH value to 6.8-7.2, add it dropwise to the diazonium solution in step (a), keep the temperature at 10°C, and react for 6 hours to obtain an acidic coupling solution.

[0068] (c) Add bottom water to the reaction kettle, add 27.5 kg of para-ester, stir to dissolve, adjust pH=3.5-4.0 with baking soda, m...

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Abstract

The invention relates to active navy blue dye, which has the following structural formula (I). A preparation method of the active navy blue dye comprises the following steps: (a) adding hydrochloric acid solution and sodium nitrite solution into meta (para) nitro aniline; (b) dripping H acid into the solution of the (a) step for reaction; (c) dissolving contraposition ester into water; (d) addingthe solution obtained in the (c) step into cyanuric chloride suspension for reaction, and adding 2, 5-diamino benzene sulfonic acid after the reaction completion; (e) adding the hydrochloric acid solution into reaction liquid of the (d) step, and then adding the sodium nitrite solution; (f) dripping the solution of the (e) step into the solution of the (b) step; and (g) preparing and obtaining the compound with the structural formula (I) through placing the coupling solution of the (f) step under the alkaline condition.

Description

technical field [0001] The invention relates to a dye and a preparation method thereof, in particular to a reactive navy blue dye and a preparation method thereof. Background technique [0002] The dyes generally used in the dyeing of nylon fabrics are weak acid dyes and metal complex dyes. The fabrics dyed by weak acid dyes have poor fastness and not bright shade, especially the pollution of heavy metals in the manufacturing process of metal complex dyes and the pollution during dyeing, as well as the damage of dyed nylon fabrics to human skin. Due to environmental and ecological constraints, the requirements for dyeing rate, color fixing rate and dyeing wastewater are getting higher and higher. The development of navy blue reactive nylon dyes has always been a hot spot in the dye industry, because navy blue is the most used in all shades and is the main component of black spelling. The invention provides a reactive navy blue dye suitable for nylon dyeing, which solves th...

Claims

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Application Information

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IPC IPC(8): C09B62/09C09B67/24
Inventor 张兴华李荣才
Owner TIANJIN DEK CHEM
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