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Dark blue dye for dyeing nylon and preparation method thereof

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

Active Publication Date: 2010-05-12
TIANJIN DEK CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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  • Dark blue dye for dyeing nylon and preparation method thereof
  • Dark blue dye for dyeing nylon and preparation method thereof
  • Dark blue dye for dyeing nylon and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0065] Prepare the compound of following structural formula (VII)

[0066]

[0067] (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.

[0068] (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.

[0069](c) Add bottom water in the reaction kettle, add 30.5 kg of o-methoxyaniline meta-position ester, stir and dissolve, adjust pH=3...

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PUM

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Abstract

The invention relates a dark blue dye for dyeing nylon and a preparation method thereof. The dye has a structural formula (I). The method for preparing the dye comprises the following steps: (a) adding solution of hydrochloric acid solution and solution of sodium nitrite into meta(para)-nitroaniline to obtain diazonium liquor; (b) dripping an H acid into the diazonium liquor obtained by the step (a) to perform reaction to obtain acid coupling liquor; (c) dissolving o-methoxyaniline meta-ester in water to obtain solution of o-methoxyaniline meta-ester; (d) adding the solution of o-methoxyaniline meta-ester obtained by the step (c) into cyanuric chloride suspension perform reaction, and adding 2,4-diaminobenzene sulfonic acid when the reaction is finished; (e) adding the solution of hydrochloric acid and the solution of the sodium nitrite into condensation reaction liquor obtained by the step (d) to obtain the diazonium liquor; (f) dripping the diazonium liquor obtained by the step (e) into the acid coupling liquor obtained by the step (b) to obtain alkaline coupling liquor; and (g) converting beta-sulfate ethyl sulfone of the coupling liquor obtained by the step (f) into vinylsulfonyl under an alkaline condition so as to obtain compounds of the structural formula (I), wherein R1 represents H and R2 represents NO2; or R2 represents H, and R1 represents NO2.

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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Patent Type & Authority Applications(China)
IPC IPC(8): C09B62/513C07D251/50D06P3/28
Inventor 张兴华李荣才
Owner TIANJIN DEK CHEM
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