Reactive navy blue dye suitable for dyeing nylon and preparation method thereof

A technology of reactive navy blue and dyes, applied in the field of reactive navy blue dyes and its preparation, can solve problems such as poor fastness, dull shade, damage to human skin, etc.

Active Publication Date: 2010-06-16
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 t

Method used

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  • Reactive navy blue dye suitable for dyeing nylon and preparation method thereof
  • Reactive navy blue dye suitable for dyeing nylon and preparation method thereof
  • Reactive navy blue dye suitable for dyeing nylon and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Compounds of the following structural formula (VI) are prepared:

[0094]

[0095] (a) Diazotization reaction of m-nitroaniline

[0096] Add bottom water in the reaction kettle, add 13.8 kilograms of m-nitroaniline, stir and dissolve, add quantitative 30% hydrochloric acid solution, add crushed ice cubes, make the solution mass / volume (g / ml) concentration 10%, and then Add 30% sodium nitrite solution, keep the pH<2 in the reaction solution, the starch potassium iodide test paper will turn slightly blue after dipping, keep the temperature at 15°C, react for 2 hours, use sulfamic acid to eliminate excess nitrous acid, and obtain weight Nitrogen solution.

[0097] (b) acidic coupling reaction

[0098] Dissolve 32.7 kg of H acid completely in water, adjust the pH to 6.8-7.2 with baking soda, add 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.

[0099] (c) meta-ester dissolution ...

Embodiment 2

[0114] Prepare the compound of following structural formula (VII)

[0115]

[0116] (a) diazotization reaction of p-nitroaniline

[0117] 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%, and then Add 30% sodium nitrite solution, keep the pH of the reaction solution < 2, the starch potassium iodide test paper will turn slightly blue after dipping, keep the temperature at 15°C, react for 2 hours, use sulfamic acid to eliminate excess nitrous acid, and obtain diazonium liquid.

[0118] (b) acidic coupling reaction

[0119] Dissolve 32.7 kg of H acid completely in water, adjust the pH to 6.8-7.2 with baking soda, add dropwise to the p-nitroaniline diazonium solution obtained in step (a), keep the temperature at 10°C, and react for 6 hours to obtain acidic coupling liquid.

[0120] (c) para-ester d...

Embodiment 3

[0136] Preparation of compounds of structural formula (VIII):

[0137]

[0138] (a) diazotization reaction of p-nitroaniline

[0139] Add bottom water in the reaction kettle, add 13.8 kilograms of p-nitroaniline, stir and dissolve, add 30% hydrochloric acid solution, add crushed ice cubes, make the solution mass / volume (g / ml) concentration be 10%, then add 30% of sodium nitrite solution. Keep the pH of the reaction solution < 2, the starch potassium iodide test paper will turn slightly blue after dipping, keep the temperature at 15°C, react for 2 hours, use sulfamic acid to eliminate excess nitrous acid, and obtain diazonium solution.

[0140] (b) acidic coupling reaction

[0141] Dissolve 32.7 kg of H acid completely in water, adjust the pH to 6.8-7.2 with baking soda, add it dropwise to p-nitroaniline diazonium salt, keep the temperature at 10°C, and react for 6 hours to obtain an acidic coupling solution.

[0142] (c) Dissolution of Clixidin para-ester

[0143] Add b...

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PUM

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Abstract

The invention relates to a reactive navy blue dye suitable for dyeing nylon and a preparation method thereof. The dye has the following structural formula (I), wherein R1 is H, alkyl group, alkoxy group or SO3M; R2 is H, alkyl group, alkoxy group or SO3M; and Z is SO2CHCH2; M is H or alkali metal; and n is 0 or 1.

Description

technical field [0001] The invention relates to a dye and a preparation method thereof, in particular to a reactive navy blue dye suitable for nylon dyeing 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 nyl...

Claims

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Application Information

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IPC IPC(8): C09B62/513D06P1/384D06P3/24D06P3/66
Inventor 张兴华李荣才
Owner TIANJIN DEK CHEM
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