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Dark blue dye suitable for dyeing nylon

A dye, nylon technology, applied in the field of reactive navy dye and its preparation, can solve the problems of poor fastness, unbright color, damage to human skin, etc., and achieve the effect of reducing the amount of use, bright color and eliminating pollution.

Active Publication Date: 2010-05-19
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 suitable for dyeing nylon
  • Dark blue dye suitable for dyeing nylon
  • Dark blue dye suitable for dyeing nylon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0063] Prepare the compound of following structural formula (VII)

[0064]

[0065] (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.

[0066] (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.

[0067] (c) Add bottom water to the reaction kettle, add 27.5 kg of meta-ester, stir to dissolve, adjust pH=3.5-4.0 with baking soda, m...

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PUM

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Abstract

The invention relates to a dark blue dye suitable for dyeing nylon. The dye has the following structural formula (I). A method for preparing the dye comprises the following steps: (a) obtaining diazonium liquid by adding m-(p-) nitrophenylamine to a hydrochloric acid solution and a sodium nitrite solution; (b) adding an H acid dropwise into the diazonium liquid obtained in the step (a) for reaction to produce acid coupling liquid; (c) dissolving meta-ester in water to produce a meta-ester solution; (d) adding the meta-ester solution produced in the step (c) into cyanuric chloride suspension for the reaction, and adding para-phenylene diamine after the reaction; (e) adding the hydrochloric acid solution into condensation reaction liquid produced in the step (d), and then adding sodium nitrite solution to form the diazonium liquid; (f) adding the diazonium liquid produced in the step (e) dropwise into the acid coupling liquid produced in the step (b) so as to form basic coupling liquid; and (g) converting beta-sulfate ethyl sulfone of the basic coupling liquid formed in the step (f) to vinyl sulphone radical under a basic condition so as to prepare the compound of the structural formula (I), wherein R1 represents H; R2 represents NO2 or 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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IPC IPC(8): C09B62/513D06P1/384D06P3/28D06P3/68
Inventor 张兴华李荣才
Owner TIANJIN DEK CHEM
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