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Reactive navy blue dye and preparation method thereof

A technology of reactive dyes and reactions, applied in reactive dyes, dyeing methods, azo dyes, etc., can solve problems such as poor fastness, and achieve the effects of improved fastness, extremely high reject rate, and low raw material cost

Inactive Publication Date: 2011-02-16
TIANJIN DEK CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The fastness of general cotton reactive dyes is not very good when dyeing cotton, and there are some technical problems in the dyeing of cellulose fiber and cellulose fiber and protein fiber blended fabrics.

Method used

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  • Reactive navy blue dye and preparation method thereof
  • Reactive navy blue dye and preparation method thereof
  • Reactive navy blue dye and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] a. meta-ester diazotization reaction

[0043] Add bottom water to the reaction kettle, add 15 parts of meta-ester, stir to dissolve, add quantitative 30% hydrochloric acid solution, add crushed ice to make the solution C=10-15%, then add 30% nitrous acid sodium solution. Make the pH in the reaction solution > 2.0, and the starch potassium iodide test paper will be slightly blue after dipping. T=0-5°C, react for 2 hours. Use sulfamic acid to eliminate excess nitrous acid, and wait for acidic coupling.

[0044] b. Acid coupling reaction

[0045] Take 33.5 parts of H acid, neutralize pH=6.0-7.0 with 20%-40% sodium hydroxide solution, dissolve it completely, add it to the meta-ester diazonium salt, control T=0-5°C, and react 6 -10 hours, after passing the TCL chromatographic analysis, wait for alkaline coupling.

[0046] c. Preparation of Condensate

[0047] Add a small amount of bottom water into the reaction kettle, add crushed ice cubes, then add 35 parts of sodium...

Embodiment 2

[0058] a. The diazotization reaction of sodium p-aminobenzenesulfonate

[0059] Add bottom water to the reaction kettle, add 13.8 parts of sodium p-aminobenzenesulfonate, stir to dissolve, add quantitative 30% hydrochloric acid solution, add crushed ice cubes, make C=5-10% in the solution, and then add 30% of sodium nitrite solution. The pH in the reaction solution is greater than 2.0, and the starch potassium iodide test paper is slightly blue after soaking. T=0-5°C, react for 1-3 hours. Use sulfamic acid to eliminate excess nitrous acid, and wait for acidic coupling.

[0060] b. Acid coupling reaction

[0061] Add 32.7 parts of H acid to p-nitroaniline diazonium salt, control T=10-20°C, react for 6-10 hours, and wait for alkaline coupling after passing the TCL chromatography analysis.

[0062] c. Para-ester diazotization reaction

[0063] Add bottom water to the reaction kettle, add 27.5 parts of para-ester, stir to dissolve, add quantitative 30% hydrochloric acid solut...

Embodiment 3

[0074] a Add a small amount of bottom water to the reaction kettle, add crushed ice cubes, then add 35 parts of sodium 2,4-diaminobenzenesulfonate, add 24 parts of cyanuric chloride dropwise while stirring, T=0-5°C, use 10%-20% sodium carbonate solution is used to control the pH=6.0-7.5. After reacting for 4-6 hours, after the TLC plate confirms that it is qualified, the condensate is diazotized. .

[0075] b. Adjust the temperature of the condensate solution T=5-12, add quantitative 30% hydrochloric acid solution, and then add 30% sodium nitrite solution. Make the pH in the reaction solution > 2.0, and the starch potassium iodide test paper will be slightly blue after dipping. T=15-20°C, react for 1-3 hours. Use sulfamic acid to eliminate excess nitrous acid, and wait for acidic coupling.

[0076] b. Acid coupling reaction

[0077] Take 33.5 parts of H acid, use 20%-40% sodium hydroxide solution to neutralize pH=6.0-7.0, and make it completely dissolved. Add it dropwise t...

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Abstract

The invention discloses a reactive dye, which is applicable to cotton and wool blending, and has the following general structural expression: Y = SO2R1OSO3M, SO2R1 or M = Na, n = 0 or 1, R = R1OSO3M or OM, wherein R1 refers to the alkyls or alkenyls of 1 to 3 carbon atoms, and X refers to chlorine. In addition, the invention also provides a method for preparing the reactive dye.

Description

technical field [0001] The invention relates to a reactive dye suitable for dyeing pure cotton and blended cotton and wool and a preparation method thereof. Background technique [0002] The printing and dyeing industry is a highly polluting industry, and a large amount of wastewater is discharged every year, causing serious environmental pollution. Choosing environmentally friendly dyes is the best way to solve the problem of environmental pollution in the printing and dyeing industry. It is imperative for dye workers to develop environmentally friendly dyes. High fixation rate and high promotion rate are the inevitable trend of dye development. [0003] The fastness of general cotton reactive dyes is not very good when dyeing cotton, and there are some technical problems in the dyeing of cellulose fiber and cellulose fiber and protein fiber blended fabrics. [0004] Digital printing technology is a newly developed new technology. The latest high-tech printing technology i...

Claims

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Application Information

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IPC IPC(8): C09B62/67C09B62/513D06P3/66D06P1/384D06P3/85
Inventor 张兴华邢广文李荣才
Owner TIANJIN DEK CHEM
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