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Blue active dye of formazan, and preparation method

A reactive dye and blue technology, applied in reactive dyes, cationic nail dyes, dyeing methods, etc., to achieve the effects of easy industrial production, good light fastness, and mild production conditions

Inactive Publication Date: 2007-12-26
褚平忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, what is needed for printing and dyeing is reactive dyes that have suitable directness and can make the non-fixed part easy to wash off. In addition, they should also show good color yield and high activity, especially should produce Dyeing effect with a high degree of fixation, the known alpha-type reactive dyes do not meet these requirements with regard to all properties

Method used

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  • Blue active dye of formazan, and preparation method
  • Blue active dye of formazan, and preparation method
  • Blue active dye of formazan, and preparation method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0014]

[0015] The above formula chromophore (copper complex of 5 amino-3-[3-phenyl-5-(2-carboxy-5sulfophenyl)-1-formaldehyde]-4-hydroxybenzenesulfonic acid) 0.05 The molecular weight is 29.8 grams, add 300ml of water, stir, and adjust the pH to neutral with NaOH solution, so that it is completely dissolved into a blue solution, and set aside.

[0016] 9.3 grams of cyanuric chloride 100%, 100 milliliters of ice water, a small amount of dispersant, stirring and beating at 0-5 ° C for 40-50 minutes, adding the above solution dropwise within 20-30 minutes, the temperature is controlled at 5-8 ° C, After the dropwise addition, stir for a while, adjust the pH to 6-6.5 with 5% NaHCO3 aqueous solution, and stir at a temperature of 5-8°C for 2 hours to complete a condensation reaction (control the end point with paper chromatography), then 100% 12.8 grams of 2 amino Add ethyl-2'sulfonyl-hydroxyethyl sulfate solution in a trickle, stir for 15 minutes, heat up to 40°C, keep warm at ...

example 2

[0019] Add 100% 12.8 grams of 2 aminoethyl-2'-sulfonyl-hydroxyethyl sulfate solution to the condensate of Example 1 and finish adding, heat up to 70 ° C, and use 5% Na 2 CO 3 Control the pH of the solution to 4.5-8, stir at 70-75°C for 6 hours, adjust the pH to about 5.5 after reaching the end point of triple shrinkage, desalt, and dry to obtain the blue dye of the following formula.

[0020]

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PUM

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Abstract

This invention discloses a method for preparing modified blue active dye. The structural formula of the modified blue active dye is shown in this invention, wherein, R1 is H or sulfonic acid group; R2 is sulfonic acid group; X is Cl, F, NH2CH2CH2SO2CH2CH2OSO3H or NH2CH2CH2SO2CH=CH2; Y is Cl, F, NH2CH2CH2SO2CH2CH2OSO3H or NH2CH2CH2SO2CH=CH2. The method comprises: performing a first condensation reaction between a dye and cyanuric chloride, performing a second condensation reaction with 2-aminoethyl-2'-sulfonyl-hydroxyethyl sulfate, then performing a third condensation reaction with an amino compound, desalting and drying, or directly desalting and drying without the third condensation reaction to obtain the modified blue active dye. The modified blue active dye has such advantages as high adhesiveness, mild production conditions, and easy industrialization.

Description

technical field [0001] The invention relates to an improved alpha-type blue reactive dye and a preparation method thereof. Background technique [0002] Recently, the dyeing industry using reactive dyes has higher requirements for dyeing quality and dyeing process profitability, so there is still a need for new reactive dyes with improved properties. [0003] At present, what is needed for printing and dyeing is reactive dyes that have suitable directness and can make the non-fixed part easy to wash off. In addition, they should also show good color yield and high activity, especially should produce With a dyeing effect with a high degree of fixation, the known alpha-type reactive dyes do not meet these requirements in all properties. Contents of the invention [0004] The invention provides a kind of existing formazan reactive dye by the improvement of active group, introduces a kind of improved formazan blue activity of 2-aminoethyl-2'-sulfonyl-hydroxyethyl sulfate acti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B50/10C09B62/503D06P1/38
Inventor 褚平忠
Owner 褚平忠