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Multi-active-group red dye with high fixation rate and high chlorine fastness for printing and preparation method thereof

A technology of chlorine fastness and reactive dyes, applied in reactive dyes, dyeing methods, azo dyes, etc., can solve the problems of reactive chlorine oxidative damage, poor stability of chlorine resistance, discoloration, etc., to increase stability and improve resistance. Chlorine performance, the effect of improving the ability to resist effective chlorine

Active Publication Date: 2021-04-20
江苏德美科化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After dyeing fibers with reactive dyes, the dyed fabrics will fade when immersed in water containing active chlorine, which may be because some parts of the dye (such as -N=) have poor chlorine resistance stability and are easily oxidized by active chlorine.

Method used

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  • Multi-active-group red dye with high fixation rate and high chlorine fastness for printing and preparation method thereof
  • Multi-active-group red dye with high fixation rate and high chlorine fastness for printing and preparation method thereof
  • Multi-active-group red dye with high fixation rate and high chlorine fastness for printing and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] An embodiment provided by the present invention: a multi-reactive red dye with high color fixation rate and high chlorine fastness for printing, the reactive red dye is a compound shown in general structural formula I-1;

[0042]

[0043] The preparation method of the compound shown in the above-mentioned general formula I-1 is carried out according to the following process, and the specific steps include:

[0044] (1) Preparation of J-acid monoazo orange reactive dyes

[0045] A1: Add 36.1 g of 100% 4-β-ethylsulfone sulfate aniline-2-sulfonic acid, 200 g of ice and 20 mL of water into a 1000 mL beaker, and ice grind for 2 hours. Add 12.2 g of industrial hydrochloric acid (30%) and continue stirring for 1 hour. Dissolve 7.1g of 100% solid sodium nitrite in 30mL of water, and slowly add it dropwise to the system. During the dropwise addition, keep the reaction solution so that the Congo red test paper is slightly blue, and the KI test paper is slightly blue. After t...

Embodiment 2

[0056] An embodiment provided by the invention: a multi-reactive red dye with high color fixation rate and high chlorine fastness for printing, the reactive red dye is a compound shown in general structural formula I-2;

[0057]

[0058] In the present embodiment, the preparation method of reactive red dye I-2 and the beating device in the B1 step in the preparation method of reactive red dye are the same as in Example 1, the difference is that the difference is that N-methyl J acid replaces I-1 The J acid in the preparation step (1) prepares the corresponding reactive red dye, and the reactive red dye I-2 replaces the reactive dye I-1 to prepare the corresponding commercial dye.

Embodiment 3

[0060] An embodiment provided by the invention: a kind of multi-reactive red dye with high color fixation rate and high chlorine fastness for printing, the reactive red dye is a compound shown in general structural formula I-3:

[0061]

[0062] In the present embodiment, beating device is the same as embodiment 1 in the preparation method of reactive red dye I-3 and B1 step in the preparation method of reactive red dye, difference is that N-sulfomethyl J acid replaces I-1 preparation step ( 1) The J acid in 1) prepares the corresponding reactive red dye, and the reactive red dye I-3 replaces the reactive red dye I-1 to prepare the corresponding commercial dye.

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Abstract

The invention discloses a multi-active-group red dye with high fixation rate and high chlorine fastness for printing and a preparation method thereof, the multi-active-group red dye comprises a compound as shown in a structural general formula I, in the structural general formula I, R1 is-H or-AO3H; R 2 is-H; X is Cl; and M is Na. The method comprises the following steps: (1) preparing a J acid monoazo orange reactive dye; (2) preparing a J acid bisazo red reactive dye; and (3) preparing the multi-active-group red dye g with high fixation rate and high chlorine fastness. In order to improve the stability of azo bonds in a chromophoric body system of the reactive red dye, 4-beta-ethyl sulfuryl sulfate aniline-2-sulfonic acid and m-phenylenediamine compounds with sulfonic acid groups at the ortho-position of amino are selected as diazo components, and the azo bond ortho-positions in the final molecular structure of the prepared bis-azo active red dye all have sulfonic groups and can form hydrogen bonds with the azo bonds, so that the stability of the azo bonds is increased, and the azo active red dye can effectively resist the oxidation of effective chlorine in an environmental medium.

Description

technical field [0001] The invention relates to the technical field of reactive dyes, in particular to a multi-reactive red dye with high color fixation rate and high chlorine fastness for printing and a preparation method thereof. Background technique [0002] Reactive dyes have complete chromatograms and rich varieties, and are widely used in the dye application of cellulose fibers and protein fibers. Because reactive dyes contain reactive groups in their molecular structure, they can react with hydroxyl groups on cellulose fibers or amine groups on protein fibers under alkaline conditions to bond covalently to fibers. Therefore, after dyeing with reactive dyes The wet rubbing fastness of the fiber is superior. Since reactive dyes are water-soluble dyes and the dyeing medium is water, the hydrolysis of reactive dyes under alkaline conditions is inevitable. The hydrolyzed dye cannot further react with the fiber, and remains in the water, resulting in a large amount of col...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B62/513C09B67/24C09B67/36D06P1/382D06P1/384D06P3/66
Inventor 杨晶晶刘儒初张坤明严怡王小军
Owner 江苏德美科化工有限公司
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