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A kind of reactive dye and preparation method thereof

A technology of reactive dyes and alkaline solution, applied in the field of leather dyeing, can solve the problem of difficult application of reactive dyes in leather dyeing, etc., and achieve the effects of improving the utilization rate of dyes, improving the dyeing fastness, and reducing the concentration of residual dyes

Active Publication Date: 2017-02-15
广州狮岭皮革皮具产业研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The reactive dye and the preparation method of the present invention can solve the problem that the existing reactive dye is difficult to apply to leather dyeing, improve the dyeing fastness of leather, and reduce the concentration of residual dye in dyeing waste liquid

Method used

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  • A kind of reactive dye and preparation method thereof
  • A kind of reactive dye and preparation method thereof
  • A kind of reactive dye and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take by weighing 13.32g diisopropanolamine and add the four-necked bottle, slowly warming up to 80 o C, then 9.8g of maleic anhydride was dissolved in 100 mL of dimethylformamide, slowly dropped into a four-neck flask, at 80 o C reaction 6h, cool down to 60 o C, use 30% NaOH solution to slowly neutralize to pH 9, then distill off dimethylformamide under reduced pressure to obtain hydroxyamide carboxylate.

[0019] After 44.75g active bright yellow K-4G is dissolved in 800g water, add in the above-mentioned hydroxyamide carboxylate of 25.3g, 80 o C reacted for 2 hours, after drying and grinding, a carboxyl yellow modified reactive dye was obtained. Among them, the molecular structural formula of Active Bright Yellow K-4G is:

[0020]

Embodiment 2

[0022] Take by weighing 13.32g diisopropanolamine and add the four-necked bottle, slowly warming up to 80 o C, then 9.8g of maleic anhydride was dissolved in 100 mL of dimethylformamide, slowly dropped into a four-neck flask, at 40 o C reaction 48h, cooling to 60 o C, use 30% NaOH solution to slowly neutralize to pH 9, then distill off dimethylformamide under reduced pressure to obtain hydroxyamide carboxylate.

[0023] After dissolving 22.4g active bright yellow K-4G in 400g water, add in the above-mentioned hydroxyamide carboxylate of 25.3g, 60 o C reacted for 4 hours, and after drying and grinding, a carboxyl yellow modified reactive dye was obtained.

Embodiment 3

[0025] Take by weighing 10.5g diethanolamine and add four-necked bottle, slowly warming up to 80 o C, then dissolve 10g of succinic anhydride in 100mL of dimethylacetamide, slowly drop into the four-necked flask, at 90 o C reaction 1h, cooling to 60 o C. Slowly neutralize to pH9 with 30% KOH solution, then distill off dimethylacetamide under reduced pressure to obtain hydroxyamide carboxylate.

[0026] After dissolving 61.5g reactive brilliant red X-3B in 615g water, add 22.7g of the above-mentioned hydroxyamide carboxylate, 95 o C reacted for 1h, after drying and grinding, a carboxyl red modified reactive dye was obtained. Among them, the molecular structural formula of Reactive Brilliant Red X-3B is:

[0027]

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Abstract

The invention discloses a reactive dye and a preparation method thereof. In order to achieve the above purpose, the reactive dye is prepared from a reactive dye and hydroxy amide carboxylate in a molar ratio N of 0.1: 1 to 2: 1, wherein the hydroxy amide carboxylate is prepared by neutralizing the pH value of a reaction product of hydramine and dicarboxylic anhydride in an equal molar ratio in a solvent to 8-10 by an alkaline solution. The method for preparing the reactive dye comprises the following steps: (1) taking the hydramine and the dicarboxylic anhydride in equal molar ratio to carry out amidation, neutralizing by using the alkaline solution until pH value is 8-10, and removing the solvent to obtain the hydroxy amide carboxylate; (2) reacting the hydroxy amide carboxylate with the reactive dye, and drying and grinding the product to obtain the reactive dye. The reactive dye and the preparation method of the reactive dye can be used for solving the problem that the existing reactive dye is hard to be applied in the leather dye; meanwhile, the color fastness of the leather is improved; the concentration of the residual dye of the dye waste solution is improved.

Description

technical field [0001] The invention relates to reactive dyes and a preparation method, in particular to a modification method for applying reactive dyes to leather and its products, so that the reactive dyes can be applied to leather dyeing. Background technique [0002] Dyeing is an important process in the leather production process, which plays an important role in imparting bright colors and beautiful appearance to the finished leather. In recent years, with the improvement of environmental protection requirements and social progress, people have put forward higher requirements for leather dyes, which not only require dyes to be lightfast, washable, friction-resistant, and firmly bonded, but also require dyes to have a higher absorption rate. Wastewater is easier to treat. However, at present, acid dyes and direct dyes in the textile industry are mainly used for dyeing in leather production. Such dyes can only be combined with skin collagen fibers in the form of ionic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B67/24D06P1/38D06P3/32
Inventor 王玉路胡才波焦利敏周南张小燕
Owner 广州狮岭皮革皮具产业研究中心有限公司
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