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Method for synthesizing high molecular retanning dyeing auxiliary agents through enzyme catalysis

A technology for synthesizing polymers and dyeing auxiliaries, which is applied in dyeing, chemical treatment of small raw hide/large raw hide/leather skin/fur, textiles and papermaking, etc., to achieve the effect of fine grain, high absorption rate and good permeability

Inactive Publication Date: 2012-10-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, green retanning and dyeing auxiliaries with better application performance are relatively rare at present, and products with excellent performance and mass production are still under research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1: Dissolve 8 grams of 2,3-dihydroxynaphthalene-6-sodium sulfonate and 5.3 grams of p-aminobenzenesulfonic acid in 32 grams of deionized water, mix well and heat to 30°C, then neutralize the system with sodium bicarbonate When the pH reaches 7.6, add 3 ml of HRP solution with a concentration of 0.5 g / L, then add 6.8 g of hydrogen peroxide solution with a mass fraction of 30%, and control the dropping time for 1.5 hours. After the addition, continue to keep warm at 30°C React for 3 hours to get the polymer retanning and dyeing auxiliaries.

Embodiment 2

[0008] Example 2: Dissolve 9 grams of 2,3-dihydroxynaphthalene-6-sodium sulfonate and 4.2 grams of p-aminobenzenesulfonic acid in 36 grams of deionized water, mix well and heat to 30°C, then neutralize the system with sodium bicarbonate When the pH reaches 7.4, add 4 ml of HRP solution with a concentration of 0.5 g / L, and then add 6.2 g of hydrogen peroxide solution with a mass fraction of 30% dropwise, and control the dropping time for 1.8 hours. After the addition, continue to keep warm at 30°C React for 2.5 hours to get the polymer retanning and dyeing auxiliaries.

Embodiment 3

[0009] Example 3: Dissolve 10 grams of 2,3-dihydroxynaphthalene-6-sodium sulfonate and 3.3 grams of p-aminobenzenesulfonic acid in 38 grams of deionized water, mix well and heat to 30°C, then neutralize the system with sodium bicarbonate When the pH reaches 7.8, add 5 ml of HRP solution with a concentration of 0.5 g / L, and then dropwise add 7 g of hydrogen peroxide solution with a mass fraction of 30%, and control the dropping time for 1.5 hours. After the addition, continue to keep warm at 30°C React for 2.8 hours to obtain polymer retanning and dyeing auxiliaries.

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Abstract

The invention relates to a method for synthesizing high molecular retanning dyeing auxiliary agents through enzyme catalysis, which comprises the following steps: dissolving p-aminobenzene sulfonic acid and 2, 3-dihydroxy naphthalene-6-sodium sulfonate into de-ionized water, using a sodium bicarbonate solution for regulating the pH value of the system, and finally, obtaining the retanning dyeing auxiliary agents through co-polymerization reaction carried out under the horse radish peroxidase (HRP) catalysis. The invention uses HRP as catalysts of the polymerization reaction, and the HRP has the advantages of high efficiency, high selectivity and environment protection when being used for catalyzing the polymerization. The invention has the advantages that phenols or arylamines can carry out polymerization in ortho positions or para positions of hydroxide groups and amino groups for forming a polymer with directly connected C-C structures and large pi conjugated systems, the formaldehyde pollution in the traditional synthesized retanning agents is avoided, and at the same time, the products with the conjugated systems contain a large number of auxochromic groups such as -NH2, -OH and -SO3H and the like. Retanning leather is full and soft, and the dye absorption rate is higher than 99 percent, and in addition, the retanning dyeing auxiliary agents have obvious dyeing aid effect.

Description

technical field [0001] The invention relates to a preparation method of a polymer retanning and dyeing auxiliary, in particular to a method for synthesizing a polymer retanning and dyeing auxiliary by enzymatic catalysis. Background technique [0002] In leather chemicals, the condensate of phenol and formaldehyde is called a syntan. Since formaldehyde is one of the raw materials and the product contains formaldehyde, it will cause formaldehyde pollution during production and use. In recent years, traditional syntans Therefore, the development of formaldehyde-free green leather syntans has become a research hotspot, and formaldehyde-free leather syntans have great market demand and economic benefits. Leather dyeing can make the leather obtain pure color, and the color is bright, uniform and fast. In recent years, the market has higher and higher requirements for leather dyeing. In addition to the uniform color, there are also requirements for fullness of color, resistance t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P13/00D06P1/52C14C3/22
Inventor 吕生华马艳芬弓瑞闫小亮刘岗
Owner SHAANXI UNIV OF SCI & TECH
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