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Preparation method of phenols and ethylene monomer copolymer type leather retanning agent

A technology of vinyl monomers and copolymers, which can be used in small raw hide/big raw hide/leather/fur treatment, small raw hide/big raw hide/leather skin/fur chemical treatment, animal husbandry, etc., and can solve complex processes and high costs. problem, to achieve the effect of high reaction conversion rate and specific three-dimensional structure

Inactive Publication Date: 2007-12-12
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, leather manufacturers mainly use special-effect retanning agents from German BASF and Bayer companies and special-effect fatliquoring agents from Derui to prepare light and soft leather, which is costly and complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Embodiment 1: first relative molecular mass is 40000, the horseradish peroxidase of 250 activity units / mg is made into the enzyme solution of 1.0mg / ml with deionized water, preserves at 4 ℃; Then in 80g deionized water Add 10g of phenol, after the phenol is completely dissolved, add 5g of hydrogen peroxide with a mass concentration of 3%, react for 30 minutes at 40°C, then add 15g of vinyl mixed monomer and 5mL of enzyme solution dropwise, the said vinyl mixed monomer Including 10g of acrylamide and 5g of acrylic acid, kept at 40°C for 3.5 hours, adjusted the pH of the system to 5.0 with sodium hydroxide solution, then added 12g of formaldehyde with a mass concentration of 30% and 13g of hydrogen sulfite with a mass concentration of 30% Sodium, continue to heat preservation reaction at 45 ℃ for 2 hours, to obtain phenols and vinyl monomer copolymer type leather retanning agent.

Embodiment 2

[0007] Embodiment 2: first relative molecular mass is 40000, the horseradish peroxidase of 250 activity units / mg is made into the enzyme solution of 1.3mg / ml with deionized water, preserves at 4 ℃; Then in 80g deionized water Add 11.5g of phenol, after the phenol is completely dissolved, add 6g of hydrogen peroxide with a mass concentration of 3%, react for 35 minutes at 40°C, then add 15g of vinyl mixed monomer and 5mL of enzyme solution dropwise, the said vinyl mixed monomer The body includes 10g of acrylamide and 5g of acrylic acid, and is incubated at 42°C for 3.3 hours. The pH value of the system is adjusted to 5.2 with sodium hydroxide solution, and then 10.5g of formaldehyde and 15g of 30% mass concentration are added. Sodium bisulfate, continue to heat preservation reaction at 42 ℃ for 2.3 hours, to obtain phenols and vinyl monomer copolymer type leather retanning agent.

Embodiment 3

[0008] Embodiment 3: first relative molecular mass is 40000, the horseradish peroxidase of 250 activity units / mg is made into the enzyme solution of 1.5mg / ml with deionized water, preserves at 4 ℃; Then in 80g deionized water Add 12g of phenol, after the phenol is completely dissolved, add 7g of hydrogen peroxide with a mass concentration of 3%, react for 50 minutes at 40°C, then add 15g of vinyl mixed monomer and 5mL of enzyme solution dropwise, the said vinyl mixed monomer Including 10g of acrylamide and 5g of acrylic acid, kept at 45°C for 3.0 hours, adjusted the pH of the system to 5.5 with sodium hydroxide solution, then added 11.5g of formaldehyde with a mass concentration of 30% and 12g of sulfurous acid with a mass concentration of 30% Sodium hydrogen, continue to heat preservation reaction at 40 DEG C for 2.5 hours to obtain phenols and vinyl monomer copolymer type leather retanning agent.

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PUM

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Abstract

The invention relates to a method for preparing retanning agent for leather. It comprises following steps: mixing horse radish peroxidase with deionized water to produce enzyme solution, adding phenol and horse radish peroxidase solution into deionized water, dropping hydrogen dioxide and mixture of acrylamide and acroleic acid monomer respectively, reacting at temperate condition, moderating pH with sodium-hydroxide, adding formaldehyde and sodium acid sulfite at light acidic condition for sulfiting reaction, getting copolymerized retanning agent for leather. The invention is characterized by specific synthetic process, and soft and light leather products that employs prepared retanning agent in this invention.

Description

technical field [0001] The invention relates to a preparation method of a leather retanning agent, in particular to a preparation method of a phenol and vinyl monomer copolymer type leather retanning agent. Background technique [0002] The leather industry is one of the main industries of my country's light industry. In recent years, the annual foreign exchange earnings from exports have exceeded 30 billion US dollars. my country is now also a veritable world tanning center and a big tanning country. The value of leather products is reflected in its natural materials, fashionable and diverse styles, and good performance. Leather with the characteristics of lightness and softness has become a fashion style in recent years and has become popular all over the world. The current light and soft style leather mainly relies on special effect retanning agent and special effect fatliquoring agent to achieve the purpose. At present, leather manufacturers mainly use special-effect r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/22C08F220/00C08F2/44
Inventor 吕生华刘岗
Owner SHAANXI UNIV OF SCI & TECH
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