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Production method of filling-foam leather composite tanning agent

A retanning agent and foaming technology, which is applied in the field of preparation of vinyl monomer copolymer leather retanning agent, can solve the problems of leather processing technology and process complexity, and achieve remarkable effect and unique synthesis process

Inactive Publication Date: 2008-06-25
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, the filling and foaming leather often requires experienced leather technicians to rely on the synergistic effect of related fillers, retanning agents and fatliquoring agents to achieve ideal results, which also makes the leather processing technology and process complication

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: First add polyethylene glycol-400 and oleic acid into the reactor, react at 80°C for 1.5 hours, then add maleic anhydride and continue the heat preservation reaction for 1.0 hours to obtain maleic acid polyethylene glycol Alcohol monooleate, the mass ratio of polyethylene glycol-400, oleic acid and maleic anhydride is 10:7:2.4; then maleic acid polyethylene glycol monooleate, propylene sulfonate , acrylamide and acrylonitrile are mixed at a mass ratio of 12.5:1:2:0.5 to make a mixed monomer, and then 25 parts by mass of pure water are added to the reactor, and when the water temperature is 70°C, slowly Add 16 parts by mass of mixed monomer and 20 parts of ammonium persulfate aqueous solution. The mass fraction of ammonium persulfate in the ammonium persulfate aqueous solution is 0.75%, and the addition time is 0.5 hours. , and finally adjust the pH value to 6.0 with a mass fraction of 30% sodium hydroxide solution.

Embodiment 2

[0009] Example 2: First add polyethylene glycol-400 and oleic acid into the reactor, react at 83°C for 1.6 hours, then add maleic anhydride and continue the heat preservation reaction for 1.2 hours to obtain maleic acid polyethylene glycol Alcohol monooleate, the mass ratio of polyethylene glycol-400, oleic acid and maleic anhydride is 10:7:2.4; then maleic acid polyethylene glycol monooleate, propylene sulfonate , acrylamide and acrylonitrile are mixed at a mass ratio of 12.5:1:2:0.5 to make a mixed monomer, and then 29 parts by mass of pure water are added to the reactor, and when the water temperature is 75°C, slowly Add 16 parts by mass of mixed monomers and 20 parts of ammonium persulfate aqueous solution, the mass fraction of ammonium persulfate in the ammonium persulfate aqueous solution is 0.75%, the addition time is 0.9 hours, after the addition is completed, keep the reaction at 82°C for 2.5 hours , and finally adjust the pH value to 6.1 with a mass fraction of 30% s...

Embodiment 3

[0010] Example 3: First add polyethylene glycol-400 and oleic acid into the reactor, react at 81°C for 1.9 hours, then add maleic anhydride and continue the heat preservation reaction for 1.5 hours to obtain maleic acid polyethylene glycol Alcohol monooleate, the mass ratio of polyethylene glycol-400, oleic acid and maleic anhydride is 10:7:2.4; then maleic acid polyethylene glycol monooleate, propylene sulfonate , acrylamide and acrylonitrile are mixed at a mass ratio of 12.5:1:2:0.5 to make a mixed monomer, and then 27 parts by mass of pure water are added to the reactor, and when the water temperature is 72°C, slowly Add 16 parts by mass of mixed monomers and 20 parts of ammonium persulfate aqueous solution, the mass fraction of ammonium persulfate in the ammonium persulfate aqueous solution is 0.75%, the addition time is 0.6 hours, after the addition is completed, keep the reaction at 85°C for 2.1 hours , and finally adjust the pH value to 6.5 with a mass fraction of 30% s...

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PUM

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Abstract

Production of filled foaming leather retanning agent is carried out by reacting polyglycol with oleic acid and maleic anhydride to obtain maleic polyglycol mono-oleate, polymerization reacting maleic polyglycol mono-oleate with propenyl-sulfosalt, acrylic amide and vinyl cyanide to obtain the final product. It touches soft and has excellent fallibility.

Description

technical field [0001] The invention relates to a preparation method of a vinyl monomer copolymer type leather retanning agent, in particular to a preparation method of a filling and foaming type leather retanning agent. Background technique [0002] my country is now the center of leather production and processing in the world, generating a large amount of foreign exchange and increasing millions of job opportunities for the country every year. In the process of leather production, hundreds of varieties of leather chemicals are needed. Among them, leather retanning agents are known as "alchemy" in leather production. Retanning agents with excellent performance can change the style of leather and improve the quality of leather. , significantly increase the added value and economic benefits of leather. It has always been a research hotspot and an urgent expectation of tanning enterprises to select a filling foaming leather retanning agent with good filling performance and a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C3/22
Inventor 吕生华李芳周志威
Owner SHAANXI UNIV OF SCI & TECH
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