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Preparation method for toughening type leather tanning agent

A strong and leather-based technology, applied in the field of leather tanning agent preparation, can solve the problems of insufficient stability of the molecular cross-linking structure of non-chrome tanning agents and skin collagen, and it is difficult to meet the good performance of finished leather, achieving strength and Improved toughness, reduced dosage, improved heat and humidity stability

Inactive Publication Date: 2009-09-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the non-chrome tanning agent developed by traditional methods is not stable enough to cross-link the structure of collagen molecules, and it is difficult to meet the requirements of good performance of finished leather.
Therefore, so far, there is no new tanning agent that can completely replace chrome at home and abroad, and chrome-free and low-chrome tanning agents are still the research focus of the leather industry at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: first get 50 parts of distilled water by mass parts and stir and add 0.8 parts of montmorillonite and mix and continue to stir for 30min and then let stand for 24h, stir again for 30min to obtain montmorillonite solution; then add montmorillonite solution by mass parts 29.5 parts of methacrylic acid were stirred for 20 minutes, ultrasonically treated for 20 minutes, and heated in a water bath. After the temperature was raised to 60°C, stirred for 5 hours, and then ultrasonically treated for 10 minutes, 0.8 parts of acrolein and 1.5 parts of hydrogen sulfite were added to the cold water bath Sodium, stir evenly, use sodium hydroxide to adjust the pH value of the system to 3.5 to obtain a mixed solution; finally take 2.3 parts of ammonium persulfate and 0.3 parts of isopropanol in parts by mass and dissolve them in 20 parts of water to make ammonium persulfate and isopropanol Mix the mixed solution with the aqueous solution of ammonium persulfate and isopropa...

Embodiment 2

[0012] Embodiment 2: first get 50 parts of distilled water by mass parts and stir and add 1.2 parts of montmorillonite and mix and continue to stir for 30min, then let stand for 24h, stir again for 30min to obtain montmorillonite solution; then add montmorillonite solution by mass parts 30 parts of methacrylic acid were stirred for 20 minutes, ultrasonically treated for 20 minutes, and heated in a water bath. After the temperature was raised to 60°C, stirred for 5 hours, and then ultrasonically treated for 10 minutes, 0.5 parts of acrolein and 1.2 parts of hydrogen sulfite were added to the cold water bath Sodium, stir evenly, use sodium hydroxide to adjust the pH value of the system to 3.3 to obtain a mixed solution; finally take 2.1 parts of ammonium persulfate and 0.3 parts of isopropanol in parts by mass and dissolve them in 20 parts of water to make ammonium persulfate and isopropanol Mix the mixed solution with the aqueous solution of ammonium persulfate and isopropanol, ...

Embodiment 3

[0013] Embodiment 3: first get 50 parts of distilled water by mass parts and stir and add 1.4 parts of montmorillonite and mix and continue to stir for 30min and then let stand for 24h, stir again for 30min to obtain montmorillonite solution; then add montmorillonite solution by mass parts 28.8 parts of methacrylic acid were stirred for 20 minutes, ultrasonically treated for 20 minutes, and heated in a water bath. After the temperature was raised to 60°C, stirred for 5 hours, and then ultrasonically treated for 10 minutes, 1.0 parts of acrolein and 1.8 parts of hydrogen sulfite were added to the cold water bath Sodium, stir evenly, use sodium hydroxide to adjust the pH value of the system to 3.2 to obtain a mixed solution; finally take 2.6 parts of ammonium persulfate and 0.3 parts of isopropanol in parts by mass and dissolve them in 20 parts of water to make ammonium persulfate and isopropanol Mix the mixed solution with the aqueous solution of ammonium persulfate and isopropa...

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Abstract

The invention relates to a preparation method for a leather tanning agent, in particular to a preparation method for a leather tanning agent with function of strengthening and toughening collagenous fibers. The leather tanning process is a qualitative change process converting raw hide into leather, and can endow the leather with good heat and humidity resistant stability, flexibility and physical and mechanical properties; however, a chrome tanning agent commonly adopted has serious harm to the environment, while a conventional non-chrome tanning agent is hard to meet the requirement on good service performance of the leather. The preparation method takes montmorillonite and acrylic monomers as raw materials, and adopts a monomer in-situ intercalation polymerization method to synthesize the toughening type leather tanning agent; and the toughening type leather tanning agent is used for tanning the leather, can greatly improve the strength and toughness of crust leather, and can reduce the dosage of the chrome tanning agent by 75 percent.

Description

technical field [0001] The invention relates to a preparation method of a leather tanning agent, in particular to a preparation method of a leather tanning agent capable of strengthening and toughening collagen fibers. Background technique [0002] The strength and toughness of leather are an important index to measure the wearability of leather. At present, the application range of leather is greatly restricted by its strength and toughness. Because the strength and toughness of some parts cannot meet the requirements, the utilization rate of the whole leather is low, resulting in great waste. If the strength and toughness of the leather can be greatly improved, not only the leather can be used in a wider range, but also the leather can be used to a greater extent. [0003] On the other hand, chromium pollution is one of the three major pollution sources in tanning. In conventional chrome tanning, only about 70% of the chromium salt is absorbed by the skin, and the rest e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/22C08F220/06C08F2/44C08K3/34
Inventor 鲍艳马建中徐群娜李娜鄂涛王彦利
Owner SHAANXI UNIV OF SCI & TECH
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