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Method of preparing environment friendly incrassation type nano-composite tanning agent for leather

A compound tanning agent and nano-technology, which is applied in the field of preparation of environmentally friendly thickened nano-composite tanning agents for leather, can solve problems such as low-end products are difficult to survive, and achieve the effect of improving leather profits, increasing profits, and high absorption rate

Inactive Publication Date: 2009-08-19
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country is recognized as a major leather producing country in the world, and the foreign exchange earnings of the leather industry have always been ranked first in the light industry. With the emergence of factors, it will be difficult for enterprises to survive in the future by reproducing low-end products with low added value.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: 1) preparation of triethanolamine modified maleic anhydride

[0015] Mix 14.9g of triethanolamine and 14.4g of acrylic acid and heat up to 50°C, then add 0.15g of catalyst p-toluenesulfonic acid, heat up to 90°C, and then add triethanolamine to maleic anhydride in a molar ratio of 1:2 Maleic anhydride was incubated for 2 hours, the modified product was cooled to 50°C, and deionized water was added to adjust the solid content to 50% to obtain triethanolamine-modified maleic anhydride;

[0016] 2) Preparation of methacrylic acid-modified maleic anhydride / montmorillonite nanocomposite tanning agent

[0017] Disperse sodium montmorillonite (Na-MMT) in 100mL deionized water to make a solution with a mass concentration of 10%, stir at a constant temperature of 30°C for 60min, let it stand overnight, and add Na-MMT at 50°C the next day Potassium persulfate of quality such as montmorillonite (Na-MMT), fully stirred, ultrasonic treatment, and dried to obtain a com...

Embodiment 2

[0020] Embodiment 2: 1) preparation of triethanolamine modified maleic anhydride

[0021] Mix 14.9g of triethanolamine and 14.4g of acrylic acid and heat up to 50°C, then add 0.25g of catalyst p-toluenesulfonic acid, heat up to 90°C, and then add triethanolamine to maleic anhydride in a molar ratio of 1:3 Maleic anhydride was incubated for 2.5 hours, the modified product was cooled to 50°C, and deionized water was added to adjust the solid content to 50% to obtain triethanolamine-modified maleic anhydride;

[0022] 2) Preparation of methacrylic acid-modified maleic anhydride / montmorillonite nanocomposite tanning agent

[0023] Disperse sodium montmorillonite (Na-MMT) in 100mL deionized water to make a solution with a mass concentration of 10%, stir at a constant temperature of 30°C for 60min, let it stand overnight, and add Na-MMT at 50°C the next day Potassium persulfate of quality such as montmorillonite (Na-MMT), fully stirred, ultrasonic treatment, and dried to obtain a c...

Embodiment 3

[0026] Embodiment 3: 1) preparation of triethanolamine modified maleic anhydride

[0027] Mix 14.9g of triethanolamine and 14.4g of acrylic acid and heat up to 50°C, then add 0.20g of catalyst p-toluenesulfonic acid, heat up to 90°C, and then add triethanolamine to maleic anhydride in a molar ratio of 1:1 Maleic anhydride was incubated and reacted for 3 hours, the modified product was cooled to 50°C, and deionized water was added to adjust the solid content to 50% to obtain triethanolamine-modified maleic anhydride;

[0028] 2) Preparation of methacrylic acid-modified maleic anhydride / montmorillonite nanocomposite tanning agent

[0029] Disperse sodium montmorillonite (Na-MMT) in 100mL deionized water to make a solution with a mass concentration of 10%, stir at a constant temperature of 30°C for 60min, let it stand overnight, and add Na-MMT at 50°C the next day Potassium persulfate of quality such as montmorillonite (Na-MMT), fully stirred, ultrasonic treatment, and dried to ...

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PUM

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Abstract

The invention relates to a method for preparing leather use environment-friendly thickening type nano composite tanning agent which takes trolamine modified maleic anhydride, methacrylic acid and montmorillonite as raw materials, and adopts a load evocating agent method to prepare the leather use environment-friendly thickening type nano composite tanning agent. Raw sheep skin can be thicken by 112% by using the tanning agent, and crust leather can be thicken by 33% after being tanned by 2% of chromium powder, so that one leather can be changed into multiple leathers, thus remarkably increasing profits and ensuring the absorbing rate of chromium to be higher. Therefore, the nano composite tanning agent can improve the profits of leather, and is environment-friendly and has good performance.

Description

technical field [0001] The invention relates to a preparation method of a nano-composite tanning agent used for leather retanning, in particular to a preparation method of an environment-friendly thickening nano-composite tanning agent for leather. Background technique [0002] my country is recognized as a major leather producing country in the world, and the foreign exchange earnings of the leather industry have always been ranked first in the light industry. With the emergence of factors, it will be difficult for enterprises to survive in the future to reproduce low-end products with low added value. (Tian Mei. Analysis of the current situation of China's leather industry and development strategies [J]. China Leather. 2008, 37(1): 42-44.) One of the main factors affecting the added value of products is the chemical used in the processing process. Taste. [0003] A large amount of waste water containing chromium and sulfur produced in tanning production has caused serious...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/08
Inventor 马建中鄂涛鲍艳吕斌
Owner SHAANXI UNIV OF SCI & TECH
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