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Process method for preparing flame-retardant leather by using modified montmorillonite and modified hydrotalcite

A process method, montmorillonite technology, applied in leather impregnation, small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, etc. Human health, corrosiveness of hydrogen halide gas, etc.

Active Publication Date: 2021-10-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the flame retardants used in the leather industry are halogen flame retardants, which have the advantages of high flame retardant efficiency, low dosage, and low cost, but they generate a large amount of smoke, and the hydrogen halide gas released is corrosive and will produce Toxic carcinogens polybrominated benzoxins and polybrominated dibenzofurans, endangering human health

Method used

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  • Process method for preparing flame-retardant leather by using modified montmorillonite and modified hydrotalcite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to the claims of the patent 201910021792.3, a modified Zanthoxylum bungeanum seed oil / modified hydrotalcite nanocomposite fatliquor is prepared for future use;

[0027] According to the claims of the patent 201910434883.X, a modified Zanthoxylum bungeanum seed oil / modified montmorillonite nanocomposite fatliquoring agent was prepared for future use;

[0028] Take 100 parts by mass of goatskin wet blue leather and add it to the drum, add 300 parts by mass of water, wash with water at 40°C for 15 minutes; cool down to 35°C, add 200 parts by mass of water, add 1.0 parts by mass of sodium formate and 2.0 parts by mass Parts of baking soda, rotate for 100min, and neutralize the pH to 5.4; add 150 parts by mass of water, 3.5 parts by mass of modified Zanthoxylum bungeanum seed oil / modified hydrotalcite composite fatliquoring agent, heat up to 55°C and rotate for 60min , then add 10.5 parts by mass of modified Zanthoxylum bungeanum oil / modified montmorillonite fatliq...

Embodiment 2

[0030] According to the claims of the patent 201910021792.3, a modified Zanthoxylum bungeanum seed oil / modified hydrotalcite nanocomposite fatliquor is prepared for future use;

[0031] According to the claims of the patent 201910434883.X, a modified Zanthoxylum bungeanum seed oil / modified montmorillonite nanocomposite fatliquoring agent was prepared for future use;

[0032] Take 100 parts by mass of goatskin wet blue leather and add it to the drum, add 300 parts by mass of water, wash with water at 40°C for 15 minutes; cool down to 35°C, add 200 parts by mass of water, add 1.1 parts by mass of sodium formate and 1.7 parts by mass Parts of baking soda, rotate for 100min, and neutralize the pH to 5.5; add 150 parts by mass of water, 3.6 parts by mass of modified Zanthoxylum bungeanum seed oil / modified hydrotalcite composite fatliquoring agent, heat up to 55°C and rotate for 60min , then add 10.6 parts by mass of modified pepper seed oil / modified montmorillonite fatliquoring age...

Embodiment 3

[0034] According to the claims of the patent 201910021792.3, a modified Zanthoxylum bungeanum seed oil / modified hydrotalcite nanocomposite fatliquor is prepared for future use;

[0035] According to the claims of the patent 201910434883.X, a modified Zanthoxylum bungeanum seed oil / modified montmorillonite nanocomposite fatliquoring agent was prepared for future use;

[0036]Take 100 parts by mass of goatskin wet blue leather and add it to the drum, add 300 parts by mass of water, wash with water at 40°C for 15 minutes; cool down to 35°C, add 200 parts by mass of water, add 1.3 parts by mass of sodium formate and 1.6 parts by mass Parts of baking soda, rotate for 100min, and neutralize the pH to 5.5; add 150 parts by mass of water, 3.6 parts by mass of modified Zanthoxylum bungeanum seed oil / modified hydrotalcite composite fatliquoring agent, heat up to 55°C and rotate for 60min , then add 10.4 parts by mass of modified Zanthoxylum bungeanum oil / modified montmorillonite fatliqu...

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Abstract

The invention discloses a process method for preparing flame-retardant leather by using modified montmorillonite and modified hydrotalcite. The technical scheme is as follows: take goatskin wet blue leather and add it to a drum, add water, and wash it with water at 40°C for 15 minutes ; Cool down to 35°C, add water, add sodium formate and baking soda, rotate for 100min, and neutralize the pH to 5.4~5.6; add water to the drum, modified pepper seed oil / modified hydrotalcite composite fatliquoring agent, Heat up to 55°C and rotate for 60 minutes, then add modified pepper seed oil / modified montmorillonite fatliquoring agent and rotate for 60 minutes; add formic acid to adjust the pH to 3.8~4.0, wash with water, and take out the drum. In the present invention, LDH and MMT are synergistically applied to leather flame retardancy, and the fatliquoring process is optimized to realize the positive synergy of flame retardancy, which overcomes the shortcomings of traditional halogen flame retardants such as large amount of smoke and environmental pollution when burning .

Description

technical field [0001] The invention relates to a method for preparing a prickly ash seed oil-based fatliquoring agent for leather, in particular to a process for preparing flame-retardant leather by using modified montmorillonite and modified hydrotalcite. [0002] technical background [0003] With the increase in the amount of leather products, flame retardancy has become an important inspection index for leather. In the tanning process, fatliquoring is an important and indispensable process, and its purpose is to make the finished leather soft, comfortable and beautiful. However, fatliquoring will introduce oil into the leather, and most of the oils have poor thermal stability and are flammable, which is equivalent to introducing flammable components into the leather. When the leather is heated, the oil will easily migrate to the leather surface and become a "fuel" to promote combustion. . Researchers usually add flame retardants to fatliquoring to eliminate the adverse...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C9/02
CPCC14C9/02
Inventor 吕斌王岳峰雒康高党鸽马建中郭旭
Owner SHAANXI UNIV OF SCI & TECH