Preparation technology of vinyl polymer/modified montmorillonoid nano composite tanoing agent

A vinyl polymer, compound tanning agent technology, applied in animal husbandry, chemical treatment of small raw hides/large raw hides/leather hides/furs, applications, etc., to achieve the effect of high exhaust rate, good performance and obvious thickening

Inactive Publication Date: 2005-10-26
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no related reports on the introduction of polymer-based montmorillonite nanocomposites into the field of leather tanning.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1, 1) Cetyltrimethylammonium bromide modified montmorillonite: First, montmorillonite was added to deionized water at a mass percentage of 5%, and the montmorillonite was stirred to form a uniform colloidal liquid. Treat with ultrasonic for 60 minutes, then add cetyltrimethylammonium bromide measured at 90mmol / 100g of montmorillonite; stir at 90℃ for 2 hours, and finally treat with ultrasonic for 30 minutes again, which is cetyl Montmorillonite modified with trimethylammonium bromide;

[0018] 2) Preparation of vinyl polymer: First, mix acrylic acid, acrylonitrile, ethyl acrylate and isopropanol to dissolve in deionized water to prepare 8% acrylic acid, 12% acrylonitrile, and 1% by mass. For a mixture of ethyl acrylate and 1% isopropanol, add half of the mixture to 78% of the total mass of the mixture in deionized water. After the temperature is raised to 75°C, add the other half of the mixture and the acrylic acid and ethyl acrylate. , 10% of the total mass of acry...

Embodiment 2

[0021]Example 2: 1) Cetyltrimethylammonium bromide modified montmorillonite: First, montmorillonite was added to deionized water at a mass percentage of 15%, and the montmorillonite was stirred to form a uniform colloidal liquid. Treat with ultrasonic for 45 minutes, then add cetyltrimethylammonium bromide measured at 110mmol / 100g of montmorillonite; stir at 70°C for 3 hours, and finally treat with ultrasonic again for 55 minutes, which is cetyl Montmorillonite modified with trimethylammonium bromide;

[0022] 2) Preparation of vinyl polymer: First, acrylic acid, acrylonitrile, ethyl acrylate and isopropanol are mixed and dissolved in deionized water to prepare acrylic acid with a mass percentage of 12%, 10% acrylonitrile, 1.2% A mixture of ethyl acrylate and 1.8% isopropanol, add half of the mixture to 75% of the total mass of the mixture in deionized water, and after heating to 76°C, add the other half of the mixture and the acrylic acid and ethyl acrylate. The water-soluble ini...

Embodiment 3

[0025] Example 3: 1) Cetyltrimethylammonium bromide modified montmorillonite: First, montmorillonite was added to deionized water at a mass percentage of 8%, and the montmorillonite was stirred to form a uniform colloidal liquid. Treat with ultrasonic for 30 minutes, then add cetyltrimethylammonium bromide measured at 100mmol / 100g of montmorillonite; stir at 85°C for 4 hours, and finally treat with ultrasonic again for 40 minutes, which is cetyl Montmorillonite modified with trimethylammonium bromide;

[0026] 2) Preparation of vinyl polymer: First, acrylic acid, acrylonitrile, ethyl acrylate and isopropanol are mixed and dissolved in deionized water to prepare acrylic acid with a mass percentage of 9%, 11% acrylonitrile, 1.5% A mixture of ethyl acrylate and 4% isopropanol, add half of the mixture to 74.5% of the total mass of the mixture in deionized water. After the temperature is raised to 77°C, add the other half of the mixture and the acrylic acid and ethyl acrylate. , Acrylo...

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PUM

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Abstract

A process for preparing the nano-class composite tanning agent includes using ammonium hexadecane bromide to modify Na-base montmorillonite, using vinyl monomer (acrylic acid, acrylonitrile, or ethyl acrylate) to prepare vinyl polymer, and combounding them together by solution stripping-adsorption method. Its advantages are high effect on raising the shrinking temp of sheep leather to 76 deg.C and increasing leather thickness, and high air and moisture permeability of leather.

Description

Technical field [0001] The invention relates to a preparation process of a nano composite material for tanning raw hides, in particular to a preparation process of a vinyl polymer / modified montmorillonite nano composite tanning agent. Background technique [0002] The leather industry is closely related to human life and the development of the national economy. The rapid development of the leather industry in China over the past two decades has not only brought us wealth, but also made us see shocking figures: my country’s tanning industry discharges approximately 70 million tons of wastewater per year (including 14,000 tons of sulfides and chromium). 38,000 tons of salt, 210,000 tons of suspended solids, COD Cr 350,000 tons, BOD s 940,000 tons), protein solid waste is about 700,000 tons (see Liu Bailing, Zhang Mingrang. Research on Green Chemistry in the Ecologicalization of my country's Leather Industry. Beijing Leather. 2000(22): 50-52). Among these pollutants, chromium is the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/44C08F20/00C08K9/04C14C3/22
Inventor 马建中储芸杨宗邃陈新江吕斌鲍艳吕庆强刘凌云
Owner SHAANXI UNIV OF SCI & TECH
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