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Preparation method of multifunctional hydrotalcite/polymer nanocomposite additive for leather

A compound additive, water-soluble polymer technology, applied in small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, leather impregnation, etc. Problems such as poor dispersion performance of hydrotalcite can improve the thickening rate and mechanical properties, improve the quality of leather, and improve the depth of dyeing.

Active Publication Date: 2018-06-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since leather processing is carried out with water as the medium, the poor dispersion of hydrotalcite in water will limit its application in the leather industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Add 45g of acrylic acid, 4.8g of ammonium persulfate, and 120g of distilled water into a three-necked flask equipped with a stirrer and a condensing device, dissolve 15g of allyl sodium sulfonate in 30g of water, and pour the Sodium allyl sulfonate was added dropwise for 40 minutes, reacted at constant temperature for 5 hours, cooled, and discharged to obtain a water-soluble polymer. Then take 30g of water-soluble polymer in a three-necked flask, add 0.15g of hydrotalcite, stir at a constant speed for 2 hours at a temperature of 40°C, then place it in an ultrasonic disperser, adjust the ultrasonic power to 360W, and discharge the material after ultrasonication for 10 minutes to obtain a multifunctional Hydrotalcite / polymer nanocomposite additive.

example 2

[0024] Add 45g of acrylic acid, 4.8g of ammonium persulfate, and 120g of distilled water into a three-necked flask equipped with a stirrer and a condensing device, dissolve 15g of allyl sodium sulfonate in 30g of water, and pour the Sodium allyl sulfonate was added dropwise for 40 minutes, reacted at constant temperature for 5 hours, cooled, and discharged to obtain a water-soluble polymer. Then take 30g of water-soluble polymer in a three-necked flask, add 0.45g of hydrotalcite, stir at a constant speed for 2.5h at a temperature of 40°C, then place it in an ultrasonic disperser, adjust the ultrasonic power to 360W, and discharge the material after ultrasonication for 30min to obtain poly Functional hydrotalcite / polymer nanocomposite additive.

example 3

[0026] Add 45g of acrylic acid, 4.8g of ammonium persulfate, and 120g of distilled water into a three-necked flask equipped with a stirrer and a condensing device, dissolve 15g of allyl sodium sulfonate in 30g of water, and pour the Sodium allyl sulfonate was added dropwise for 40 minutes, reacted at constant temperature for 5 hours, cooled, and discharged to obtain a water-soluble polymer. Then take 30g of water-soluble polymer in a three-necked flask, add 0.75g of hydrotalcite, stir at a constant speed for 4h at a temperature of 40°C, then place it in an ultrasonic disperser, adjust the ultrasonic power to 480W, and discharge the material after ultrasonication for 40min to obtain a multifunctional Hydrotalcite / polymer nanocomposite additive.

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PUM

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Abstract

The invention relates to a multifunctional hydrotalcite / polymer nanocomposite auxiliary agent for leather and a preparation method thereof. Hydrotalcite has poor dispersibility in water, and its polymers are discolored after being applied to leather. The invention utilizes acrylic acid, ammonium persulfate and sodium allyl sulfonate to prepare water-soluble polymers, adds hydrotalcite for ultrasonic reaction, and obtains multifunctional hydrotalcite / polymer nanometer composite additives. The multifunctional hydrotalcite / polymer nanocomposite auxiliary agent prepared by the present invention can reduce the environmental pollution of tanning waste liquid; moreover, the positively charged hydrotalcite slab layer is beneficial to anionic dyes and fatliquor in later stage retanning, dyeing and fatliquoring. The absorption of chemical materials such as fat agent can ensure the quality of finished leather.

Description

technical field [0001] The invention relates to a pickling tanning auxiliary agent for leather, in particular to a multifunctional hydrotalcite / polymer nanocomposite auxiliary agent for leather and a preparation method thereof. Background technique [0002] Polycarboxyl polymers are often used in the high-absorption chrome tanning process of leather making, but because they contain a large amount of anions, when the leather is combined with anionic polymers, the combination points of anionic materials and skin collagen are reduced. On the one hand, it will The so-called "fading" phenomenon affects the dye uptake rate of dyes. On the other hand, it is also not conducive to the penetration and combination of chemical materials such as anionic fatliquor, which affects the quality of finished leather. [0003] Hydrotalcite-like materials are a class of layered compounds composed of negatively charged anions (interlayer anions) and positively charged metal hydroxides (main layer)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F228/02C14C3/22
CPCC08F220/06C14C3/22C08F228/02C08F120/06C08K3/26C08K2003/267C14C1/08C14C9/02C14C11/00C08L33/02C08F2/46C08F2/56C08F20/00
Inventor 马建中贾潞吕斌高党鸽
Owner SHAANXI UNIV OF SCI & TECH