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Sio2 airgel/vinyl polymer composite high-absorption chrome tanning auxiliary agent and preparation method thereof

A vinyl polymer and aerogel technology, applied in small raw hide/big raw hide/leather/fur treatment, small raw hide/big raw hide/leather skin/fur chemical treatment, tanning treatment, etc., can solve problems that are difficult to use effectively Solve problems such as chromium-containing solid waste, upgrade the hazard level of chromium-containing pollutants, and aggravate chrome tanning agents, so as to achieve the effects of improving moisture and heat resistance stability, obvious thickening, and excellent performance

Active Publication Date: 2016-02-10
山东黎宁科技新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the tanning process, the tanning agent is the material that transforms raw hide into leather, and chrome tanning has experienced more than 100 years of development, and has now become the most important tanning method in light leather production. However, in the traditional chrome tanning method, chrome The absorption rate of the tanning agent is low, only about 60%~70%. The unabsorbed chromium is discharged into the waste water, and produces chromium-containing solid waste that is difficult to effectively use, and the trivalent chromium of the chrome tanning agent can be absorbed under certain conditions. It is transformed into hexavalent chromium, which is carcinogenic, which undoubtedly aggravates people's concerns about chrome tanning agents, and also escalates the harmfulness of chromium-containing pollutants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1: Add 45g of methacrylic acid and 227g of distilled water into the three-necked flask as a primer, and then heat it in a water bath. When the temperature reaches 80°C, add 45g of methacrylic acid and 7.2g of initiator dropwise for 40 minutes, react at constant temperature for 4 hours, cool, and release material to obtain vinyl polymerization high absorption chrome tanning auxiliaries;

[0021] Step 2: Take 60g of vinyl polymer tanning agent, put it under the dispersing sander and stir, slowly add 4.5g of SiO 2 Airgel, stirred at a constant speed for 30min, discharged to obtain SiO 2 Airgel / vinyl polymer high absorption chrome tanning aid.

[0022] In step one, the initiator is ammonium persulfate.

Embodiment 2

[0024] Step 1: Add 45g of methacrylic acid and 227g of distilled water into the three-necked flask as a primer, and then heat it in a water bath. When the temperature reaches 80°C, add 45g of methacrylic acid and 7.2g of initiator dropwise for 40 minutes, react at constant temperature for 4 hours, cool, and release material to obtain vinyl polymerization high absorption chrome tanning auxiliaries;

[0025] Step 2: Take 75g of vinyl polymer tanning agent, put it under the dispersing sander and stir, slowly add 2.5g of SiO 2 Airgel, stirred at a constant speed for 40min, discharged to obtain SiO 2 Airgel / vinyl polymer high absorption chrome tanning aid.

[0026] In step one, the initiator is ammonium persulfate.

Embodiment 3

[0028] Step 1: Add 45g of methacrylic acid and 227g of distilled water into the three-necked flask as a primer, and then heat it in a water bath. When the temperature reaches 80°C, add 45g of methacrylic acid and 7.2g of initiator dropwise for 40 minutes, react at constant temperature for 4 hours, cool, and release material to obtain vinyl polymerization high absorption chrome tanning auxiliaries;

[0029] Step 2: Take 90g of vinyl polymer tanning agent, put it under the dispersing sander and stir it, slowly add 0.6g SiO 2 Airgel, stirred at a constant speed for 50min, discharged to obtain SiO 2 Airgel / vinyl polymer high absorption chrome tanning aid.

[0030] In step one, the initiator is ammonium persulfate.

[0031] SiO prepared by the present invention 2 When airgel / vinyl polymer composite high-absorption chrome tanning auxiliaries and a small amount of chrome powder are used in cowhide tanning, the carboxyl group contained in its molecular chain can coordinate with the...

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Abstract

The invention relates to a composite high-absorption chrome tanning additive with a SiO2 aerogel / vinyl polymer and a preparation method of the composite high-absorption chrome tanning additive. A chrome tanning agent in a conventional chrome tanning method is low in absorption rate, chrome-containing solid wastes which are hard to effectively utilize can be generated when unabsorbed chrome is discharged into wastewater, and the environment can be polluted. The preparation method comprises the following steps: adding methacrylic acid and distilled water as a substrate into a three-opening flask, heating in a water bath, dropwise adding methacrylic acid and an initiator to react at normal temperature, cooling, and discharging, thereby obtaining a vinyl polymerization high-absorption chrome tanning additive; putting a vinyl polymer tanning agent into a dispersion grinding machine, stirring, slowly adding SiO2 aerogel, stirring at a uniform speed, and discharging, thereby obtaining the composite high-absorption chrome tanning additive with the SiO2 aerogel / vinyl polymer. When the chrome tanning additive is used for tanning cow leather together with a small amount of chrome powder, the carboxyl in the molecule chain can be coordinated with the chrome tanning agent, so that the cross-linking degree of the chrome tanning agent with collagen is increased, the hydrothermal resistance stability of collagen is effectively improved, and the complete sucking rate of chrome ions in a bath liquid is effectively increased.

Description

technical field [0001] The invention relates to a chrome tanning auxiliary agent and a preparation method thereof, in particular to a SiO 2 Airgel / vinyl polymer composite high-absorption chrome tanning auxiliary agent and its preparation method. Background technique [0002] With the rapid development of the leather industry, my country has become the manufacturing center and trading center of the world's leather industry. In the tanning process, the tanning agent is the material that transforms raw hide into leather, and chrome tanning has experienced more than 100 years of development, and has now become the most important tanning method in light leather production. However, in the traditional chrome tanning method, chrome The absorption rate of the tanning agent is low, only about 60%~70%. The unabsorbed chromium is discharged into the waste water, and produces chromium-containing solid waste that is difficult to effectively use, and the trivalent chromium of the chrome ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C3/22
CPCC14C3/22
Inventor 马建中贾潞吕斌高党鸽
Owner 山东黎宁科技新材料有限公司