Preparation method of modified ultrafine bentonite, prepared modified ultrafine bentonite and application thereof

An ultra-fine bentonite, modified technology, applied in the direction of dyeing physical treatment, dyeing low-molecular-weight organic compound treatment, fibrous filler, etc. The effect of uniformity, improved anti-aging performance and increased service life

Active Publication Date: 2012-09-12
SHANDONG HUAWEI BENTONITE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are two bottleneck problems in the preparation of nano-scale ultrafine bentonite composite polymer materials: one is the preparation of ultrafine bentonite, because of its high water content in the mineral body, many

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1

[0025] After the crude bentonite is dried and crushed, it is washed with multi-stage water to remove sand, and then filtered and purified to a smectite content of 95wt%. Add water and adjust the PH value to 6, stir and react for 2 hours, and then perform a second purification to a smectite content of 98wt. %, and then use high-speed rotating high-pressure air shearing crushing in the high-pressure mill, the pressure of the high-pressure air flow is 0.3MPa, the rotating speed of the turntable is 12000 rpm, and it is crushed to 3000 mesh ultra-fine bentonite powder. The ultra-fine bentonite powder is passed through two activation modification chambers from top to bottom. The SB-100 borate modifier is melted and sprayed on the surface of the ultra-fine bentonite powder at 100°C and 0.7MPa. The use amount of 100 type borate modifier is 2wt% of the ultrafine bentonite powder. The surface activation modification is carried out by aerosol method, so that the surface o...

Example Embodiment

[0026] Example 2

[0027] After the coarse bentonite is dried and crushed, it is washed with multi-stage water to remove sand, and then filtered and purified to a smectite content of 95.5% by weight. Add water and adjust the PH value to 7, stir and react for 6 hours, and then perform a second purification to a smectite content of 98.8wt%, high-speed rotating high-pressure airflow shearing crushing is used in the high-pressure mill, the pressure of the high-pressure airflow is 0.25MPa, the rotating speed of the turntable is 12,500 rpm, and it is crushed to 4000 mesh ultrafine bentonite powder. The ultra-fine bentonite powder is passed through two activation modification chambers from top to bottom. The SB-100 borate modifier is melted and sprayed on the surface of the ultra-fine bentonite powder at 120°C and 0.5MPa. The dosage of 100 type borate modifier is 3wt% of the ultrafine bentonite powder. The surface activation modification is carried out by aerosol method, so that the sur...

Example Embodiment

[0028] Example 3

[0029] After the rough bentonite is dried and crushed, it is washed with multi-stage water to remove sand, and then filtered and purified to a montmorillonite content of 96% by weight. Add water and adjust the PH value to 8, stir and react for 9 hours, and then conduct a second purification to a montmorillonite content of 98.5 wt%, and then use high-speed rotating high-pressure airflow shearing crushing, high-pressure airflow pressure 0.15MPa, material rotation speed 12800 rpm, crushed to 5000 mesh ultra-fine bentonite powder. The ultra-fine bentonite powder is passed through two activation modification chambers from top to bottom. The SB-100 borate modifier is melted and sprayed on the surface of the ultra-fine bentonite powder at 150℃ and 0.4MPa. The use amount of 100 type borate modifier is 2.5wt% of the ultrafine bentonite powder, and the surface activation modification is carried out by aerosol method, so that the surface of the powder is fully wetted and ...

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Abstract

The invention discloses a preparation method of modified ultrafine bentonite, prepared modified ultrafine bentonite and application thereof. The preparation method comprises the following steps: (1), drying and crushing crude bentonite; performing multi-stage water washing, and removing sander; purifying the bentonite till the montmorillonite content is above 95wt%; adding water, and regulating PH to 7 plus or minus 1; stirring and reacting for 1-12 hours; purifying the bentonite secondarily till the montmorillonite content is above 98wt%; and pulverizing to obtain 3000-5000-mesh ultrafine bentonite powder; and (2), at a temperature of 100-150 DEG C, pressurizing, and performing surface activation modification by using a boric acid ester modifier to obtain the modified ultrafine bentonite product. The problems of the compatibility and the dispersibility of the ultrafine bentonite and a polymer material are solved; and when the prepared modified ultrafine bentonite can be applied to processing of a rubber or plastic product, the prepared modified ultrafine bentonite can be used as a reinforcing agent and the service life of the produced rubber or plastic product can be prolonged by more than 30%.

Description

technical field [0001] The invention relates to the technical field of bentonite preparation, in particular to the preparation of a modified superfine bentonite. Background technique [0002] Carbon black (including black carbon black and white carbon black), calcium carbonate, talcum powder, kaolin and other inorganic additives need to be added in the processing of rubber or plastic products as rubber reinforcing agents and fillers. Among them, carbon black has been accompanied by the rubber industry. Especially the tire industry has experienced more than a century. With the vigorous development of polymer composite materials and the competition in the rubber material market, as well as the increase in people's demand for light-colored rubber products, carbon black, especially black carbon black, as the most important reinforcing agent, has been increasingly unable to meet the needs of the rubber market. need. And, along with the enhancement of people's environmental prot...

Claims

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Application Information

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IPC IPC(8): C09C1/42C09C3/04C09C3/08C08K9/10C08K3/34C08L21/00C08L101/00
Inventor 赵玉梅王松之陈占勋
Owner SHANDONG HUAWEI BENTONITE
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