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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 impurities, and grinding and viscous, it is necessary to solve technical problems such as grinding and grading; Surface activation modification of bentonite micropowder to solve its compatibility and dispersion in polymer matrix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] After the coarse bentonite is dried and crushed, it is washed with multi-stage water to remove sand, screened and purified until the montmorillonite content is 95wt%, adding water and adjusting the pH value to 6, stirring and reacting for 2 hours, and then performing secondary purification until the montmorillonite content is 98wt% %, then use high-speed rotating high-pressure airflow shearing crushing in the high-pressure mill, the pressure of the high-pressure airflow is 0.3MPa, the rotating speed of the turntable is 12000 rpm, and it is pulverized to 3000 mesh ultrafine bentonite powder. The superfine bentonite powder passes through two activation modification chambers from top to bottom, and at 100°C and 0.7MPa, dissolves the SB-100 borate modifier and sprays it on the surface of the superfine bentonite powder. SB- The amount of 100 type borate modifier used is 2wt% of the superfine bentonite powder, and the surface activation modification is carried out by aerosol m...

Embodiment 2

[0027] After the coarse bentonite is dried and pulverized, it is washed with multi-stage water to remove sand, screened and purified until the montmorillonite content is 95.5wt%, adding water and adjusting the pH value to 7, stirring and reacting for 6 hours, and performing secondary purification until the montmorillonite content is 98.8wt%, using high-speed rotating high-pressure airflow shearing crushing in the high-pressure mill, the pressure of the high-pressure airflow is 0.25MPa, and the rotation speed of the turntable is 12500 rpm, and it is crushed to 4000 mesh ultrafine bentonite powder. The superfine bentonite powder passes through two activation modification chambers from top to bottom, and at 120°C and 0.5MPa, dissolves the SB-100 borate modifier and sprays it on the surface of the superfine bentonite powder. SB- The amount of 100 type borate modifier used is 3wt% of the superfine bentonite powder, and the surface activation modification is carried out by aerosol me...

Embodiment 3

[0029] After the coarse bentonite is dried and crushed, it is washed with multi-stage water to remove sand, screened and purified until the content of montmorillonite is 96wt%, adding water and adjusting the pH value to 8, stirring and reacting for 9 hours, and then performing secondary purification until the content of montmorillonite is 98.5% % by weight, and then use high-speed rotating high-pressure airflow shearing pulverization, the pressure of high-pressure airflow is 0.15MPa, the material rotation speed is 12800 rpm, and pulverized to 5000 mesh ultrafine bentonite powder. The ultrafine bentonite powder passes through two activation modification chambers from top to bottom, and at 150°C and 0.4MPa, dissolves the SB-100 type borate modifier and sprays it on the surface of the ultrafine bentonite powder. SB- The amount of 100-type borate modifier is 2.5wt% of the superfine bentonite powder, and the surface is activated and modified by aerosol method, so that the surface of...

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PUM

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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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