Method for preparing single-piece talc powder

A talcum powder and monolithic technology, applied in chemical instruments and methods, silicates, fibrous fillers, etc., can solve the problems of talcum powder damage, affecting the application of talc powder, uncontrollable force of talc powder particles, etc.

Inactive Publication Date: 2018-03-30
GUILIN HAOXIN TECH SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chinese Patent Publication No. CN101678246A discloses a method for controlling the shape of talc particles. The method is to pulverize talcum powder in a homogenizer first, and then use a ball mill to peel off to obtain talcum powder. Although the talcum powder has controllable particle shape, whiteness However, due to the uncontrollable force on the talc powder particles during the peeling process of the ball mill, it will damage the talc powder sheet structure and affect the functionality of the talc powder, and only part of the talc powder particles are peeled off, which is low in efficiency. poor effect
[0008] According to the above, in the current methods of deep processing and modification of talcum powder, there is no peeling treatment method for talcum powder. Although talc powder is partially peeled off during the grinding process, the efficiency is low and the effect is poor. The talcum powder with lamellar structure will be damaged by mechanical force and other defects, resulting in low added value and poor functionality of talcum powder products. The filling amount in rubber, plastic, paper and other products is small. When the filling amount is large, the mechanical properties of the product and Decreased processing performance affects the application of talc powder in high value-added products

Method used

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  • Method for preparing single-piece talc powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) In parts by weight, add 10 parts of talc powder and 1 part of titanate coupling agent to a high-speed mixer, control the speed at 800 rpm, and disperse for 15 minutes to obtain a premix;

[0027] (2) Add the premix obtained in step (1) and the foaming agent composed of sodium lauryl sulfate, ammonium oxide, and water mixed in a mass ratio of 1:2:1 into a rotary homogenizer, and rotate The speed of the homogenizer is controlled at 1000rpm, the temperature is 60°C, and the talcum powder is peeled off step by step under the shearing action of the rotating blade to obtain the primary product of monolithic talc powder;

[0028] (3) The monolithic talc primary product obtained in step (2) is washed with water and acetone respectively and dried to obtain monolithic talc.

Embodiment 2

[0030] (1) In parts by weight, 12 parts of talcum powder and 1 part of aluminate coupling agent were added to a high-speed mixing mixer, the speed was controlled at 1200 rpm, and the premix was obtained by dispersing for 20 minutes;

[0031] (2) Add the premix obtained in step (1) and the foaming agent composed of sodium lauryl sulfate, ammonium oxide, and water mixed in a mass ratio of 1:3:2 into a rotary homogenizer, and rotate The speed of the homogenizer is controlled at 3000rpm, the temperature is 80°C, and the talcum powder is peeled off step by step under the shearing action of the rotating blade to obtain the primary product of monolithic talc powder;

[0032] (3) The monolithic talc primary product obtained in step (2) is washed with water and acetone respectively and dried to obtain monolithic talc.

Embodiment 3

[0034] (1) In parts by weight, 20 parts of talcum powder and 1 part of silane coupling agent are added to a high-speed mixing mixer, the speed is controlled at 1500 rpm, and the premix is ​​obtained by dispersing for 30 minutes;

[0035] (2) Add the premix obtained in step (1) and the foaming agent composed of sodium lauryl sulfate, ammonium oxide, and water mixed in a mass ratio of 1:5:4 into a rotary homogenizer, and rotate The speed of the homogenizer is controlled at 5000rpm, the temperature is 100°C, and the talc powder is peeled off step by step under the shearing action of the rotating blade to obtain the primary product of monolithic talc powder;

[0036] (3) The monolithic talc primary product obtained in step (2) is washed with water and acetone respectively and dried to obtain monolithic talc.

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Abstract

The invention relates to a method for preparing single-piece talc powder. The method comprises the following steps: (1) adding talc powder and a coupling agent to a high-speed mixing stirrer to obtaina premixed substance; (2) dispersing and mixing the premixed substance obtained in the step (1) and a foaming agent, and adding the mixed material into a rotary homogenizer, and stripping the talc powder step by step under the shearing action of rotating blades to obtain a primary product of the single-piece talc powder; and (3) separately washing the primary product of the single-piece talc powder obtained in the step (2) with water and acetone, and performing drying to obtain the single-piece talc powder. Compared with the prior art, the talc powder prepared by the method provided by the invention has high efficiency and low costs, can be widely used in a filler, and has broad market application prospects.

Description

technical field [0001] The invention relates to the field of inorganic non-metallic mineral materials, in particular to a method for preparing monolithic talc powder. Background technique [0002] Talc is a white, soft, hydrophobic mineral that belongs to the magnesium silicate structure containing crystal water. It consists of a three-layer structure: two silicon-containing layers sandwiching a magnesium oxide or magnesium hydroxide layer. Unlike other silicate layered minerals (such as china clay), the three-layer structure of talc crystals is in perfect electrical balance, making it inherently charged with little or no charge. The lack of charge makes talc a non-polar or hydrophobic mineral, which makes it better adsorbed on other hydrophobic substances such as stickies and resins, which is why talc is widely used as a resin and glue. The cause of sticky control agents. [0003] Talc powder is one of the most important inorganic chemical products today. Due to the adv...

Claims

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Application Information

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IPC IPC(8): C09C1/28C09C3/04C09C3/06C09C3/08C09C3/12C01B33/22
CPCC09C1/28C01B33/22C01P2004/20C09C3/003C09C3/006C09C3/04C09C3/06C09C3/08C09C3/12
Inventor 钟传新王君
Owner GUILIN HAOXIN TECH SERVICE
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