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Method for preparing flake talcum

A technology of talcum powder and monolithic, which is applied in the direction of chemical instruments and methods, magnesium silicate, silicate, etc., can solve the problems of small filling amount, flaky structure damage of talc powder, low efficiency, etc., and achieve low cost and wide Market application prospect, high efficiency effect

Inactive Publication Date: 2018-03-13
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 flake talcum

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) In parts by weight, 5 parts of talcum powder and 1 part of titanate coupling agent are added to a high-speed mixer, the speed of the high-speed mixer is controlled at 800 rpm, and the premix is ​​obtained by dispersing for 15 minutes;

[0030] (2) After mixing the premix obtained in step (1) with sodium bicarbonate, add talcum powder and sodium bicarbonate into the high-temperature and high-pressure reactor, control the temperature at 120°C, and control the pressure at 5Mpa for 5 minutes. Then quickly release the pressure of the high-temperature autoclave, repeat the above operation 3 times, and then add it to the multi-stage conical mixer. The powder is peeled off step by step to obtain the primary product of monolithic talc powder;

[0031] (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

[0033] (1) In parts by weight, 8 parts of talcum powder and 1 part of aluminate coupling agent were added to a high-speed mixer, the speed of the high-speed mixer was controlled at 1000 rpm, and the mixture was dispersed for 20 minutes to obtain a premix;

[0034] (2) After mixing the premix obtained in step (1) with calcium bicarbonate, add talcum powder and calcium bicarbonate into the high-temperature and high-pressure reactor, control the temperature at 200°C, and control the pressure at 8Mpa for 10 minutes. Then quickly release the pressure of the high-temperature autoclave, repeat the above operation 4 times, and then add it to the multi-stage conical mixer. The powder is peeled off step by step to obtain the primary product of monolithic talc powder;

[0035] (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

[0037] (1) In parts by weight, 10 parts of talcum powder and 1 part of silane coupling agent are added to a high-speed mixer, the speed of the high-speed mixer is controlled at 1200 rpm, and the mixture is dispersed for 30 minutes to obtain a premix;

[0038] (2) After mixing the premix obtained in step (1) with potassium hydrogen tartrate, add talcum powder and potassium hydrogen tartrate into the high-temperature and high-pressure reactor, control the temperature at 250°C, and control the pressure at 10Mpa for 20 minutes. Then quickly release the pressure of the high-temperature autoclave, repeat the above operation 5 times, and then add it to the multi-stage conical mixer. The powder is peeled off step by step to obtain the primary product of monolithic talc powder;

[0039] (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 flake talcum. The method includes the steps of firstly, adding talcum powder and a coupling agent into a high-speed mixing agitator to obtain a premix;secondly, mixing the premix obtained in the first step with a swelling agent to obtain a mixture, subjecting the mixture to swelling treatment, adding the mixture in a multistage conical mixer to peeloff the talcum gradually under the shear effect to further obtain a flake talcum primary product; thirdly, washing the flake talcum primary product with water and acetone respectively, and then drying to obtain the flake talcum. Compared with the prior art, the method for preparing flake talcum has high efficiency and needs low cost, and the flake talcum is applied to fillers extensively and haswide application prospect in market.

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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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/04C09C3/12C01B33/22
CPCC09C1/28C01B33/22C01P2004/20C09C3/006C09C3/04C09C3/12
Inventor 钟传新王君
Owner GUILIN HAOXIN TECH SERVICE