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Method for preparing single-piece talcum powder

A talcum powder, monolithic technology, applied in the direction of magnesium silicate, silicate, etc., can solve the problems of low preparation efficiency of talc powder, inability to be widely used in the field of fillers, etc., and achieve significant market application value, high added value, and reduced production. cost effect

Active Publication Date: 2017-06-13
桂林龙胜正大粉体科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the low production efficiency of the current talc powder, the structural defects caused by the preparation of the monolithic talcum powder, and the inability to be widely used in the field of fillers. The present invention provides a method for preparing monolithic talcum powder. Cutting and stretching to prepare monolithic talc powder, specifically, the talc powder is pretreated with an expansion agent to increase the distance between the talc powder layers, so that the foaming agent can penetrate into the interlayer of the talc powder, Make the talcum powder layer slide relative to each other, and then use the multi-stage disc mixer to shear and peel off the talc powder layer and layer to form a talcum powder with a single-layer sheet structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Add 80 parts by weight of talc powder, 1 part by weight of silane coupling agent, and 0.5 parts by weight of active agent zincate into a high-speed mixer, and mix and disperse for 10 minutes at a speed of 600 rpm to obtain a premix;

[0026] 2) Add the premix obtained in step 1), 2 parts by weight of expansion agent polyethylene glycol, and 1 part by weight of blowing agent p-benzenesulfonyl hydrazide into a closed disperser, and the temperature of the disperser is controlled at 60°C to Disperse and mix at a speed of 1000rpm, turn on the vacuum negative pressure at the same time, and disperse for 20 minutes, so that the expansion agent and foaming agent are evenly dispersed in the layered structure of talcum powder to obtain an intercalation premix;

[0027] 3) Add the intercalation premix obtained in step 2) into the multi-stage disc mixer, set the speed of the multi-stage disc mixer to 600rpm, and the temperature to 120°C. The expansion agent and the foaming agent c...

Embodiment 2

[0031] 1) Add 90 parts by weight of talcum powder, 2 parts by weight of coupling agent stearate, and 0.5 parts by weight of active agent phosphate into a high-speed mixer, and mix and disperse for 5 minutes at a speed of 1200 rpm to obtain a premix;

[0032] 2) Add the premix obtained in step 1), 1 part by weight of the expansion agent sodium alginate, and 1 part by weight of the foaming agent bisbenzenesulfonyl hydrazide into the closed dispersion mixer. Disperse and mix at high speed, and at the same time turn on the vacuum negative pressure, disperse for 20 minutes, so that the expansion agent and foaming agent are evenly dispersed in the layered structure of talcum powder, and the intercalation premix is ​​obtained;

[0033] 3) Add the intercalation premix obtained in step 2) into a multi-stage disc mixer. The multi-stage disc mixer is equipped with 2 pairs of alternate disc-type shearing elements and 2 pairs of toothed disc-type dispersing elements. , set the speed of the...

Embodiment 3

[0037]1) Add 85 parts by weight of talc powder, 1 part by weight of silane coupling agent, and 0.5 parts by weight of active agent aluminate into a high-speed mixing mixer, and mix and disperse at a speed of 600 rpm for 10 minutes to obtain a premix;

[0038] 2) Add the premix obtained in step 1), 5 parts by weight of the expansion agent β-cyclodextrin, and 2 parts by weight of the foaming agent p-toluenesulfonyl hydrazide into the closed dispersion mixer, and the temperature of the dispersion mixer is controlled at 90 ℃, disperse and mix at a speed of 800rpm, and at the same time turn on the vacuum negative pressure, disperse for 15 minutes, so that the expansion agent and foaming agent are evenly dispersed in the layered structure of talcum powder, and the intercalation premix is ​​obtained;

[0039] 3) Add the intercalation premix obtained in step 2) into a multi-stage disc mixer, which includes 3 pairs of disc-type shearing elements and 4 pairs of toothed disc-type dispersi...

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Abstract

The invention provides a method for preparing single-piece talcum powder. The method for preparing the single-piece talcum powder by collaborative foaming expansion shear tensile specifically comprises the following steps: firstly, preprocessing the talcum powder by a swelling agent to increase an interval between talcum powder layers so as to enable a foaming agent to be dipped between the talcum powder layers, and enabling the talcum powder layers to relatively slide; utilizing a multistage millstone type mixing mill for shearing and peeling to enable the talcum powder layers to be peeled, and forming the talcum powder of a single-layer laminated structure. The talcum powder prepared with the method is the single-layer laminated talcum powder and has the advantages of high preparation efficiency and high additional value, and the layer structure of the talcum powder is not damaged. The talcum powder is used for composite materials, has a high enhancement function, has transparency, can be widely added into products including plastics, high-class coatings and the like, is suitable for scale production and has an obvious market application value.

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 with a magnesium silicate structure containing water of crystallization. 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 advan...

Claims

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Application Information

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IPC IPC(8): C01B33/22C08K7/00C08K3/34
CPCC01B33/22C01P2006/12C01P2006/90C08K3/34C08K7/00C08K2201/006
Inventor 陈庆曾军堂陈兵
Owner 桂林龙胜正大粉体科技有限公司
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