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Preparation method of special talc powder for coating pigment

A technology of talcum powder and pigments, which is applied in the field of pigment additives, can solve the problems of difficult wetting and dispersion of coatings, and achieve the effects of increasing specific surface area, reducing usage, and enhancing adsorption capacity

Inactive Publication Date: 2018-10-19
苗霞明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage is that due to its hydrophobicity, the coating made by talc powder is shear-swellable, and it is difficult to wet and disperse when preparing the coating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] In parts by weight, take 50 parts of talcum powder, 5 parts of phospholipids, and 80 parts of water successively, pour them into a beaker, stir and mix them with a glass rod for 20 minutes, then transfer the materials in the beaker to an autoclave, and then seal the autoclave. The temperature is 200°C, the pressure is 4MPa, and the rotation speed is 500r / min. After heating, pressurizing and stirring for 8 hours, the pressure is released to normal pressure, the autoclave is opened, the material is discharged, and filtered to obtain No. 1 filter cake, and the obtained 1 No. filter cake was washed 5 times with deionized water, and then the washed No. 1 filter cake was transferred to an oven, and dried to constant weight at a temperature of 110°C to obtain dry No. 1 filter cake, and then the obtained No. 1 filter cake was dried. The filter cake is moved into a tube furnace, roasted at 290°C for 5 hours, cooled to room temperature with the furnace, and discharged to obtain pr...

example 2

[0018]In parts by weight, take 50 parts of talcum powder and 80 parts of water in turn, pour them into a beaker, stir and mix them with a glass rod for 20 minutes, then transfer the materials in the beaker to an autoclave, then seal the autoclave, and put it at a temperature of 200°C , the pressure is 4MPa, and the rotation speed is 500r / min. After heating, pressurizing and stirring for 8 hours, the pressure is released to normal pressure, the autoclave is opened, the material is discharged, filtered, and the No. 1 filter cake is obtained, and the obtained No. 1 filter cake is used Wash with deionized water for 5 times, then transfer the washed No. 1 filter cake into an oven, and dry it to constant weight at a temperature of 110°C to obtain a dry No. 1 filter cake, and then transfer the obtained No. 1 filter cake into a tube In a type furnace, the temperature is 290 °C, roasting for 5 hours, cooling to room temperature with the furnace, and discharging the material to obtain pr...

example 3

[0020] In parts by weight, take 50 parts of talcum powder, 5 parts of phospholipid, and 80 parts of water in sequence, and add an inorganic strong acid solution with 0.4 times the mass of talcum powder, and then add zirconia ball milling beads according to the mass ratio of the ball to material at 30:1. The revolution speed is 300r / min, the rotation speed is 550r / min, the ball mill is mixed for 8 hours, the material is discharged, and the ball mill is obtained, and the obtained ball mill is filtered to obtain the No. 2 filter cake, and the obtained No. 2 filter cake is deionized Wash with water for 5 times, then transfer the washed filter cake to an oven, and dry it to a constant weight at a temperature of 110°C to obtain a dry No. 2 filter cake, which is ball-milled modified talcum powder; in parts by weight, Take 100 parts of ball-milled modified talc powder, 80 parts of polyvinylpyrrolidone, 300 parts of water, and 50 parts of ethyl orthosilicate in sequence. First, mix the ...

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Abstract

The invention discloses a preparation method of special talc powder for a coating pigment, and belongs to the technical field of pigment additives. The preparation method comprises the following steps: firstly heating, carrying out pressurization and stirring the talc powder, phospholipid and water, and then performing filtering, washing, drying and calcination to obtain pretreated talc powder; carrying out ball-milling and mixing the pretreated talc powder and an inorganic strong acid solution to obtain a ball abrasive, filtering the ball abrasive, and performing washing and drying to obtainball-mill modified talcum powder; and ultrasonically dispersing the ball-milled modified talc powder, polyvinylpyrrolidone and water to obtain dispersion liquid, dropwise adding tetraethyl orthosilicate to the dispersion liquid under stirring, after dropwise adding tetraethyl orthosilicate, continuously stirring, discharging, filtering, washing and drying to obtain coated modified talcum powder; calcining the obtained coated modified talc powder, cooling with a furnace, and discharging, thereby obtaining the special talcum powder for the coating pigment. The special talc powder for the coatingpigment prepared by the technical scheme of the invention has the characteristics of low viscosity and high wettability.

Description

technical field [0001] The invention discloses a preparation method of special talcum powder for coating pigments, which belongs to the technical field of pigment additives. Background technique [0002] Pigment coated paper is mainly composed of base paper and coating. The purpose of using coating is to fill and cover the uneven surface of base paper to achieve high opacity, high whiteness, high gloss, high smoothness, High printability and moderate ink absorption, etc., to obtain the best printing effect. The pigment accounts for 75%-90% in the paint, which is the key component, and its characteristics play a decisive role in the performance of the paint. Talc powder is rarely used as a coating pigment for papermaking. One of the reasons is that talc powder is difficult to disperse, so paper mills have always been cautious about its use. The reason why talcum powder is different from other coating pigments is mainly due to its special surface properties, that is, its sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/04C09C3/06D21H19/40
CPCC01P2006/12C01P2006/16C09C1/28C09C3/006C09C3/041C09C3/063D21H19/40
Inventor 苗霞明许玉吴庆梅
Owner 苗霞明
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