TiO2 complex ore powder and preparation method thereof

A composite mineral and powder technology, which is applied in the direction of chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of not obvious cost reduction, large oil absorption of powder, unsatisfactory effect, etc., and achieve powder The combination of components is reasonable, the preparation process is simple, and the effect of being easy to popularize and apply

Inactive Publication Date: 2007-09-26
HUBEI PUYUAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of a single mineral powder in this patent, its effect is not ideal
For example, if barite is used as the core-encapsulating matrix, due to the high density of barite, it is easy to settle in the coating; while the core-encapsulating matrix using wollastonite alone has a high alkalinity; if calcined kaolin is used as the compound The cost reduction of pigments is not obvious, and the formed powder has a large oil absorption; although calcium carbonate is low in cost, high in whiteness, and moderate in density, its acid resistance is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] First mix 2400g of heavy calcium carbonate with a particle size of less than 325 mesh, 600g of calcined kaolin (or washed kaolin), and 600g of barite, then add about 1100g of water and 12g of polyacrylate dispersant, and stir well. Then use the peeling machine to peel and grind the flakes to an average particle size of 6-8 μm or less, add 100g of water glass, continue grinding to 4-6 μm, and adjust the pH value of the slurry to below 10 with 5% dilute sulfuric acid solution to make a composite white super The fine mineral powder core matrix slurry is ready for use. Anatase TiO 2 2400g, add about 1100g of water, 12g of polyacrylate dispersant, 50g of water glass, and fully disperse into TiO 2 slurry. Mix the two slurries evenly, then use the peeling machine to peel and grind the flakes to an average particle size of less than 2 μm, and then dry and pulverize them to form composite powder pigments. The performance of the composite powder pigment is shown in the attach...

Embodiment 2

[0014] Mix 2100g of heavy calcium carbonate with a particle size of less than 325 mesh, 900g of calcined kaolin (or washed kaolin), and 600g of barite, add about 1100g of water, 12g of organic titanate coupling agent, and stir well. Then use the peeling machine to peel and grind the flakes to an average particle size of 5-7 μm or less, add 120 g of silica sol, and continue grinding to 3-5 μm to make a composite white ultrafine mineral powder core matrix slurry for future use. Rutile TiO 2 2400g, add about 1000g of water, 10g of organic titanate coupling agent, 60g of silica sol, and fully disperse into TiO 2 slurry. Mix the two slurries evenly, then use the peeling machine to peel and grind the flakes to an average particle size of less than 2 μm, and then dry and pulverize them to form composite powder pigments. The performance of the composite powder pigment is shown in the attached table.

Embodiment 3

[0016] Mix 3000g of heavy calcium carbonate with a particle size of less than 325 mesh, 900g of calcined kaolin, and 600g of barite, add about 1500g of water, 20g of organic titanate coupling agent, and stir well. Then wet peeling and grinding to an average particle size of 6-8 μm by a peeling machine, adding 400g 50% TiOSO 4 Aqueous solution, continue to grind to 4-6μm, and make composite white ultrafine mineral powder core matrix slurry for future use. Anatase TiO 2 1500g, add about 600g of water, 10g of organic titanate coupling agent, and fully disperse into TiO 2 slurry. Mix the two slurries evenly, then use the peeling machine to peel and grind the flakes to an average particle size of less than 2 μm, and then dry and pulverize them to form composite powder pigments. The performance of the composite powder pigment is shown in the attached table.

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Abstract

The invention discloses a composite powder body with titanium oxide nature and preparing method in paint, plastic and paper making domain, which comprises the following steps: mixing 30-50% ultra-fine heavy calcium carbonate, 5-15% calcining porcelain clay or washing porcelain clay and 5-10% baritic rock; getting coated basal body; adding into organic surface modifier and water; producing slurry; grinding with wet method stripper; adding into inorganic surface modifier; grinding the material to suitable particle diameter; choosing 25-60% titanium dioxide as enveloped material; adding into organic and inorganic surface modifier and water; producing slurry; mixing the titanium dioxide slurry with composite powder body slurry; grinding the composite powder body slurry to demanded fineness with wet method stripper; cooling the slurry directly; disintegrating; getting the product.

Description

technical field [0001] The invention relates to a mineral powder and a preparation method thereof, in particular to a composite powder with titanium dioxide properties and a preparation method thereof used in the fields of paint, plastics, papermaking and the like. This powder is also called composite titanium dioxide powder. The powder of the invention is composed of heavy calcium carbonate, kaolin or barite powder as a core-coating matrix and titanium dioxide as a coating. Background technique [0002] Titanium dioxide is a white pigment widely used in coatings, plastics, papermaking and other fields. It has excellent heat resistance, weather resistance, chemical stability, easy dispersion, good whiteness and hiding power, and is an excellent white pigment. . However, due to the high price of titanium dioxide, especially in some of its applications such as coatings, plastics and other products, due to the pressure of product costs, people are looking for some substitutes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/06
Inventor 莫文权李海生郭金山刘鹏
Owner HUBEI PUYUAN CHEM
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