Preparation method of inorganic composite white pigment with high covering power

An inorganic composite and white pigment technology, which is applied in the direction of inorganic pigment treatment, chemical instruments and methods, fibrous fillers, etc., can solve the problems of production cost and environmental protection, high production cost, and large water consumption, etc., and achieve the relief of titanium dioxide The effect of tight supply of production raw materials, reduction of environmental protection pressure, and simple preparation process

Inactive Publication Date: 2010-07-14
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical precipitation coating method using titanium tetrachloride or titanyl sulfate as the coating raw material has high production costs, large water consumption, and produces a large amount of waste water, which has no advantages in terms of production costs and environmental protection.
Therefore, there is currently no inorganic pigment or composite inorganic pigment that can reach the index of titanium dioxide in terms of performance, especially in terms of hiding power.

Method used

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  • Preparation method of inorganic composite white pigment with high covering power

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Take 1000g of rutile titanium dioxide, add 1800ml of water, and 4g of sodium polyacrylate (ACUMER9400) as a dispersant, after dispersion and slurry adjustment, put it into a laboratory sand mill for circular grinding; at the same time, take 1000g of calcined kaolin and add 1000ml of water , dispersant sodium polycarboxylate (ACUMER 9460) 5g, stir and disperse to configure calcined kaolin slurry; when titanium dioxide is ground to the median particle size D 50 About 0.5μm, negative cumulative particle size D 97 After ≤2μm, add the prepared calcined kaolin slurry to the titanium dioxide slurry, and at the same time add glacial acetic acid to adjust the pH of the mixed slurry of titanium dioxide and calcined kaolin to 5, and then perform ultrafine grinding; mix titanium dioxide and white mineral powder The average particle size or median particle size D of the composite powder 50 Grinding to about 0.5μm, negative cumulative particle size D 97 After <3 μm, fil...

Embodiment 2

[0017] Example 2: Take 1000g of rutile titanium dioxide, add 1800ml of water, and 4g of sodium polyacrylate (ACUMER9400) as a dispersant. After dispersion and slurry preparation, put it into a laboratory sand mill for circular grinding; at the same time, take natural talc and calcite composite ore Powder 1000g, add water 800ml, dispersant sodium polycarboxylate (ACUMER 9460) 4g, stir and disperse to configure natural talc and calcite composite mineral powder slurry; when titanium dioxide is ground to the median particle size D 50 About 0.5μm, negative cumulative particle size D 97 After ≤2μm, add the prepared natural talc and calcite composite mineral powder slurry to the titanium dioxide slurry, and add glacial acetic acid to adjust the pH of the mixed slurry of titanium dioxide, natural talc and calcite composite mineral powder to 6.5, and then carry out ultra- Fine grinding; the average particle size or median particle size of the composite powder of titanium dioxide, natur...

Embodiment 3

[0018] Example 3: Take 1000g of rutile titanium dioxide, add 1800ml of water, 4g of sodium polyacrylate (ACUMER9400) as a dispersant, after dispersion and slurry adjustment, put it into a laboratory sand mill for circular grinding; simultaneously take 1000g of natural saponite mineral powder , add water 900ml, dispersant sodium polycarboxylate (ACUMER 9460) 5g, stir and disperse to configure saponite mineral powder slurry; when titanium dioxide is ground to the median particle size D 50 About 0.5μm, negative cumulative particle size D 97 After ≤2μm, add the prepared saponite mineral powder slurry to the titanium dioxide slurry, add glacial acetic acid at the same time to adjust the pH of the mixed slurry of titanium dioxide and saponite mineral powder to 4.5, and then carry out ultrafine grinding; the titanium dioxide Average particle size or median particle size D of composite powder with saponite mineral powder 50 Grinding to about 0.5μm, negative cumulative particle size ...

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Abstract

The invention relates to a preparation method of an inorganic composite white pigment with high covering power. The method comprises the steps of: taking titanium white powder and white mineral powder or composite white mineral powder as raw materials; taking a wet ultrafine stirring grinder or a sand miller as a compound device; performing segmented wet ultrafine grinding and compounding to the titanium white powder and the white mineral powder by adding a certain quantity of pH adjusting agent and dispersing agent; and drying and mechanically dispersing and depolymerizing size after ultrafine grinding and compounding to prepare the inorganic composite white pigment which can be used by replacing the titanium white powder, wherein the performance indexes such as the granularity, the whiteness and the covering power, and the like, of the inorganic composite white pigment are as the same as or similar with the granularity, the whiteness and the covering power of the titanium white powder. The method has simple preparation technology, lower preparation cost and cleaning preparation process.

Description

Technical field: [0001] The invention relates to a preparation method of an inorganic composite white pigment with high hiding power and high whiteness, belonging to the field of material science and engineering or the field of inorganic chemical industry. Background technique: [0002] Inorganic pigments have good high temperature resistance, chemical stability, weather resistance, etc., and are one of the important functional pigments. Titanium dioxide in inorganic pigments (the main component is TiO 2 ), especially rutile titanium dioxide, which has high hiding power and whiteness, good chemical stability and weather resistance, and is widely used in coatings, inks, plastics, leather, fabrics, cosmetics and other fields. Broad range of high performance white inorganic pigments. With the development of related industries, the market demand for titanium dioxide is increasing year by year. However, the production process of titanium dioxide is relatively complicated. Whet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/04C09C3/06
Inventor 郑水林张晓波黄朋刘杰
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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