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Preparation method for white mineral-titanium dioxide composite powder pigment

A white mineral and titanium dioxide technology, applied in chemical instruments and methods, inorganic pigment treatment, dyeing low molecular organic compound treatment, etc., can solve the problems of poor compatibility between composite powder and organic matrix, high energy consumption, etc., and achieve solid-liquid separation Easy, low energy consumption, simple preparation process

Inactive Publication Date: 2014-10-15
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a preparation method of white mineral-titanium dioxide composite powder pigment, which solves the problems of high energy consumption and poor compatibility between the prepared composite powder and the organic matrix in the existing preparation method

Method used

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  • Preparation method for white mineral-titanium dioxide composite powder pigment
  • Preparation method for white mineral-titanium dioxide composite powder pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Selection of raw materials:

[0028] Calcite is a white mineral powder, its particle size is less than 2μm, its content is 85%, and its median diameter is d 50 1.0μm; use anatase titanium dioxide as pigment grade titanium dioxide; use sodium stearate as organic modifier.

[0029] 2. Raw material ratio and preparation process steps:

[0030] (1) According to the mass ratio, measure 40% of calcite powder and 60% of water and place them in a heatable mixer, mix and stir for 60 minutes, then heat the slurry to 60°C to keep it stable;

[0031] (2) Adding a concentration of 6% sodium stearate solution to the heated calcite powder and water suspension, wherein the amount of sodium stearate in the solution is 1% of the calcite powder quality, stirred for 40min, and modified The activation index of the product reaches 99%, and the wet contact angle with water is 112°;

[0032] (3) According to the mass ratio, measure 40% of anatase-type titanium dioxide and 60% of water an...

Embodiment 2

[0038] 1. Selection of raw materials:

[0039] Calcite is a white mineral powder, its particle size is less than 2μm, its content is 85%, and its median diameter is d 50 1.0μm; use rutile titanium dioxide as pigment grade titanium dioxide; use sodium stearate as organic modifier.

[0040] 2. Raw material ratio and preparation process steps:

[0041] (1) According to the mass ratio, measure 40% of calcite powder and 60% of water and place them in a heatable mixer, mix and stir for 60 minutes, then heat the slurry to 60°C to keep it stable;

[0042] (2) Adding a concentration of 7% sodium stearate solution to the heated calcite powder and water suspension, wherein the amount of sodium stearate in the solution is 1% of the calcite powder quality, stirred for 40min, and modified The activation index of the product reaches 99%, and the wet contact angle with water is 112°;

[0043] (3) According to the mass ratio, measure 40% of rutile titanium dioxide and 60% of water and place...

Embodiment 3

[0049] 1. Selection of raw materials:

[0050] Taking barite as white mineral powder, its particle size is less than 2μm, its content is 88%, and its median diameter is d 50 1.0μm; use anatase titanium dioxide as pigment grade titanium dioxide; use sodium oleate as organic modifier.

[0051] 2. Raw material ratio and preparation process steps:

[0052] (1) According to the mass ratio, measure 40% of barite powder and 60% of water and place them in a heatable mixer, mix and stir for 60 minutes, then heat the slurry to 60°C to keep it stable;

[0053] (2) Adding a concentration of 7% sodium oleate solution to the heated barite powder and water suspension, wherein the amount of sodium oleate in the solution is 1% of the barite powder quality, stirred for 40min, The activation index of the modified product reaches 95%, and the wet contact angle with water is 108°;

[0054] (3) According to the mass ratio, measure 40% of anatase-type titanium dioxide and 60% of water, place them...

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Abstract

The invention discloses a preparation method for a white mineral-titanium dioxide composite powder pigment. The white mineral-titanium dioxide composite powder pigment is prepared by firstly preparing slurries respectively from a white mineral powder and pigment-grade titanium dioxide with water, employing an organic modifier to perform surface modification, regulating the pH value, then uniformly mixing the prepared slurries, and performing strong stirring, press filtering and drying. The preparation method comprises the following advantages that 1) energy consumption is relatively low in the preparation process; 2) the surface of the prepared composite particle has hydrophobicity, and the particle is good in compatibility with organic matrix; 3) the preparation technology is simple, especially solid-liquid separation is easy to realize, and large-scale production is easy to realize; and 4) the production process is clean, no three wastes (waste gas, waste water and industrial residue) are discharged, and environment is not polluted.

Description

technical field [0001] The invention relates to the technical field of powder material production, in particular to a preparation method of white mineral-titanium dioxide composite powder pigment. Background technique [0002] The pigment-grade titanium dioxide related to the present invention, that is, titanium dioxide, is composed of crystalline phase titanium dioxide with a particle size of 0.2-0.3 μm. For more than 100 years since its birth in the early 20th century, pigment grade titanium dioxide has been widely used in many industrial fields such as coatings, plastics, papermaking and inks, and has become a white pigment with the best performance, the widest application range and the absolute advantage in dosage. The world's annual output of pigment grade titanium dioxide reached 5.5 million tons in 2009, and my country has become the world's largest producer and consumer, with an annual output of 1,811,900 tons in 2011. At present, the proportion of titanium dioxide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/06C09C3/08
Inventor 丁浩周红侯喜锋于守仁
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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