Preparation method for inorganic composite white pigment capable of replacing titanium dioxide at high proportion

A technology of titanium dioxide and white pigments, which is applied in the treatment of inorganic pigments, chemical instruments and methods, and the treatment of dyed polymer organic compounds. It can solve the problems of incomplete coating of titanium dioxide and low substitution ratio of titanium dioxide in composite products, and achieve easy scale realization. The effect of production, tight cladding, and large light-scattering area

Inactive Publication Date: 2014-10-29
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a preparation method of an inorganic composite white pigment that can replace titanium dioxide in a high proportion, and solve the problems of incomplete coating of titanium dioxide and low replacement ratio of composite product titanium dioxide in the existing preparation method

Method used

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  • Preparation method for inorganic composite white pigment capable of replacing titanium dioxide at high proportion
  • Preparation method for inorganic composite white pigment capable of replacing titanium dioxide at high proportion

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Selection of raw materials:

[0023] Calcite is used as inorganic white powder with a particle size of less than 45 μm; anatase titanium dioxide is used as pigment grade titanium dioxide; sodium polyacrylate solution with a concentration of 25% is used as surfactant; dilute sulfuric acid is used as pH regulator;

[0024] 2. Raw material ratio and preparation process steps:

[0025] (1) Measure calcite powder, water and sodium polyacrylate solution, wherein the solid content of calcite powder is 70%, and the sodium polyacrylate content accounts for 0.44% of the calcite powder amount, mix the above-mentioned calcite powder with water, and then add Sodium polyacrylate was stirred at high speed for 60 minutes to form a suspension, and then wet-grinded with a vertical stirring mill, so that the particle size of the ground product was less than 2 μm and the content was 80%, and the median diameter was d 50 1.35μm;

[0026](2) Measure anatase type titanium dioxide, water ...

Embodiment 2

[0031] 1. Selection of raw materials:

[0032] Calcite is used as inorganic white powder with a particle size of less than 45 μm; rutile titanium dioxide is used as pigment grade titanium dioxide; sodium polyacrylate solution with a concentration of 25% is used as surfactant; dilute sulfuric acid is used as pH regulator;

[0033] 2. Raw material ratio and preparation process steps:

[0034] (1) Measure calcite powder, water and sodium polyacrylate solution, wherein the solid content of calcite powder is 70%, and the sodium polyacrylate content accounts for 0.44% of the calcite powder amount, mix the above-mentioned calcite powder with water, and then add Sodium polyacrylate was stirred at high speed for 60 minutes to form a suspension, and then wet-grinded with a vertical stirring mill, so that the particle size of the ground product reached 80% of the content of less than 2 μm, and the median diameter d 50 1.35μm;

[0035] (2) Measure rutile type titanium dioxide, water and...

Embodiment 3

[0040] 1. Selection of raw materials:

[0041] White carbon black is used as inorganic white powder with a particle size of less than 45 μm; anatase titanium dioxide is used as pigment grade titanium dioxide; sodium sodium silicate solution with a concentration of 15% is used as surfactant; dilute sulfuric acid is used as pH adjustment agent;

[0042] 2. Raw material ratio and preparation process steps:

[0043] (1) Measure white carbon black powder, water and sodium silicate solution, wherein the solid content of white carbon black powder is 40%, and sodium silicate content accounts for 0.44% of the amount of white carbon black powder, the above white carbon black Mix the powder with water, then add sodium silicate and stir at high speed for 60 minutes to form a suspension, then use a vertical stirring mill for wet grinding, so that the particle size of the ground product is less than 2 μm, the content is 80%, and the median diameter is d 50 1.35μm;

[0044] (2) Measure an...

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Abstract

The invention provides a preparation method for an inorganic composite white pigment capable of replacing titanium dioxide at a high proportion. The method employs calcite, barite or white carbon black as an inorganic white powder with the granularity less than 45 mu m, employs rutile type titanium dioxide or anatase type titanium dioxide as pigment-grade titanium dioxide, employs sodium polyacrylate with the concentration of 25% or a sodium silicate solution with the concentration of 15% as a surfactant, and employs diluted sulfuric acid as a pH regulator. The inorganic composite white pigment capable of replacing titanium dioxide at a high proportion is prepared by respectively pulping the white mineral powder and the pigment-grade titanium dioxide with water, employing an organic modifier to perform surface modification, regulating pH value, then uniformly mixing the prepared pulps, and performing intense agitation, press filtering and drying processing. Specifically, in the compositions, the inorganic white powder accounts for 55%-76% by weight and the pigment-grade titanium dioxide accounts for 24%-45%.

Description

technical field [0001] The invention relates to the technical field of production of a white powder pigment, in particular to a preparation method of an inorganic composite white pigment that replaces titanium dioxide in a high proportion. Background technique [0002] Pigment grade titanium dioxide, namely titanium dioxide, is a submicron powder material composed of crystalline phase titanium dioxide particles with a particle size of 0.2-0.3 μm. Since the birth of the titanium dioxide industry in the early 20th century, it has been widely used in many industrial fields such as coatings, plastics, papermaking and inks. pigment. The world's output of pigment grade titanium dioxide reached 5.5 million tons in 2009. As the world's largest production and consumption country, my country's output in 2011 reached 1.8119 million tons. At present, titanium dioxide pigments account for more than 90% of white pigments, and have become one of the important fine chemical raw materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/04C09C3/06C09C3/10
Inventor 丁浩郑允星周红侯喜锋
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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