Anatase titanium dioxide type titanium white pulp and preparation thereof

An anatase-type titanium dioxide and anatase-type technology, applied in chemical instruments and methods, pigment slurry, inorganic pigment treatment, etc., can solve the problems of high viscosity of dispersion slurry, poor dispersion, and stable dispersion of pigments, etc., to achieve Wide range of raw material sources, low raw material cost, obvious social and economic benefits

Inactive Publication Date: 2008-10-08
SHENZHEN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For a long time, due to the poor dispersibility of anatase titanium dioxide in water, the mass percentage of pigment in its water-dispersed pigment slurry is often less than 60%. When the mass percentage of pigment is higher than 60%, the viscosity of the dispersion slurry is too high, and the pigment cannot be obtained. good stable dispersion

Method used

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  • Anatase titanium dioxide type titanium white pulp and preparation thereof

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specific Embodiment approach 1

[0028] The preparation method of the anatase titanium dioxide slurry provided in this specific embodiment intends to prepare the anatase titanium dioxide slurry with a pigment mass percentage between 65% and 70% and a low viscosity.

[0029] The production formula of the anatase type titanium white slurry prepared by the present invention is as follows:

[0030]

[0031] The polyacrylate salt dispersant mentioned in the formula of the present invention is sodium polyacrylate used in this specific method, and the mass percentage of its active ingredient is 38-43%, which is a kind of high-efficiency and low-cost pigment and filler dispersant It has a good dispersion and stabilization effect on pigments and fillers of water-based paints.

[0032] The anatase titanium dioxide in the formula of the present invention is non-surface-treated, the anatase titanium dioxide used for coatings, and its technical index meets the GB / T 1706-2006 standard.

[0033] The inorganic salt dispe...

specific Embodiment approach 2

[0041] This specific embodiment is basically the same as the steps included in the formula and preparation method of specific embodiment 1, the difference is:

[0042] In the step of preparation before dispersion in this specific embodiment, the added sodium polyacrylate is 1 kg, the defoamer is 0.05 kg, and the water is 24.7 kg. The inorganic salt dispersion regulator that adds in the low-speed dispersion step is 5 kilograms, comprises the calcium silicate powder of 3 kilograms and the magnesium carbonate powder of 2 kilograms. The added anatase type titanium dioxide is 70 kg. The low speed dispersion time was 15 minutes. The amount of defoamer added in subsequent processing steps was 0.25 kg.

specific Embodiment approach 3

[0043] This specific embodiment is basically the same as the steps included in the formula and preparation method of specific embodiment 1, the difference is:

[0044] In the step of preparation before dispersion in this specific embodiment, the added sodium polyacrylate is 2 kg, the defoamer is 0.2 kg, and the water is 28.7 kg. The inorganic salt dispersion regulator that adds in the low-speed dispersion step is 4 kilograms, comprises the calcium carbonate powder of 1 kilogram and the magnesium silicate powder of 3 kilograms. The added anatase type titanium dioxide is 65 kilograms. The low speed dispersion time was 10 minutes. The amount of defoamer added in subsequent processing steps was 0.1 kg.

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Abstract

The invention relates to anatase-type titanium dioxide slurry, comprising the following components based on weight percentage: 65 to 70% of anatase-type titanium dioxide powder, 1 to 2% of dispersant, 0.1 to 0.3% of defoamer, 22.7 to 33.9% of water, and inorganic salt disperse regulator. The invention also relates to the preparation method of the anatase-type titanium dioxide slurry, comprising the following steps: the preparation before dispersion, namely, the dispersant, the defoamer and the water are added to a mixing tank and stirred at a low speed; low-speed dispersion, namely, during the process of low-speed stirring, inorganic salt disperse regulator is slowly added to the mixing tank, followed by anatase-type titanium dioxide powder after even stirring; high-speed dispersion, sanding and follow-up processing steps. As inorganic salt disperse regulator is added in the invention, under the condition of not changing the production technology of the traditional titanium dioxide powder and based on the original technology and equipment, the method of the invention can produce low-viscosity anatase-type water dispersible slurry with the content of titanium pigment up to 65-70%, with obvious social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to an anatase-type titanium dioxide slurry used for coatings and a preparation method thereof. Background technique [0002] Anatase titanium dioxide slurry is a water-dispersed system of anatase titanium dioxide, which can be used not only as a color matching raw material for water-based latex paint (ie latex paint), but also as a raw material for preparing water-based latex paint. Water-based latex coatings have been widely used in interior and exterior wall decoration of buildings because of their environmental protection, low cost and performance not inferior to solvent-based coatings. In order for water-based latex paint to have good hiding power, a certain amount of titanium dioxide must be added to the formula. At present, titanium dioxide mainly includes two categories: anatase titanium dioxide and rutile titanium dioxide. Among them, rutile titanium dioxide has e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/00C09D17/00
Inventor 徐玲吕智文
Owner SHENZHEN POLYTECHNIC
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