Preparation method of high-reinforcing titanium dioxide for water-based coating

A technology of titanium dioxide and water-based coatings, applied in chemical instruments and methods, coatings, fibrous fillers, etc., can solve the problems of increasing the dispersion and compatibility of water-based coatings, poor weather resistance, easy cracking, etc., to improve water solubility, Good compatibility and enhanced binding effect

Active Publication Date: 2018-11-09
HEBEI MILSON TITANIUM DIOXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the defects of existing water-based paints such as easy to fall off, easy to crack, and poor weather resistance, the present invention provides a preparation method for high-reinforcement titanium dioxide for water-based paints. Add white fibrous inorganic mineral powder, and then add pore-forming agents urea and ammonium carbonate to further pore-forming treatment to produce porous fibrous loose titanium dioxide, which not only has a large specific surface area, but also has the ability to interact with the matrix material. Cross-linking to form a network, and then organic coating treatment, which increases its dispersion and compatibility in water-based paints and makes up for the defects of water-based paints

Method used

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  • Preparation method of high-reinforcing titanium dioxide for water-based coating
  • Preparation method of high-reinforcing titanium dioxide for water-based coating
  • Preparation method of high-reinforcing titanium dioxide for water-based coating

Examples

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Effect test

Embodiment 1

[0024] A kind of preparation that is used for the high reinforcement titanium dioxide of waterborne coating, its method step comprises:

[0025] A. Slurry preparation

[0026] Mix titanium dioxide and inorganic mineral powder in distilled water at a mass ratio of 30:1, then add a dispersant, the amount of dispersant added is 0.2% of the mass of titanium dioxide, and then stir at a speed of 200rpm for 10min to obtain a concentration of 300g / L Inorganic mineral powder and titanium dioxide mixed slurry; Wherein, the mass ratio of dispersant isopropanolamine and sodium silicate is 1:1;

[0027] B. Preparation of slurry

[0028] Add a pore-forming agent to the mixed slurry in step A, the addition amount is 8% of the mass of titanium dioxide, and then stir at a high speed of 2000rpm for 10min to obtain a slurry; wherein the pore-forming agent is urea and urea with a mass ratio of 1:1 ammonium carbonate;

[0029] C. Spray drying and pore making

[0030] The slurry prepared in ste...

Embodiment 2

[0034] A kind of preparation that is used for the high reinforcement titanium dioxide of waterborne coating, its method step comprises:

[0035] A. Slurry preparation

[0036] Mix titanium dioxide and inorganic mineral powder in distilled water at a mass ratio of 35:1, then add a dispersant in an amount of 0.3% of the mass of titanium dioxide, and then stir at a speed of 250rpm for 15min to obtain a concentration of 350g The mixed slurry of inorganic mineral powder and titanium dioxide in / L; Wherein, the mass ratio of dispersant isopropanolamine and sodium silicate is 1:2;

[0037] B. High speed stirring slurry

[0038] Add a pore-forming agent to the slurry in step A in an amount of 8% of the mass of titanium dioxide, and then stir at a high speed of 2000rpm for 10 minutes to obtain a slurry; wherein the pore-forming agent is urea and carbonic acid with a mass ratio of 1:2 Ammonium;

[0039] C. Spray drying and pore making

[0040] The slurry prepared in step B is used at ...

Embodiment 3

[0044] A kind of preparation that is used for the high reinforcement titanium dioxide of waterborne coating, its method step comprises:

[0045] A. Slurry preparation

[0046] Mix titanium dioxide and inorganic mineral powder in distilled water at a mass ratio of 40:1, then add a dispersant in an amount of 0.4% of the mass of titanium dioxide, and then stir at a speed of 300rpm for 20min to obtain a concentration of 400g The mixed slurry of inorganic mineral powder and titanium dioxide in / L; Wherein, dispersant is the isopropanolamine and sodium silicate that mass ratio is 1:1.5;

[0047] B. Preparation of slurry

[0048] Add the slurry in step A to a pore-forming agent in an amount of 8% of the mass of titanium dioxide, and then stir at a high speed of 2100 rpm for 15 minutes to obtain a mixed slurry; wherein the pore-forming agent is a pore-forming agent with a mass ratio of 1:1.5 Urea and ammonium carbonate;

[0049] C. Spray drying and pore making

[0050] The mixed s...

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Abstract

The invention relates to a preparation method of high-reinforcing titanium dioxide for a water-based coating, and belongs to the technical field of the preparation of titanium dioxide functional materials. The preparation method comprises the following steps: A) preparation of paste: mixing titanium dioxide and inorganic mineral powder in distilled water, adding a dispersant, stirring to prepare mixed paste of the inorganic mineral powder and titanium dioxide; B) preparation of slurry: adding a pore forming agent into the mixed paste of step A, and high-speed stirring to prepare the slurry; C)preparation of a pore-forming composite: performing spray drying on the slurry prepared in step B in a spray dryer to prepare a composite of pore-forming titanium dioxide and inorganic minerals; andD) preparation of high-reinforcing titanium dioxide: enabling the pore-forming composite prepared in step C to be subjected to airflow pulverization in an airflow pulverizer, and performing organic coating treatment during the airflow pulverization to prepare the high-reinforcing titanium dioxide. The high-reinforcing titanium dioxide prepared by the method is used in the water-based coating to improve the weather resistance, bonding strength, crack resistance, color change resistance and the like of a coating layer.

Description

technical field [0001] The invention belongs to the technical field of preparation of titanium dioxide functional materials, and in particular relates to a preparation method of high-strength titanium dioxide, which is used for water-based paints. The titanium dioxide prepared by the method of the present invention is loose and porous, has a relatively large specific surface area, and is applied to water-based coatings with high reinforcing performance, which not only improves the weather resistance of the coating, but also improves the bonding strength, cracking resistance, and corrosion resistance of the coating. Resistance to discoloration and other properties. Background technique [0002] Titanium dioxide has superior whiteness, tinting strength, hiding power, weather resistance, heat resistance and chemical stability, especially non-toxicity, is the best performance in the world and can be widely used in coatings, plastics, papermaking, printing Additives in ink, chem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/04C09C3/06C09C3/08C09D7/62C09D133/00
Inventor 张川张建平张千张潇
Owner HEBEI MILSON TITANIUM DIOXIDE
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