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Titanium dioxide barium sulfate coating method

A barium sulfate, titanium dioxide technology, applied in chemical instruments and methods, inorganic pigment treatment, dyeing and washing, etc., can solve the problems of reducing product performance and service life, paint loss of gloss, etc., to improve hiding power, reduce oil absorption, The effect of reducing waste by-products

Inactive Publication Date: 2021-10-26
SICHUAN LOMON TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since titanium dioxide, especially rutile titanium dioxide, has photocatalytic activity, titanium dioxide without surface treatment will catalyze and degrade the organic components in contact with it during use, which is the phenomenon of loss of gloss and powdering of the coating, which seriously reduces the various properties of the product. performance and service life

Method used

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  • Titanium dioxide barium sulfate coating method
  • Titanium dioxide barium sulfate coating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Take the abrasive from the workshop, adjust the concentration of the abrasive to 300g / L, adjust the pH to 10-10.5, and the temperature at 60°C; 2. Co-flow the coating with sodium metaaluminate and dilute sulfuric acid solution for 90 minutes, and aluminum clad The amount of film is 1wt%, and the co-flow coating is completed, and the aging is 90min; 3. Adjust the pH of the slurry to 6.8-7.2, and aging for 90min; 4. Slowly add barium chloride solution (concentration 100g / L), and the coating amount of barium sulfate is 0.5 % by weight, the addition time is 60 minutes, after the addition is complete, it is matured for 90 minutes; 5. Adjust the pH of the slurry to 6.8-7.2, and it is matured for 90 minutes. 6. After the coating is completed, sample 1 is obtained by washing, drying, and grinding, and is ready for use.

Embodiment 2

[0039] The difference from Example 1 is that the coating amount of barium sulfate is changed to 1 wt%, and sample 2 is obtained, which is ready for use.

Embodiment 3

[0041] The difference from Example 1 is that the coating amount of barium sulfate is changed to 2wt% to obtain sample 3, which is ready for use.

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Abstract

The invention belongs to the technical field of titanium dioxide production, and particularly discloses a titanium dioxide barium sulfate coating method. The method comprises the following steps: 1) performing inorganic coating on a titanium dioxide abrasive material to obtain a coating base material containing sulfate radicals; 2) adjusting the temperature and the pH value of the coating base material, slowly adding a barium salt solution, and curing after the barium salt solution is added; 3) adjusting the pH value of the cured material, and curing; and 4) washing, drying and grinding the material to obtain the barium sulfate coated titanium dioxide. According to the method, sulfate radicals in the titanium dioxide are utilized to form a barium sulfate coating film, so that the covering power, dispersity and other application performances of the titanium dioxide can be improved, and the oil absorption of the titanium dioxide can be reduced.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide production, and in particular relates to a method for coating titanium dioxide with barium sulfate. Background technique [0002] As an extender pigment, barium sulfate is widely used in coatings, which plays an important role in improving the thickness, abrasion resistance, water resistance, heat resistance, surface hardness and impact resistance of the coating film. The particle size of barium sulfate is close to that of the original particles of many pigments. In the pigment dispersion system, there is a certain steric effect on most of the pigment particles. On the one hand, it is beneficial to the uniform diffusion of pigment particles, and on the other hand, it can hinder the Particles collide and gather. As an important inorganic chemical material, barium sulfate has many superior properties such as easy development, low cost, low hardness and oil absorption value, non-toxicity, l...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/04C09C3/06
CPCC09C1/3615C09C1/3623C09C1/363C09C1/3661C09C3/006C09C3/003C09C3/041C09C3/043C09C3/063
Inventor 陈冲周春勇吴彭森和奔流肖刚
Owner SICHUAN LOMON TITANIUM IND CO LTD
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