Titanium White Used In Coatings

Titanium White Used In Coatings

Among the pigments, white pigment is the most versatile.
Titanium white has become the best white pigment indispensable in the production of paint. The amount of titanium white accounts for more than 90% of the total pigments used in coatings.
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Titanium dioxide (TiO2) 

scientific name titanium dioxide, is a white powder, slightly yellowish when heated, and is a white pigment whose main component is titanium dioxide (TiO2). Its molecular formula is TiO2, which is a polycrystalline compound. Its particles are regularly arranged and have a lattice structure. . Titanium dioxide has the smallest relative density. In the entire titanium industry, rutile and ilmenite consumed in the production of titanium dioxide account for 90% of the total consumption, and only 10% of the titanium-containing materials consumed in the production of metallic titanium (sponge titanium).

Titanium Dioxide used in Coatings

Titanium dioxide in the role of inks irreplaceable, this is because titanium dioxide in determining the ink quality of several major performance far better than other white pigment. Such as refractive index, bleaching force, hiding power and oil absorption.

Under the same conditions, the refractive index ofChinarutile titanium dioxide is 2.76, anatase titanium dioxide is 2.55, zinc sulfide is 2.37, zinc barium white refractive index is 1.84, lead white refractive index is 2.00. In terms of achromatic force, titanium dioxide also showed better performance than other white pigments.

The relative value of the bleaching force of rutile type titanium dioxide is 100, that of anatase type titanium dioxide is 77, that of zinc sulfide is 40, that of zinc barium white is 16, and that of lead white is 9. In terms of hiding power, titanium dioxide has an advantage over other white pigments.

The relative value of covering power of rutile type titanium dioxide was 100, anatase type titanium dioxide was 78, the relative value of covering power of zinc sulfide was 39, the relative value of zinc-barium white covering power was 18, and the relative value of lead white folding covering power was 12.

From the oil absorption per 100 grams of white pigment, rutile titanium dioxide oil absorption is 25 grams, anatase titanium dioxide oil absorption is 30 grams, zinc sulfide oil absorption is 15-25 grams, zinc barium white oil absorption is 14-16 grams, lead white oil absorption is 8-15 grams, so titanium dioxide oil absorption is the best.

In ink finished products, refractive index, bleaching power, hiding power and oil absorption these four key properties support the quality of the ink, while titanium dioxide has other white pigment difficult to achieve refractive index, bleaching power, hiding power and oil absorption, so titanium dioxide as an ink additive is more suitable than other white pigment.


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