The chemical name of titanium dioxide isTitanium dioxide (TiO₂）It is the highest-performing white pigment in industry, offering strong opacity and high whiteness thanks to its extremely high refractive index, and is widely used in coatings, plastics, synthetic fibers, electronics, inks, and other industries.

1.Sulfuric acid process: Can produce rutile and anatase; raw materials are readily available, and costs are moderate; applicationsfieldwide;Rutile-type productHigh-end grades, through optimized coating, can also achieve weathering and heat resistance comparable to those of high-end chlorination-process grades.

2.Chlorination method: Produces only rutile; high purity, few impurities, and uniform particle size; most mainstream high-end grades from overseas companies such as Chemours and Tronox are manufactured using the chloride process, primarily for premium applications like automotive coatings, high-end plastics, and electronics; requires substantial capital investment,The price is higher.

Key reminder:A good performance does not necessarily result from the chlorination process; the final performance depends on the surface coating treatment. If the sulfuric acid process is properly coated and modified, some of its indicators can be comparable. Chlorination-grade grade.

Native titanium dioxide exhibits strong photocatalytic activity, and ultraviolet irradiation can oxidize the surrounding resin/coating matrix. This is achieved by precipitating on the particle surface.Inorganic oxides such as silicon, aluminum, and zirconium (inorganic coating), with some additionally coated with an organic layer:

Inorganic coating:Enhances weather resistance, anti-chalking properties, and heat resistance, while blocking photocatalytic reactions.; The core of high weather-resistant products is a dense, thick silica coating.（ High-end grade R960, CR828 All use thick silicon / siliconZirconium cladding).

Organic coating: improves wetting and dispersion in plastic and solvent systems, reducing agglomeration and pinholing.

Also a rutile titanium dioxide,The difference in weather resistance lies mainly not in the purity of titanium dioxide, but in the coating process..

1.Opacity: The ability of scattered light to mask the underlying background color is directly related to particle size and refractive index.

2.Weather resistance: UV resistance, anti-chalking, and retention of gloss and color; common tests include xenon arc aging and QUV accelerated weathering, assessing ΔE (color difference), gloss retention, and chalking rating.

3.Dispersion: The ease with which a powder can be dispersed in resin or slurry; poor dispersion leads to pinholes, flow marks, spinneret clogging, and white spots.

4.Thermal stability: The ability to resist yellowing under high-temperature processing, a core metric in plastic extrusion and injection molding applications.

5.Impurities (iron, free chlorine, heavy metals): Iron elevation causes yellowing; free chlorine affects flame retardancy; heavy metals relate to export compliance with RoHS and REACH.