As we all know, coatings are users of titanium dioxide, especially Rutile titanium dioxide, which accounts for 58% -60% of the world's coating industry. The main reason is that titanium dioxide is far superior to other white pigments in all aspects of performance. Therefore, coatings using titanium dioxide as pigment are much higher than coatings using ordinary fillers. Because titanium dioxide is an indispensable part of coatings, its role is not just hiding power and decoration, More importantly, it is to improve the physical and chemical properties of the coating, enhance the mechanical strength, adhesion, corrosion resistance, and light and weather resistance of the coating film. Therefore, when producing coatings, it is necessary to reasonably select titanium dioxide varieties and specifications that are suitable for the performance requirements of the coatings.
Coatings have high weather resistance standards for titanium dioxide, especially for outdoor surface coatings that require high or ultra-high weather resistance. When using titanium dioxide with low weather resistance, the coating may experience problems such as fading, discoloration, pulverization, cracking, and peeling. The crystal structure of titanium dioxide is more compact than that of anatase titanium dioxide, and its photochemical activity is low, so its weather resistance is far higher than that of anatase titanium dioxide. Therefore, the titanium dioxide used for coating is basically Rutile titanium dioxide. The main method to improve the weather resistance of titanium dioxide is to perform inorganic surface treatment, which involves coating one or more layers of inorganic oxides or hydrated oxides on the surface of titanium dioxide particles.