China Tio2 Titanium Dioxide Rutile High Purity Chemical Raw Material For Painting And Coating

Short Description:

In the process of coating production, the dispersion of titanium dioxide directly affects the storage stability of water-based coatings, the appearance of the coating film and the difficulty of painting operations. As we all know, the dispersion of titanium dioxide includes three processes of titanium dioxide wetting, mechanical crushing and dispersion stability. In the production process of water-based coatings, the wetting process of titanium dioxide pigment is a process in which the interface of titanium dioxide – air, titanium dioxide – titanium dioxide particles is replaced by the interface of titanium dioxide – resin solution. The main factors that determine the wetting effect are the adsorption of resin solution on the surface of titanium dioxide pigment particles and the penetration of resin into the void of titanium dioxide pigment condensate. The crushing process is the process of the condensation or adhesion of titanium dioxide pigment particles being destroyed into fine particles by shear force or impact force, which is not only related to the equipment, but also related to the condensation state of titanium dioxide pigment. Dispersion stabilization is the process by which particles generate repulsion that prevents them from regrouping.
Performance of rutile titanium dioxide in water-based coatings
The pH value of titanium dioxide directly affects its application performance in water-based coatings. In fact, the pH value of titanium dioxide powder should be near neutral, but due to the different production process, calcination conditions, coating state, chemical composition and many other factors, resulting in the pH of titanium dioxide deviated from neutral. The pH value of titanium dioxide directly affects the stability of coating production. Therefore, the stability of titanium dioxide powder will have a very important significance for coating manufacturers. In addition, the pH value of titanium dioxide is acidic, and it is easy to cause the curing and drying speed of the coating production to be slowed down, and the dispersion is worse, which will seriously make the coating base gelatinization.