The chemical name of titanium dioxide is titanium dioxide (TiO2), which is also the world's most recognized white pigment. There are two manufacturing methods, a sulfuric acid method and a chlorination method. At present, 55% of the world's products are chlorination products. In developed countries in Europe and America, the proportion of chlorination has reached 70%. In recent years, China has also vigorously promoted the Titanium Dioxide Project. As far back as 2005, it has been listed as an encouraged project of the Industrial Structure Adjustment Guidance Catalogue (2005).
First, the comparison in coating applications
The coatings industry is the largest user of titanium dioxide, especially rutile titanium dioxide, which is mostly consumed by the coatings industry. TiO2 consumed by the global coatings industry accounts for 58% to 60% of the total consumption of titanium dioxide pigments. China's consumption ratio is higher, about 60% to 65%. Titanium dioxide is one of the most used pigments in the coatings industry, accounting for half of the cost of paint colorants. The consumption in the coatings industry accounts for 90% of the total amount of various pigments consumed by the coatings industry, and 10% of the cost of coating materials. 25%.
It is well known that the process of titanium dioxide is mainly divided into a sulfuric acid process and a chlorination process, and the performance of the products differs depending on the production raw materials and the process procedures. Based on the use characteristics of different coatings, there are different requirements on the weather resistance, hiding power, aesthetics and dispersibility of titanium dioxide. The application effects of the two different production processes of sulfuric acid and chlorination are as follows:
In terms of usage, sulphate rutile is usually 5% to 15% more than chlorinated rutile. In terms of dispersibility, the rutile method of sulfuric acid is about 10% worse than the rutile method of chlorination. In terms of hiding power, chlorinated rutile titanium dioxide is 10% to 15% higher than sulfuric acid rutile. In terms of surface properties, fluidity, yellowing resistance, and color stability, chlorinated rutile titanium dioxide is superior to sulfuric acid rutile titanium dioxide.
Therefore, it is very important for customers to choose the type of titanium dioxide that meets the performance requirements of coatings and coatings according to the requirements of coating performance. It can be seen from the comparison that the current titanium dioxide is the best rutile titanium dioxide produced by the chlorination method, and is the best white pigment on the market. It has excellent comprehensive performance and is the preferred white pigment in the coating. A must-have pigment for color coatings. Due to the different surface treatment processes, titanium dioxide has different types, and can be selected according to the characteristics of the formulated coating, such as whether high gloss, high hiding power, or high anti-pulverization property is required. The rutile titanium dioxide produced by the sulfuric acid process has a lower conversion rate of anatase to rutile than the chlorination method, so the whiteness and stability of the product are slightly worse than the chlorination method, but the price is lower.