In Coating Applications, the Difference between Sulphate and Chloride Titanium Dioxide
The coating industry is the largest user of titanium dioxide, especially rutile titanium dioxide, most of which is consumed by the coating industry. The global coating industry consumed TiO2 accounted for 58% to 60% of the total consumption of titanium dioxide pigments, China's consumption of this proportion is higher, about 60% to 65% or so.
Titanium dioxide is one of the most used pigments in the coating industry, accounting for half of the cost of coat colorants, and its consumption in the coating industry accounts for 90% of the total consumption of various pigments in the coating industry and 10% to 25% of the cost of coat raw materials.
As we all know, the process of titanium dioxide is mainly divided into sulphate process and chloride process, the two due to the different production of raw materials and process procedures, resulting in the performance of the product has its own advantages and disadvantages. Based on the characteristics of different coatings, titanium dioxide weatherability, coverage, aesthetics, dispersion have different requirements, the application of two different production processes sulfuric acid method and chloride method are as follows:
* In terms of quantity used, sulphate rutile is usually 5% to 15% more than chloride rutile.
* In terms of dispersibility, sulphate rutile is about 10% worse than chloride rutile.
* In terms of covering power, chloride rutile titanium dioxide is 10% to 15% higher than sulphate rutile.
* In terms of surface properties, fluidity, yellowing resistance, and color mixing stability, chloride rutile titanium dioxide is better than sulphate rutile titanium dioxide.
According to the requirements of coating performance, it is important to choose the titanium dioxide species that can meet the requirements of coating and coating film performance. From the comparison, it can be seen that the current titanium dioxide is the best rutile titanium dioxide products produced by the chloride process, which is the best white pigment in the current market, with excellent overall performance, and is the preferred white pigment in coatings, as well as the necessary pigment for light-colored coatings. Due to the different surface treatment process, there are different types of titanium dioxide, you can choose the specific species according to the characteristics of the formulated paint, such as whether to require high gloss, or high covering power, or high anti-powdering properties.
