In high-temperature resistant coatings, pigments not only play a coloring role but also have a reinforcing effect on the base material. Common pigments are mostly inorganic compounds, such as titanium dioxide, carbon black, iron oxide red, chrome green, ultramarine blue, chrome yellow, etc., while organic pigments like toluidine red, phthalocyanine blue and phthalocyanine green are also very stable pigments. Carbon black is the most commonly used pigment in high-temperature resistant paints. It has a reinforcing effect on most rubber-based materials and can significantly improve the physical and mechanical properties of the base material without any additives. This indicates that the interaction between the base material and carbon black is merely a physical process of lubrication, dispersion and encapsulation, and there are also chemical bonds involved, thereby increasing the strength of the base material. Kaolin, talc powder, diatomite and other silicates can all be used as fillers for high-temperature resistant protective coatings. Fillers can improve the process performance of the base material, enhance the heat resistance, wear resistance and chemical medium resistance of the coating. At the same time, fillers are inexpensive, which can reduce the cost of the coating and improve the tensile strength and physical mechanical properties of the coating.

source:耐高温颜料的选择和作用-广东昊阳化工有限公司_涂料_塑胶_油墨 (hao-yang.cn)