The additives used in the coating are mostly surfactants, by reducing the surface tension of the gas-liquid, liquid-solid or gas-solid interface, to achieve leveling, defoaming, dispersion and improve the effect of adhesion. Silicone compounds have low surface tension, high surface activity, in the coating system has a wide range of applications, is an important variety of coating additives. The silicone additives used in the coating system are divided from the chemical composition, mainly including silane and silicone oil. Silane is mainly a number of small molecular compounds, mainly used as adhesion promoter, crosslinking agent and dispersant in coatings; Silicone oil auxiliaries are mainly composed of modified silicone oil. By adjusting the relative molecular weight of the auxiliaries, the type and content of the modified group R and the types of functional groups of the end groups, various additives with different properties can be obtained.