Silicone oils are divided by chemical structure, including methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen silicone oil, methyl phenyl silicone oil, methyl chlorophenyl silicone oil, methyl ethoxy silicone oil, methyl trifluorosilicone Propyl silicone oil, methyl vinyl silicone oil, methyl hydroxy silicone oil, ethyl hydrogen silicone oil, hydroxy hydrogen silicone oil, cyano silicone oil, etc.

From the point of use, there are damping silicone oil, diffusion pump silicone oil, hydraulic oil, insulating oil, heat transfer oil, brake oil, etc.

According to the processing status, it can be divided into primary products and secondary products. The former refers to the silicone oil products before processing, including four categories: hydroxyl silicone oil, silicon functional silicone oil, carbon functional silicone oil and inactive modified silicone oil. Traditionally, the first two types are called linear silicone oils, and the latter two types are called modified silicone oils; the latter are made of silicone oil as raw materials, mixed with thickeners, surfactants, solvents and additives, and processed through a specific process. Grease, emulsion and solution products, such as silicone grease, silicone paste, defoamer, release agent and release agent, etc.

Silicone oils are often not used alone, but are effectively applied through special formulations; they are not used as raw materials, but as auxiliary materials to produce a certain effect. Generally speaking, there are three basic forms of silicone oil on the market: pure silicone oil, solution, and emulsion.

○ 100% pure silicone oil
Pure silicone oil is very stable, heat-resistant, freeze-resistant, good in storage, has high flash point and high ignition point, and has few storage and transportation problems.

○ Solution
In fact, it is often necessary to dilute the silicone oil solution, and it is not convenient for users to configure the solution by themselves. When in use, it is sometimes desirable to add active adjuvants (catalysts, cross-linking agents, etc.) to the solution to facilitate storage and use. Aliphatic, aromatic or chlorinated hydrocarbons can be used as solvents as desired. Other types of solvents are only used under special circumstances. High molecular polysiloxane solution, the concentration can only reach 35%, otherwise the viscosity is too high.

○ Lotion
A large part of silicone oil or products containing silicone oil are made in the form of emulsion. Compared with solvent silicone oil, it has the advantages of cheap, non-flammable, and harmless to health. Different from solvent-based, all silicone emulsions are "oil-in-water" (O/W) heterogeneous systems. Its external closed phase is the water phase. The silicone oil is dispersed in the water phase in very fine droplets, which is easy Dilute with water to desired concentration for application. The stability of this emulsion can be achieved by making the droplets as fine as possible and by the stabilizing effect of the emulsifier.