Silicone oil is a kind of polyorganosiloxane with different polymerization degree chain structure. It is prepared by hydrolysis of dimethyl dichlorosilane with water to obtain the initial polycondensation ring. The ring is cracked and rectified to obtain the low ring. Then the ring, sealing agent and catalyst are put together to obtain a mixture of different polymerization degrees. The silicone oil can be prepared by vacuum distillation to remove the low boiling matter. The most commonly used silicone oil, whose organic groups are all methyl, is called methyl silicone oil.


Dimethyl silicone oil, also known as methyl silicone oil and polydimethylsiloxane, is odorless and non-toxic, has physiological inertia, good chemical stability, electrical conductivity and weather resistance, a wide range of viscosity, low freezing point, high flash point, good hydrophobic performance, and has high shear resistance. It can be used for a long time at a temperature of 50~180 ℃. It is widely used as insulation, lubrication, shockproof, dustproof oil, dielectric fluid and heat carrier, and can also be used as defoaming and film removal Additives for paints and daily cosmetics.