Silicone oil is a kind of oily linear polysiloxane produced from the hydrolysis and poly-condensation of chlorotrimethylsilane, ethyl chlorosilane, and phenyl chlorosilane containing mono-functional group and bifunctional group. The commonly called silicone oil means the polydimethylsiloxane and polymethyl phenyl siloxane. Silicone oil is a kind of colorless, odorless, non-toxic, transparent, non-volatile liquid with non-corrosive effect on metal, low freezing point and good anti-water property and moisture resistance, low surface tension and being capable of being resistant to dilute acids and bases and has wide application in various national economy departments.