Silicone oil generally refers to linear polysiloxane products that remain liquid at room temperature. Generally divided into two types: methyl silicone oil and modified silicone oil. The most commonly used silicone oil-methyl silicone oil,also known as ordinary silicone oil, its organic groups are all methyl, methyl silicone oil has good chemical stability, insulation, and good hydrophobic properties.
Silicone oil is prepared by hydrolyzing dimethyldichlorosilane with water to obtain the primary polycondensation ring body. The ring body is cracked and rectified to obtain the low ring body. Then the ring body, the capping agent, and the catalyst are put together to obtain each A mixture of different polymerization degrees can be obtained by vacuum distillation to remove low-boiling substances.
Silicone oil is generally colorless (or light yellow), odorless, non-toxic, and non-volatile liquid. Silicone oil is insoluble in water, methanol, ethylene glycol and 2-ethoxyethanol. It is miscible with benzene, dimethyl ether, methyl ethyl ketone, carbon tetrachloride or kerosene. It is slightly soluble in acetone, dioxane, ethanol and Butanol. It has a small vapor pressure, a higher flash point and ignition point, and a lower freezing point.
If you want to make low-viscosity silicone oil, you can use acid clay as a catalyst and telomerize at 180°C, or use sulfuric acid as a catalyst to telomerize at a low temperature to produce high-viscosity silicone oil or viscous. Alkaline catalyst. Silicone oil has heat resistance, electrical insulation, weather resistance, hydrophobicity, physiological inertia and small surface tension. In addition, it also has a low viscosity-temperature coefficient, high compression resistance, and some varieties also have radiation resistance. .