The Physical And Chemical Properties Of Silicone Oil

Mar 27, 2021

Melting point: -50°C

Boiling point: 101 °C (lit.)

Refractive index: 1.403-1.406

Flash point: 300℃

Density: 0.963g/mL


Expansion coefficient (25-100℃): 9.45×10-4 silicone oil

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. As the number of segments n is different, the molecular weight increases and the viscosity also increases. The solid silicone oil can have a variety of different viscosities, from 0.65 centistokes to millions of centistokes. 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. .

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