Term Detail

Explanation

methylphenylsiliconeoil is a transparent oily liquid, which is linear polysiloxane, and contains the components of flat phenyl or diphenylsiloxane chain links. Compared with methyl silicone oil with the same viscosity, it shows some different characteristics. It has a higher viscosity temperature coefficient, lower solidification point and flash point. The compression resistance is lower than that of methyl silicone oil, and its viscosity is more sensitive to change under pressure. In addition, methyl phenyl silicone oil also has high oxidation stability and radiation resistance. The properties of the oil will change with the increase of phenyl content, including the increase of relative density and refractive index. At elevated temperatures, the performance of the oil remains unchanged after a period of time. In particular, silicone oil with high phenyl content shows excellent radiation resistance, and can continue to be used even after being irradiated with 5.16X10 ^ 12C/kg. In addition, its lubricating performance is also better than that of methyl silicone oil. Typical methylphenylsiliconeoil has a viscosity of 100 to 200mm ^ 2/s at 25 ° C, a relative density (25 ° C) of 1.02 to 1.08, a refractive index (25 ° C) of 1.480 to 1.495, a freezing point of less than -40 ° C, and a flash point (open cup) of more than 300 ° C. The preparation of methyl phenyl silicone oil is usually made by hydrolyzing diphenyldichlorosilane or methyl phenyl dichlorosilane, adding an appropriate amount of chain stopper, and then through catalytic equilibrium and removal of low molecular substances. In addition, diphenylsilanediol can also be prepared with octamethylcyclotetrasiloxane and chain stoppers under the catalytic equilibrium of alkali. methylphenylsiliconeoil is widely used in heat treatment bath of metal products, high-temperature heating oil, gas-liquid chromatography, high and low temperature lubricating oil of electronic and electrical equipment, impregnant of large power capacitor and other fields.