Phenyl silicone oil is a silicone oil with special properties. Its basic properties and lubricating properties are as follows:

1. Basic properties
Appearance: Phenyl silicone oil usually appears as a colorless to yellow transparent oil without mechanical impurities.
Chemical structure: Phenyl silicone oil is a product formed by the replacement of part of the methyl group in methyl silicone oil by phenyl groups, and its molecular structure contains phenyl groups.
Physical properties:
Viscosity-temperature coefficient: Compared with dimethyl silicone oil of the same viscosity, phenyl silicone oil exhibits a higher viscosity-temperature coefficient.
Freezing point: The freezing point of phenyl silicone oil is lower.
Flash point: The flash point of phenyl silicone oil is also relatively low.
Refractive index: The refractive index of phenyl silicone oil is higher than that of dimethyl silicone oil, which is 1.46. This property makes it suitable for use as a glossing agent in cosmetic formulations.
Weather resistance: Phenyl silicone oil has excellent weather resistance and can resist the erosion of harsh environmental factors such as ozone.
2. Lubricating properties
Lubricating effect: Phenyl silicone oil is used as a high and low temperature lubricant in the field of electronic and electrical equipment, which can effectively reduce friction and wear and extend the service life of the equipment. When carbon black, potassium soap or platinum disulfide are added, they can be made into high-temperature grease for lubrication of high-temperature fan bearings, ball bearings, automobile engines, textile dryers and other equipment.
High temperature resistance: With the increase of phenyl mole fraction, the high temperature resistance of silicone oil is significantly improved. Silicone oil with high phenyl content (such as phenyl mole fraction of about 45%) can remain stable in high temperature environment and is not easy to decompose or deteriorate.
Low temperature resistance: Silicone oil with low phenyl content (such as phenyl mole fraction of 5%~10%) is particularly suitable for occasions with high cold resistance requirements and can still be used normally at -70℃. However, it should be noted that with the increase of phenyl mole fraction, the low temperature resistance of silicone oil will show a downward trend.
3. Other application characteristics
Radiation resistance: Phenyl silicone oil has excellent radiation resistance and can remain stable in radiation environment.
Solubility: With the increase of phenyl mole fraction, the solubility of silicone oil in organic solvents is also improved.
Electrical properties: Phenyl silicone oil has excellent electrical properties and can be used as electrical insulation material.
In summary, phenyl silicone oil, with its unique chemical structure and physical properties, has demonstrated excellent performance in the lubrication field and many other application fields.