Phenyl silicone oil is the product after some methyl groups in methyl silicone oil are replaced by phenyl groups, and it has many special properties, such as small temperature-viscosity coefficient, high and low temperature resistance, oxidation resistance, high flash point, low volatility, good insulation, small surface tension, no corrosion to metals, non-toxicity, etc. The following are some advantages of phenyl silicone oil in lubrication:

• Good thermal stability: Phenyl silicone oil has good thermal stability and can maintain good lubrication performance in high-temperature environments. It can be applied in high-temperature equipment, such as the lubrication of high-temperature fan bearings, ball bearings, automotive engines, textile dryers, etc.
• Good low-temperature resistance: Low phenyl silicone oil has remarkable low-temperature resistance and is still fluid at -70°C, which is particularly suitable for occasions requiring high cold resistance.
• Good lubricity: With the increase of the mole fraction of phenyl groups, the lubricity of silicone oil increases. Phenyl silicone oil can reduce friction and wear and reduce the wear degree of mechanical equipment.
• Good insulation: Phenyl silicone oil has good electrical insulation performance and can block the conduction of electric current, and can be used as insulating lubricating oil for electronic and electrical equipment.
• Good radiation resistance: Medium phenyl and high phenyl silicone oil have good radiation resistance and can be used as heat treatment baths for metal products, high-temperature heating oil, gas chromatography carriers, etc.
• Good compatibility: The compatibility of phenyl silicone oil with cosmetic ingredients is better than that of methyl silicone oil. It is stable to heat and ultraviolet rays and has a unique luster. It is often used as an additive in personal care products such as skin care products and hair conditioners.
• High light transmittance and high refractive index: Silicone oil containing methyl phenyl siloxane chain segments can prepare colorless and transparent products with high phenyl content and moderate viscosity. Utilizing its characteristics of high light transmittance, high refractive index, good thermal stability, and radiation resistance, it can be used as an LED packaging material.

In general, phenyl silicone oil has advantages such as good thermal stability, good low-temperature resistance, good lubricity, good insulation, good radiation resistance, good compatibility, high light transmittance, and high refractive index in lubrication, and is an excellent performance lubricating oil.