Compared with dimethyl silicone oil of the same viscosity, phenyl silicone oil shows higher extreme pressure resistance performance. The following is a detailed description of phenyl silicone oil's extreme pressure resistance performance:

1. Overview of extreme pressure resistance performance
Extreme pressure resistance performance is an important indicator to measure whether a material can maintain its original performance and structural stability under extreme pressure conditions. Due to its special molecular structure and chemical properties, phenyl silicone oil can show excellent stability when subjected to high pressure.

2. Advantages of phenyl silicone oil's extreme pressure resistance performance
High viscosity-temperature coefficient: Phenyl silicone oil has a high viscosity-temperature coefficient, which means that its viscosity changes relatively little when the temperature changes, so that it can maintain stable lubrication performance under extreme pressure conditions.
Good compressibility: Under pressure environment, phenyl silicone oil has good compression resistance and its viscosity changes relatively quickly, which helps to form a stable lubricating film under high pressure conditions and reduce friction and wear.
Excellent lubricity: Phenyl silicone oil has excellent lubrication performance and can form a uniform lubricating film on the friction surface, reducing the friction coefficient, wear and energy loss.

3. Application of phenyl silicone oil's extreme pressure resistance
High vacuum diffusion pump: Low-viscosity phenyl silicone oil for high vacuum diffusion pump is a special silicone oil designed for high vacuum diffusion pump. It has the advantages of high boiling point, low vapor pressure, anti-oxidation, anti-radiation, and non-hydrolysis, and can meet the special requirements of high vacuum diffusion pump for oil.
Heat treatment of metal products: Medium phenyl and high phenyl silicone oils have high thermal stability and good radiation resistance. They can be used as heat treatment baths and high-temperature heating oils for metal products.
Electrical equipment lubrication: Medium phenyl and high phenyl silicone oils can be used as high and low temperature lubricants for electronic and electrical equipment. High-temperature greases made with carbon black, lithium soap or molybdenum disulfide can be used for lubrication of high-temperature fan bearings, ball bearings, automobile engines, textile dryers, etc.
Silicone rubber preparation: Phenyl vinyl silicone oil and phenyl hydrogen silicone oil can be used to prepare high-temperature and radiation-resistant addition silicone rubber to improve the high temperature and radiation resistance of rubber.

4. Factors affecting the extreme pressure resistance of phenyl silicone oil
Phenyl content: With the increase of phenyl mole fraction, the high temperature resistance, radiation resistance, lubricity and solubility in organic solvents of phenyl silicone oil are significantly improved, but the low temperature resistance shows a downward trend. Therefore, when selecting phenyl silicone oil, it is necessary to select the appropriate phenyl content according to the specific application scenario and requirements.
Additives: The extreme pressure resistance of phenyl silicone oil can be further improved by adding specific additives. For example, adding antioxidants can improve its antioxidant properties, and adding extreme pressure anti-wear agents can improve its anti-wear properties.

In summary, phenyl silicone oil has excellent extreme pressure resistance and is widely used in many fields. When selecting and using, it is necessary to select the appropriate type and specification of phenyl silicone oil according to the specific application scenario and requirements.