Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

9-255-500 Phenylmethyl Silicone Oil

Dow Corning 9-255-500 Phenylmethyl Silicone Oil is a high-purity, low-volatility fluid from the Dow Corning 9-Series. Featuring excellent thermal stability, low surface tension, and broad compatibility with organics, it’s widely used in coatings, release agents, and high-temp lubricants. Its phenylmethyl structure enhances oxidation resistance versus standard dimethyl silicones.
  • 9 255 500 phenylmethyl silicone oil_b2ac772c
  • 9 255 500 phenylmethyl silicone oil_b2ac772c

Features Of 9-255-500 Phenylmethyl Silicone Oil

  1. Excellent thermal stability up to 250 °C, maintaining viscosity integrity under prolonged high-temperature exposure.

  2. Superior oxidative resistance compared to standard methyl silicone oils, minimizing degradation in demanding environments.

  3. Low volatility and high flash point (≥300 °C), enhancing process safety and reducing evaporation loss during handling.

  4. Good compatibility with organic polymers, resins, and fillers—ideal for formulating high-performance composites and coatings.

  5. Hydrophobic yet non-yellowing, providing long-term clarity and surface protection in optical and electronic applications.

Typical Applications Of 9-255-500 Phenylmethyl Silicone Oil

  1. High-temperature heat transfer fluids in industrial circulation systems and thermal management units.

  2. Base fluid in specialty lubricants for precision instruments, vacuum pumps, and aerospace mechanisms.

  3. Viscosity modifier and release agent in silicone rubber and RTV/HTV compound processing.

  4. Dielectric fluid in high-voltage transformers and capacitors requiring stable insulation performance.

  5. Carrier medium for functional additives in LED encapsulants and optical adhesives.

Specifications Of 9-255-500 Phenylmethyl Silicone Oil

Chemical TypePhenylmethyl polysiloxane
Product FormClear, colorless to pale yellow liquid
AppearanceHomogeneous, transparent, free from visible particles or haze
Viscosity (25 °C, cSt)500 ± 10%
Density (25 °C, g/cm³)0.98–1.02
Flash Point (COC, °C)≥300
Refractive Index (25 °C)1.495–1.505
Volatility (150 °C, 2 hrs, wt%)≤1.5


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