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

9-255-300 Phenylmethyl Silicone Oil

Dow Corning 9-255-300 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 specialty coatings, release agents, and high-temp lubricants. Its phenylmethyl structure enhances oxidation resistance versus standard dimethyl silicones.
  • 9 255 300 phenylmethyl silicone oil_c1739fd0
  • 9 255 300 phenylmethyl silicone oil_c1739fd0

Features Of 9-255-300 Phenylmethyl Silicone Oil

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

  2. Superior oxidative resistance due to phenyl group incorporation, minimizing degradation in air-rich or accelerated aging environments.

  3. Broad compatibility with organic polymers, resins, and elastomers—ideal for formulating high-performance blends.

  4. Low volatility and negligible evaporation loss, ensuring long-term lubricity and film integrity in sealed or open systems.

  5. Outstanding dielectric properties with high volume resistivity (>1 × 10¹⁴ Ω·cm) and low dissipation factor across wide temperature ranges.

Typical Applications Of 9-255-300 Phenylmethyl Silicone Oil

  1. High-temperature lubricants for precision instruments, oven chains, and semiconductor manufacturing equipment.

  2. Dielectric fluid in high-voltage transformers, capacitors, and potting compounds requiring thermal resilience.

  3. Release agent for composite molding (e.g., carbon fiber prepreg, silicone rubber tooling) at elevated cure temperatures.

  4. Base fluid in specialty greases for aerospace actuators and automotive turbocharger bearings.

  5. Additive in heat-transfer fluids for solar thermal systems and industrial thermal oil circuits.

Specifications Of 9-255-300 Phenylmethyl Silicone Oil

Chemical TypePhenylmethyl polysiloxane
Product FormClear, colorless to pale yellow liquid
AppearanceHomogeneous, transparent, free of sediment or haze
Viscosity (25 °C, cSt)300 ± 30
Density (25 °C, g/cm³)1.04–1.07
Refractive Index (25 °C)1.500–1.515
Flash Point (COC, °C)≥310
Volatility (150 °C, 24 h, wt%)≤0.5


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