Fundamental Material Attributes IOTA BJ550 is a methylphenyl polysiloxane polymer, appearing as a colorless transparent liquid. Its flash point is ≥300°C, fire point exceeds 343°C, autoignition temperature is 482°C, and pour point reaches -50°C, collectively establishing a stable operating window across a wide temperature spectrum. At 25°C, it has a kinematic viscosity of 125 mm²/s and a specific gravity of 1.11, balancing fluidity and density for practical handling and application. Thermal Management and Oxidation Stability IOTA BJ550 demonstrates good oxidation resistance and thermal stability, performing reliably in heat transfer applications. Its thermal conductivity at 50°C is 0.00035 g-Cal/cm²-sec-℃, and specific heat at 100°C is 0.396, indicating effective heat dissipation capabilities. Furthermore, volatility is limited to 2.1% after 4 hours at 250°C, minimizing evaporation losses and extending service intervals, which reduces maintenance demands and operational downtime. Shock Absorption and Damping Utility The material’s compressibility makes it practical for shock absorption and motion damping. At 1000 psi, the compression rate is 0.50% with a bulk modulus of 200,000; as pressure increases to 5000 psi, 10,000 psi, and 20,000 psi, the compression rate rises to 2.30%, 3.95%, and 6.50%, respectively, with corresponding bulk moduli of 217,000, 253,000, and 308,000. This progressive compression response allows adaptation to varying intensities of impact and vibration, ensuring consistent performance in dynamic mechanical environments. Operational Application Overview IOTA BJ550 is applicable in hydraulic arresters, shock absorbers, nuclear power plant hydraulic drive valves, and instruments requiring radiation resistance. It also functions as a high-temperature heat transfer fluid, base oil for high-temperature lubricants and greases, and a medium for insulation, lubrication, damping, vibration isolation, and dust protection. Its chemical inertness ensures compatibility with metals and seals, broadening its utility across a wide range of industrial scenarios where material reliability and versatility are critical.
IOTA BJ550 Polyphenylmethyldimethylsiloxane -IOTA