Products Description: Clearco offers a full line of Phenyl class silicones. They are organized into 3-categories: Diphenyl-Dimethylsiloxane, Phenylmethylsiloxane, and Diffusion Pump Fluids (Tetraphenyl-tetramethyltrisiloxane)(Pentaphenyl-trimethyltrisiloxane). Phenyl-based silicones are formulated for applications where Dimethyl silicones (polydimethylsiloxane) will not remain stable. These fluids are described as aromatic siloxanes due to the presence of phenyl groups. High phenyl content fluids are utilized as heat exchange fluids, dielectric coolants, and base oils for high temperature fluids. Low phenyl content fluids can be utilized for similar applications, but are also used at lower temperatures than higher phenyl content fluids. Applications for Low phenyl content fluids include wide temperature range baths, low temperature baths, and fluids for sensitive timing and calibration devices.
Phenyl-based silicones replace methyl groups with phenyl groups. With the introduction of phenyl groups into the polysiloxane, oxidation resistance, thermal stability and shear resistance are enhanced. At elevated temperatures, phenyl-based silicones are more stable and resistant to thermal and oxidizing attack. In addition, refractive index is increased, making them suitable fluids where the RI matches that of optical fibers, allowing for invisible connections and transparent blends.
Low viscosity phenyl fluids (DPF-7040 & DPF-7050) are formulated for use as diffusion pump fluids. They are designed for fast pumping of large volumes of gas or vapor in production operations.
DPF-7040 Tetraphenyl-tetramethyltrisiloxane (CAS# 3982-82-9)
DPF-7050 Pentaphenyl-trimethyltrisiloxane