Methyl-terminated fluorosilicone oil (also known as methyl fluorosilicone oil) is a trifluoropropyl-modified organosilicon compound. It combines high and low temperature resistance (operating temperature range -60 to 200°C) with the oil, solvent, and chemical stability of fluorinated compounds. Its molecular structure features a methyl-terminated fluorosilicone oligomer with trifluoropropyl functional groups in the side chains, imparting low surface tension (20-25 mN/m) and hydrophobic and oleophobic properties.
Physical Properties
It is a colorless or pale yellow, transparent liquid with a viscosity range of 30 to 10,000 mm²/s (25°C) and a temperature resistance range of -60 to 200°C. Its volatile matter is less than 5% after heating at 200°C for 4 hours, and its melting temperature range is -47 to -31°C.
Main Applications
Solvent-Resistant Lubricants: As a base oil component, it is suitable for lubrication requirements under extreme operating conditions, such as in aircraft hydraulic systems. Defoaming Agent: Reduces foaming by over 85% in textile printing and dyeing applications. Used in the formulation of solvent-resistant greases in industrial applications.
Sealant and Release Agent: Offers excellent corrosion resistance and is suitable for complex mold environments. It requires sealed storage to maintain stability.
Textile Finish: Improves the hydrophobicity of polyester fabrics (contact angle up to 135°) and is used in specialty textile processing.