Momentive fluorosilicone elastomers are an excellent choice for applications that require chemical, fuel, or solvent resistance under a wide range of temperatures. They are also unaffected by ozone, UV and gamma radiation, and harsh weather conditions like rain, frost, and snow.
Why Momentive fluorosilicones?
• Excellent resistance in automotive fluids like engine and hydraulic oils, fuels, and various mixtures
• High thermal stability
• Lowest temperature flexibility of all fluoroelastomers
• Constant modulus over a wide temperature range
• Low hardness without the addition of plasticizers
• Good tear strength
• Low compression set
Momentive fluorosilicones applications:
Momentive fluorosilicones are the top choice for use in fuel systems. They offer a combination of high thermal stability up to +177°C (+350°F) and a superior resistance to petroleum fuels and hydrocarbon fluids. This makes them excellent for use in a wide array of applications such as:
Types of fluorosilicones:
Over the last several years, the marketplace for molded silicone rubber parts has moved toward the use of liquid silicone rubber (LSR) due to its ease of processability, design versatility, excellent quality, and high productivity.
Liquid silicone rubbers offer intermediate fuel and solvent resistance; however, in very harsh environments, heat-cured fluorosilicones are still the material of choice due to their higher fluorine content, thermal stability, and superior solvent resistance. Fluorosilicone elastomers are primarily available in two primary forms:
FSE Heat-Cured Elastomers: They can be processed with conventional high consistency rubber processes, including injection molding, transfer or compression molding, extrusion, and calendering molding.
FSL Liquid Silicone Rubber: This range of products is excellent for use in conventional LSR injection molding applications.
Momentive fluorosilicones offer superior resistance compared to traditional VMQ silicones:
Superior resistance compared to traditional silicones:
VMQ silicones offer good flexibility, insulation, and heat resistance. However, fluorosilicones (FVMQ) have fluorinated side chains that provide superior resistance to oils, fuels, and hydrocarbon fluids.
Superior mechanical properties and strength:
It can be challenging to reach low hardness with various elastomers. Momentive fluorosilicone elastomers enable low hardness down to 20 Shore without the need for plasticizers. They also show excellent dielectric strength, arc resistance, and low compression for sealing applications like O-rings and gaskets with complex designs.
Momentive fluorosilicones sealing applications:
Momentive fluorosilicone elastomers are used in almost all industries ranging from automotive and aerospace to chemical processing, and O&G explorations. Applications include:
• O-rings and gaskets
• Membranes and diaphragms
• Seals in contact with fuel and oil
• Turbo-charger hoses
Momentive HCR Fluorosilicones: