FMQ (Fluorosilicone Rubber)

Fluorosilicone rubber (FVMQ)

• FMQ is a silicon rubber with modified fluoride, which contains trifluoro-propyl in silicone rubber. This rubber is called either FMQ or FVMQ according to ISO 1629. In general, FMQ is compounded and machined with a tendency similar to normal silicon rubber.
• The most practical properties of FMQ are its improved resistance to fluid along with the general properties of silicone rubber. However, its limitations in applying to high temperatures has become greater. As the long-term FMQ heat resistance is not as good as normal silicon rubber or FKM vulcanizate, the maximum temperature available for continuous use is about 175°C.

Application

• FMQ is more expensive than normal silicon rubber, but it is used where excellent flexibility at low temperatures and low swelling in fluids are required. Except for ketones and a few types of esters, the resistance of FMQ to fluids is relatively good.
• In general, it is used for a wide variety of seals, gaskets, o-rings, diaphragms, electrical connections, automobile parts, fuel gas valves, and various parts of jet engines and spacecraft.

Property table of materials (ASTM D2000)