The difference between fluorosilicone rubber and silicone rubber

Fluorosilicone rubber has excellent oil resistance and solvent resistance, and is resistant to aliphatic, aromatic and chlorinated hydrocarbon solvents; various petroleum-based fuel oils, lubricants, hydraulic oils and certain synthetic oils (such as diester lubricants, Silicate hydraulic oil, etc.) have good stability at room temperature and high temperature, and can also maintain elasticity.


Fluorosilicone rubber properties


Oil, solvent and chemical resistance

Compared with methyl vinyl silicone rubber, fluorosilicone rubber has extremely excellent oil resistance, solvent resistance, and chemical resistance; even compared with fluororubber, its oil resistance and solvent resistance are also good. It shows excellent durability after immersion in the same medium, temperature, and time. It can be said that fluorosilicone rubber is the only elastomer that can withstand non-polar media at -60°C to 260°C. Fluorosilicone rubber also has relatively good resistance to methanol-containing gasoline. Even in a gasoline/methanol mixed system, the hardness, tensile strength, and volume changes of its vulcanized rubber are very small. After a long 500-hour immersion test, various physical properties Very little has changed either.


heat resistance

The high temperature resistance of fluorosilicone rubber is the same as that of silicone rubber. It can be significantly improved by adding a small amount of heat stabilizers such as iron, titanium, and rare earth oxides. It has sufficient heat resistance even at high temperatures of 250°C. . Temperature has a greater impact on fluorosilicone rubber than silicone rubber.


cold resistance

Fluorosilicone rubber, like ordinary silicone rubber, has good low-temperature properties. Since fluorosilicone rubber is a linear polymer composed of soft Si-O as the main chain, its low temperature characteristics are better than those of fluororubber with C-C as the main chain. Among them, fluorosilicone rubber has better low-temperature characteristics, and its brittleness temperature can reach -59°C, while ordinary fluorosilicone rubber is about -30°C.


Physical and mechanical properties

Fluorosilicone rubber, like ordinary silicone rubber, can be made into conductive, antibacterial, flame retardant, and foaming fluorosilicone rubbers by optimizing the material formula design. On the basis of the original oil-resistant and solvent-resistant properties, it can increase conductivity, antibacterial, and Flame retardant, foaming and other properties.


Other features

Fluorosilicone rubber has excellent weather aging resistance and still maintains good performance even after 5 years of exposure. Ozone is one of the most generated gases when elastomers age. However, no cracks or cracks were found in fluorosilicone rubber after passing dynamic or static tests, and it has good ozone resistance. In addition, fluorosilicone rubber has very good mildew resistance, physiological inertness, and anticoagulant properties. Fluorosilicone rubber changes very little under harsh conditions such as high temperature, low temperature, moisture, oil, solvents, chemicals, and ozone. The radiation resistance of fluorosilicone rubber is not outstanding, but its radiation aging resistance is better than that of methyl vinyl silicone rubber.


Fluorosilicone rubber product applications


1. Aviation industry: seals and contacts for fuel oil and lubricating oil on aircraft, such as various O-rings, gaskets, sealing rings, sensor materials, diaphragms, fluorosilicone gasket clamps, and can also be used in aircraft fuel tanks overall seal.

2. Automobile industry: various types of vehicle turbocharger tubes, sealing rings, oil seals, diaphragms, conduits, valve linings, etc.

3. Medical and health care: used in medical devices and artificial organs, such as medical catheters, drainage tubes, artificial valves, etc.

4. Military industry: used in harsh environments that require low temperature resistance, oil resistance, and acid resistance, such as the infusion bellows of the hydraulic system of military aircraft, doors and windows of special vehicles, back cover seals, and sensing materials for sensors.

5. Petrochemical industry: various types of seals for pumps, valves, oil tanks and other equipment that are resistant to high temperatures, low temperatures and chemical erosion.

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