Fluorine silicone rubber compared silicone rubber, what is the difference?

Fluorosilicone rubber has excellent oil resistance and solvent resistance to aliphatic, aromatic and chlorinated hydrocarbon solvents; All kinds of petroleum-based fuel oils, lubricating oils, hydraulic oils and some synthetic oils (such as diester lubricants, silicone hydraulic oils, etc.) have good stability at room temperature and high temperature, and can also maintain elasticity.

                                             Characteristics of fluorosilicone rubber

Oil, solvent and chemical resistance

Compared with methyl vinyl silicone rubber, fluorine silicone rubber has excellent oil resistance, solvent resistance and chemical resistance. Even compared with fluorine rubber, oil resistance and solvent resistance are good. After dipping in the same medium, temperature and time, it shows excellent durability, and it can be said that fluorosilicone rubber is the only elastomer resistant to non-polar media at -60 ° C ~ 260 ° C. The resistance of fluorine silicone rubber to methanol containing gasoline is also relatively good, even in the gasoline/methanol mixed system, the hardness, tensile strength, volume changes of its vulcanized rubber are very small, after 500h long time impregnation test, the physical properties are almost unchanged.

Heat resistance

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

Cold tolerance

Fluorine silicone rubber and ordinary silicone rubber, low temperature performance is good. Because fluorine silicone rubber is a linear polymer composed of soft Si-O main chain, the low temperature characteristics are better than fluorine rubber with C-C main chain. Among them, fluorine silicone rubber has better low temperature characteristics, and the brittle temperature can reach -59 ° C, while the general fluorine rubber is about -30 ° C.

Physical and mechanical properties

Like ordinary silicone rubber, fluorine silicone rubber can be made conductive, antibacterial, flame-retardant and foamed by optimizing the material formula design. On the basis of the original oil resistance and solvent resistance, conductive, antibacterial, flame-retardant and foaming properties can be increased.

Other characteristics

The weathering resistance of fluorosilicone rubber is very good, and even after 5 years of exposure, it still maintains good performance. Ozone is one of the most generated gases during the aging of elastomers, but the phenomenon of cracking or cracking was not found after dynamic or static tests of fluorosilicone rubber, which has good ozone resistance. In addition, fluorine silicone rubber mildew resistance, physiological inertia, anticoagulation is also very good, fluorine silicone rubber in high temperature, low temperature, humidity, oil, solvents, chemicals, ozone and other harsh conditions change very little. The radiation resistance of fluorosilicone rubber is not outstanding, but the radiation aging resistance is better than that of methyl vinyl silicone rubber.

                                        Fluorosilicone rubber product application

1, aviation industry: aircraft fuel oil, lubricating oil seals, contacts, such as a variety of O-rings, gaskets, sealing rings, sensor materials, diaphragms, fluoro-silicon gaskets, can also be used for the overall sealing of aircraft fuel tanks.

2, automotive industry: all kinds of vehicle turbocharging tube, seal ring, oil seal, diaphragm, conduit, valve lining, etc.

3, medical and health: used for medical devices and artificial organs, such as medicinal catheters, drainage tubes, artificial valves, etc.

4, military industry: used in the need of low temperature, oil resistance, acid resistance in the harsh environment, such as military aircraft hydraulic system infusion bellows, special vehicle doors and Windows, back cover seals, sensors with sensing materials.

5, petrochemical: all kinds of high temperature, low temperature, chemical erosion resistance pump, valve, oil tank and other equipment seals.