Fluorine silicone rubber has outstanding high-temperature resistance, oil resistance, especially resistance to diester oil, chemical resistance, good physical and mechanical properties, satisfactory dielectric properties, non-flammability, weather resistance, and excellent vacuum performance, and radiation resistance; Usually can be used for a long time at 275°C, and short-term use at 320°C; oil resistance and acid resistance are better than 1# glue; weather resistance, ozone resistance, radiation resistance, air permeability, electrical properties, and flame resistance are similar to 2# glue. Widely used in aerospace, automobile, machinery, petrochemical, and other fields. For example, it is used as a dynamic and static sealing material for the hydraulic system and lubrication system of an aircraft; it is used as a sealing material in an oil field, on a cable pipeline for an oil field, and on drilling equipment; in the chemical industry, it is used as a lining for equipment, flexible connections of pipelines, pumps, etc. Or as a durable Corrosion sealing material, made of pipes, used to transport organic solvents or other corrosive media, etc.
Compared with methyl vinyl silicone rubber, fluorine silicone has excellent oil resistance, solvent resistance, and chemical resistance; even compared with fluoro rubber, oil resistance and solvent resistance are also good. After dipping in the same medium, temperature, and time, they all show excellent durability. It can be said that fluorine silicone rubber is the only elastomer that is resistant to non-polar media at -68°C to 232°C. The resistance of fluorine silicone rubber to gasoline-containing methanol is also relatively good. Even in the gasoline/methanol mixed system, the hardness, tensile strength, and volume change of the vulcanized rubber are very small. After a 500h long-term immersion test, the physical properties There was also little change.
The pyrolysis of fluorine silicone is the same as that of silicone rubber, namely: side chain oxidation, main chain breakage, side chain thermal decomposition, and various compound reactions. Since the decomposition products can also cause the main chain to break, the heat resistance is usually worse than that of silicone rubber, and it has begun to oxidize and age at a temperature of 200°C. However, it can be significantly improved by adding a small number of heat stabilizers such as iron, titanium, and rare earth oxides, and it has sufficient heat resistance even at a high temperature of 250°C. The influence of temperature on fluorine silicone rubber is greater than that of silicone rubber but smaller than that of fluoro rubber.
The weather resistance of fluorine silicone is very good, 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 no cracks or cracks have been found in fluorine silicone rubber through dynamic or static tests. In addition, the mildew resistance, physiological inertia, and anticoagulant properties of fluorine silicone rubber are also very good. fluorine silicone is resistant to olive oil, safflower oil, cleansing oil, lubricating oil, brake oil, hydraulic oil, and other inorganic, organic, polar, and non-polar oils do not expand, does not shrink, has stable dimensions, and lasts for oil resistance long.
fluorine silicone is mainly used in the preparation of heat-resistant, oil-resistant, and acid-resistant rubber products. Such as seals, hoses, rubber pads, etc. The product can be used for a long time at 250°C and short-term at 300°C. Its oil resistance is better than other fluoro rubbers, and it can be used for parts that require oil resistance. Examples are as follows: used as "○" rings, V-shaped sealing rings, oil seal cups with metal skeletons, valve gaskets, etc. These sealing materials can work at a temperature of 200-250°C for a long time and at a temperature of 300°C for a short time. In the petroleum industry: F26 rubber seals are used in drilling machinery, oil refining equipment, and natural gas desulfurization equipment, and can withstand harsh conditions such as high temperature, high pressure, oil, and strong corrosive media. In the chemical industry: F26 seals are used in pumps, pipe joints, and equipment containers to seal chemical substances such as inorganic acids and organic substances. In terms of building material manufacturing: F26 can be used as the sealing rubber ring of a cement single chamber pump, and the service life of the sealing ring made of natural rubber is about 10 times longer.
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