FVMQ O-ring

FVMQ O-ring

Introduction to FVMQ O-ring

The resistance of fluorine silicone rubber to methanol containing gasoline is 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. On the basis of maintaining the excellent properties of silicone materials such as heat resistance, cold resistance, high voltage resistance and climate aging resistance, FVMQ O-ring also has excellent hydrogen solvent resistance, oil resistance, acid and alkali resistance and lower surface energy performance of organic fluorine materials due to the introduction of fluorinated groups. With various additives, it can be mixed into a homogeneous compound. Under the action of organic peroxide, it can be vulcanized into various elastic rubber products. In addition to the characteristics of general silicone rubber, there are excellent resistance to aviation fuel oil, hydraulic oil, oil, chemical reagents and solvents. It can work for a long time at -55 ~ +200℃.

Features of FVMQ O-ring

FVMQ is a kind of silicone rubber with side chain introduction of fluoroalkyl. The commonly used FVMQ is fluoro-silicone rubber containing methyl, trifluoropropyl and vinyl.

FVMQ O-ring has good heat resistance and excellent oil and solvent resistance, such as aliphatic hydrocarbon, aromatic hydrocarbon, chlorinated hydrocarbon, petroleum-based fuel oil, lubricating oil, hydraulic oil and some synthetic oil at room temperature and high temperature stability is good, which is not simple silicone rubber.

FVMQ O-ring has good low temperature performance, which is a great improvement for simple fluoroprene. Fluorosilicone rubber containing trifluoropropyl maintains an elastic temperature range of -50 ° C to +200 ° C, has poor high and low temperature resistance than vinyl silicone rubber, and will produce toxic gases when heated to more than 300 ° C. In terms of electrical insulation properties than vinyl silicone rubber is much worse. Adding appropriate amount of low viscosity hydroxy fluorosilicone oil to FVMQ compound, heat treating the compound, and adding a small amount of vinyl silicone rubber can significantly improve the process performance, which is conducive to solving the problems of adhesive roll and serious storage structure of the compound, and can extend the effective service life of the compound. When methyl phenyl silicoxy chain is introduced into the fluorine silicone rubber, it will help to improve the low temperature resistance and the processing performance is good.

Performance of FVMQ O-ring

1. Oil, solvent and chemical resistance

Compared with silicone rubber, fluorine silicone rubber has excellent oil resistance, solvent resistance and chemical resistance. Compared with fluorine rubber, oil resistance and solvent resistance are also good.

2. Heat resistance

The high-temperature decomposition of fluorine silicone rubber is the same as that of silicone rubber, that is, side chain oxidation, main chain fracture, side chain thermal decomposition and causing various composite reactions.

3. Cold tolerance

Fluorosilicone rubber, like ordinary silicone rubber, has good low temperature performance, and the brittle temperature is as low as -89 ° C, while the general fluororubber is about -30 ° C.

4. Electrical performance, radiation resistance

The electrical properties of fluorosilicone rubber are similar to those of ordinary silicone rubber, but the special value is that the changes under harsh conditions such as high temperature, low temperature, humidity, oil, solvents, chemicals, and ozone are very small. The radiation resistance of fluorosilicone rubber is not outstanding, but the radiation aging resistance is better than that of methyl vinyl silicone rubber.

5. Physical and mechanical properties

Like ordinary silicone rubber, the mechanical strength (especially tearing strength) of vulcanized rubber is relatively low.

6. Other features

Fluorine silicone rubber weather resistance, ozone resistance is very good, even after 5 years of exposure, still has good performance. In addition, fluorine silicone rubber mildew resistance, physiological inertia, anticoagulation is also very good.

Other uses of fluorosilicone rubber

Fluorosilicone rubber is a kind of special synthetic rubber. It has the characteristics of high temperature resistance of silicone rubber and corrosion resistance and oil resistance of fluorine rubber. It is suitable for aircraft fuel tank sealing material, engine accessories, fuel oil hose, oil pressure system sealing ring, pump diaphragm, etc., and all kinds of high and low temperature resistance, oil resistance, chemical resistance diaphragm, fluorine silicone rubber gasket, fluorine silicone rubber O-ring, pipe, sealing ring, etc.