The Use Of Fluorosilicone Rubber
The main properties and applications of fluororubber From the perspective of the main chain structure, fluororubber can be divided into three basic types: fluorocarbon rubber, fluorosilicone rubber, and fluorinated phosphazene rubber. Among them, fluorocarbon rubber is the main one, and vinylidene fluoride and chlorotrifluoroethylene copolymer (1# rubber), vinylidene fluoride and hexafluoropropylene copolymer (2# rubber), vinylidene fluoride and hexafluoropropylene and four Vinyl fluoride ternary copolymerization (3# glue) is the main one.
(1) 1# fluorine rubber has good physical and mechanical properties and chemical stability, and can be used under 200°C for a long time, and under 250°C for short-term use; the brittle point is -20°C~-40°C; excellent medium resistance , excellent stability to organic solvents, inorganic acids and oxidants, especially excellent acid resistance; excellent weather resistance and ozone resistance performance, after being exposed to the atmosphere for several years, the physical and mechanical properties change little, and the effect on microorganisms Also more stable. 1# fluorine rubber is currently only produced by Chenguang Institute in China. Mainly used in the preparation of heat-resistant, oil-resistant, acid-resistant rubber products. Such as seals, rubber hoses, rubber pads, tapes, tapes, films, fuel tanks and impregnated products, etc. can also be used as outer sheaths for wires and anti-corrosion linings for equipment, etc., widely used in aviation industry, petroleum industry, automobile industry, chemical industry and other fields.
(2) 2# fluorine rubber 2# fluorine rubber is the most used fluorine rubber variety. It has good storage stability, electrical insulation and radiation resistance; excellent oil resistance and medium resistance; excellent vacuum performance, which can meet the needs of special occasions; good heat resistance, usually can be used for a long time at 250 ° C, Short-term use at 300°C.
Type 26 fluororubber 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 fluororubbers, 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 cement single chamber pump, and the service life of the sealing ring made of natural rubber is about 10 times longer.
(3) 3# fluorine rubber has outstanding high temperature resistance, oil resistance, especially resistance to diester oil, chemical resistance and good physical and mechanical properties, satisfactory dielectric properties, non-combustibility, weather resistance and excellent vacuum performance , 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 the same as 2# glue is similar. 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 materials, made of pipes, used to transport or organic solvents or other corrosive media, etc.
