The application of Silicone in Aerospace field
In the field of Aerospace, silicone is mainly used in aviation equipment, avionics and aviation brakes, etc., and has made positive contributions to the development of the aviation industry.
Silicone material has many excellent properties, it is a typical semi-inorganic semi-organic polymer material, both inorganic polymer and organic polymer material characteristics, so it has a unique high and low temperature resistance, oxygen resistance, light resistance and weathering resistance and other properties, in the aviation industry has been widely used.
High temperature (resistant to confined degradation) silicone sealants
At present, the silicone materials used in China's aviation industry include silicone rubber, silicone resin, silicone grease and silicone oil. The high temperature area of aircraft engine and rear fuselage and its environmental control system need high temperature silicone sealants with temperature resistance up to 300℃. The commonly used silicone sealants are high temperature silicone sealants, high strength and high hardness silicone sealants, and two-component silicone sealants. Among them, the temperature resistance of two-component silicone sealant can reach 350℃, and it has excellent anti-hermetic degradation performance, and it can have good adhesion performance to metal materials without coating adhesive primer.
Conductive silicone sealant
With the development of electronic technology, modern war has entered the era of information warfare and electronic warfare, anti-electromagnetic interference and communication security are very important for electronic equipment and weapons. The number of electronic systems and equipment of military aircraft is increasing, and the electronic systems and equipment are developing towards high frequency, wide band, high integration, high reliability and high precision. Electromagnetic interference will become more and more serious, and has become a prominent obstacle to the normal work of electronic systems and instruments. Therefore, the joints, pores and sealing gaps of the electronic equipment bay and the working cabin of the aircraft. Conductive silicone sealants must be used to achieve electromagnetic protection and sealing.
Flame retardant and fire retardant silicone sealant
Fireproof means that a material or component can withstand a flame at a temperature of 1 093 ° C or higher for at least 15 minutes without burning through, and no flame can be observed on its back. Flame retardant means that the material has the ability to self-extinguish after the ignition source is withdrawn, so that it can prevent combustion or delay the rapid expansion of combustion when the fire occurs.