The flame retardant properties of fluorosilicone oil mainly come from its unique fluorosilicone molecular structure and high temperature resistance, which enables it to remain stable in high temperature environments and effectively inhibit the spread of flames. Combined with its chemical corrosion resistance and electrical insulation, it has important safety application value in aerospace, industrial sealing, electronic packaging and other fields. The details are as follows:

I. Flame retardant properties and mechanisms
‌High temperature stability‌
The fluorosilicone oil molecule contains silicon-oxygen bonds (bond energy up to 452 kJ/mol) and highly polar carbon-fluorine bonds, which make it stable in the range of -50℃ to 250℃‌ and not easy to decompose and produce flammable gases at high temperatures.
‌Low surface energy and carbonization effect‌
Its surface energy is as low as 20 mN/m, which can reduce the flammability of the material surface; during combustion, the fluorine-containing group promotes the formation of a ceramic carbon layer to block oxygen and heat transfer.
‌Synergistic flame retardant design‌
By adding fillers such as platinum catalysts, mica or kaolin, the density of the ceramic layer can be enhanced and the flame retardant efficiency can be improved (such as delaying the propagation of thermal runaway for >30 minutes.

II. Safety application areas
(I) Aerospace
‌Sealing components‌: used in key parts such as rocket propellant tanks, missile warheads, and fuel tank pressure regulating pipeline diaphragms, and can withstand fuel erosion and extreme temperatures (-50℃~250℃).
‌Lubrication system‌: As a high-temperature bearing lubricant, it does not decompose at a high speed of 1.4 million revolutions per minute, ensuring engine reliability.
(II) Industrial protection
‌Oil-resistant seals‌
Manufacture fuel oil hoses, oil-resistant pipes and chemical equipment seals to resist mineral oil and solvent erosion and prevent leakage.
‌Fireproof coating‌
Used for surface treatment of high-temperature equipment, the flame retardant layer is enhanced by ceramic fillers (such as wollastonite) to block oxygen penetration.
(III) Electronics and electrical
‌Potting protection‌: used for integrated circuit and sensor packaging to provide insulation (volume resistivity>10¹⁵ Ω·cm), weather resistance and flame retardant protection to reduce the risk of thermal runaway.
‌Heat dissipation material‌: Fluorosilicone potting glue with thermal conductive fillers such as alumina, taking into account both heat dissipation and flame retardant requirements.