Flame Retardant Mechanism of Antimony Trioxide Combined with Halogen Compounds

Antimony trioxide cannot be used as a flame retardant alone, but can be particularly effective when combined with appropriate halogen compounds

Flame retardant performance.

At present, there are at least two theories explaining the flame retardant mechanism of antimony trioxide. Among them, a halogen compound undergoes thermal decomposition,

Release hydrogen halide and halogen elements, which react with antimony trioxide to produce antimony trihalide and antimony oxyhalide. Polymers and trihalides

Antimony will undergo a reaction to produce carbon instead of volatile flammable gases, which can act as an adiabatic shield,

Protecting grassroots polymers from further thermal decomposition, thereby further reducing the generation of combustible gases. Meanwhile, the flame retardant

The system can also form an inert gas, reducing the supply of oxygen required for combustion, thereby suppressing combustion. Another theory is

It is believed that antimony trichloride gas evaporates into the flame and decomposes into various antimony compounds and halogen radicals. These decomposition products

Materials can consume flame energy, alter the chemical process of combustion, and thus have an inhibitory effect. Antimony containing compounds play a role in consumption

The combustion energy, while halogen radicals play a role in changing the combustion chemical process.