Flame retardants, functional additives that give flame-retardant properties to flammable polymers, are mainly designed for flame retardancy of polymer materials; there are various types of flame retardants, which are divided into additive flame retardants and reactive flame retardants according to the usage method.

Flame retardants are mainly used in the fields of transportation, electrical and electronic equipment, furniture and construction materials. The addition of flame retardants does not allow the material to obtain the ability to completely resist fire, but it can still reduce the occurrence of fire, and for the people caught in the fire to win valuable escape time.