Flame retardants, functional additives that endowing flammable polymers with flammability, are mainly designed for the flame retardant of polymer materials; There are many types of flame retardants, which are divided into additive flame retardants and reactive flame retardants according to the method of use.

Additive flame retardants are added to the polymer by mechanical mixing method, so that the polymer has flame retardant, the current additive flame retardants are mainly organic flame retardants and inorganic flame retardants, halogen flame retardants (organic chloride and organic bromide) and non-halogen. Organic is bromine, phosphorus nitrogen, nitrogen and red phosphorus and compounds represented by some flame retardants, inorganic is mainly antimony trioxide, magnesium hydroxide, aluminum hydroxide, silicon system and other flame retardant systems.

Reactive flame retardant is as a monomer to participate in the polymerization reaction, so that the polymer itself contains flame retardant components, its advantages are less impact on the performance of polymer materials, flame retardant durability.