What kinds of common flame retardants are there?

1. Chlorine flame retardant Recently, the chlorine-based flame retardant has partially replaced the bromine-based flame retardant, and the consumption of chlorine-based flame retardant has decreased. 2. Bromine flame retardant 3, phosphorus flame retardant degree Phosphorus flame retardants include inorganic phosphorus flame retardants and organic phosphorus flame retardants. 4. Nitrogen flame retardant Commonly used varieties include melamine, melamine cyanurate (MCA), etc. Synergistic agents are often added to PA, PU, PO, PET, PS, PVC and other resins. Nitrogen/phosphorus is the most commonly used synergistic flame retardant system. 5. intumescent flame retardant agent 6, inorganic hydroxide flame retardant Flame retardant, a functional additive that endows flammable polymers with flame retardancy, is mainly designed for flame retardancy of polymer materials. There are many types of flame retardants, which can be divided into additive flame retardants and reactive flame retardants according to their application methods. The additive flame retardant is added to the polymer by mechanical mixing method to make the polymer flame retardant. At present, the additive flame retardant mainly includes organic flame retardant and inorganic flame retardant, halogen flame retardant (organic chloride and organic bromide) and non-halogen. Organic flame retardants are represented by bromine, phosphorus and nitrogen, nitrogen, red phosphorus and compounds. Inorganic flame retardants are mainly antimony trioxide and magnesium hydroxide.