What kinds of common flame retardants are there

1. Chlorine flame retardant Recently, chlorine-based flame retardants have been partially replaced by bromine-based flame retardants, and the consumption of chlorine-based flame retardants has decreased. 2. Bromine flame retardant 3. Phosphorus flame retardant Phosphorus flame retardants include inorganic phosphorus flame retardants and organic phosphorus flame retardants. 4. Nitrogen flame retardant Commonly used varieties are melamine, melamine cyanurate (MCA), etc., and it is often necessary to add synergists for resins such as PA, PU, PO, PET, PS and PVC. Nitrogen/phosphorus is the most commonly used synergistic flame retardant system. 5. Intumescent flame retardant 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 use methods. The additive flame retardant is added to the polymer by mechanical mixing method, which makes 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 series, phosphorus-nitrogen series, nitrogen series, red phosphorus and compounds, while inorganic flame retardants are mainly antimony trioxide, magnesium hydroxide, aluminum hydroxide and silicon series. Reactive flame retardant is used as a monomer to participate in polymerization reaction, so the polymer itself contains flame retardant components, which has the advantages of less influence on the performance of polymer materials and lasting flame retardancy.