What are the main flame retardants currently available?

Flame retardants, functional auxiliaries that give inflammable polymers inflammability, are designed mainly for the flame retardation of polymer materials; There are many types of flame retardants, divided into additive flame retardants and reactive flame retardants according to the method of use. Additive flame retardants are added to polymers by mechanical mixing to make them flame retardants.
At present, the main added flame retardants are organic flame retardants and inorganic flame retardants, halogenated flame retardants (organic chloride and organic bromide) and non-halogenated flame retardants. Organic is bromine series, phosphorus nitrogen series, nitrogen series and red phosphorus and compounds represented by some flame retardants, inorganic is mainly antimony trioxide, magnesium hydroxide, aluminum hydroxide, silicon and other flame retardant system.
Here's a rough introduction:
★1. Antimony trioxide: high purity ≥ 99.8%, ultra-fine 0.4-1.1um, whiteness above 98 (added flame retardant synergist)
★2. Tri (2, 3-dibromopropyl) isotrimocyanate: TBC, total bromine content: ≥64.5%, melting point range: 100 ~ 110℃ (added non-toxic flame retardant)
★3. Melamine cyanuric acid: MCA, content: ≥ 99%, decomposition temperature: 440 ~ 450℃ (reaction type non-toxic flame retardant)
★4. Tribromophenol: TBP, content: ≥ 98.5%, melting point: ≥ 92 ℃ (reactive flame retardant)