flame retardants some simple classification

Flame retardants can be classified according to their use additive flame retardant and reactive flame retardant . Flame retardant additives usually added to the manner in conjunction with the base resin , and the resin between them just a simple physical  PVC heat stabilizer for fittings mixture ; reactive flame retardant is generally a molecule containing reactive elements and group-containing monomer , such as a halogenated anhydrides , halogenated bisphenol- and phosphorus-containing polyols and the like , because of its reactivity, can be chemically bonded to the molecular chain of the resin , a plastic resin part , most reactive flame retardant additive type structure or synthetic monomer . Chemical composition according to the different flame retardants can be divided into inorganic and organic flame retardants . Inorganic flame retardants include aluminum hydroxide, magnesium hydroxide , antimony oxide , zinc borate , and red phosphorus , etc., halogenated organic flame mostly carbon black powder  organic bromides and organic chlorides, phosphates, halogenated phosphates , nitrogen phosphorus -based flame retardants and intumescent flame retardants. Smoke suppressant effect is to reduce the amount of flame-retardant materials and toxic smoke emission of harmful gases , mostly for molybdenum compounds, tin compounds and iron-based compounds. Although antimony trioxide and zinc borate also smoke suppression , but is often used as a flame retardant synergist and therefore classified as a flame retardant system .
Flame retardant properties of the vast majority of a hard plastic indicator , conventional flame retardant is used in halogen-containing flame retardant. Combustion of halogenated flame retardant materials produce a lot of smoke and toxic corrosive gases will cause epoxidized soybean oil  secondary damage. Common ingredients are phosphorus flame retardant formulations compound, a silicon -based flame retardant , nitrogen-based flame retardants and metal hydroxides , etc. Volatile combustion does not produce corrosive gases , pollution-free flame retardants are known . Flame retardant is added to phase in the material suitable halogen flame retardant to achieve the purpose , and to avoid secondary damage caused containing halogens .