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Classification of plastics flame retardant additives

2013-08-01 by seoer8

plastic additive 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 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 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 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.


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