fire retardant classification

Flame retardants can be classified according to their use additive flame

retardant and reactive flame retardant. Flame retardant additives usually

added to the Glycrin monostearate  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  titanium dioxide anatase 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  pvc additive material suitable halogen flame retardant to achieve the

purpose, and to avoid secondary damage caused containing halogens.