Classification and different characteristics of flame retardant additives
Almost all inorganic flame retardant additives can improve the flame retardancy of composites. Currently, there are several different common varieties, such as antimony trioxide, which must be used in conjunction with organic flame retardant materials. Magnesium hydroxide and aluminum hydroxide can be used separately, but the amount added is often equivalent to the amount of the resin.
Commonly used flame retardant additives also include inorganic phosphorus, such as red phosphorus and sulfate. It should be noted that pure red phosphorus is finally micronized before use, and can be used alone or in combination. Phosphate has ammonium phosphate, ammonium nitrate, etc. . Commonly used in boron flame retardant materials is hydrated zinc borate, which is generally used in combination with other flame retardant materials. Some other metal compounds also have flame retardant effects, such as metal aluminides, metal irons, etc., mainly used for smoke.
In addition, metal halides are also commonly used flame retardant additives, including several different types: 1, organic halides, mainly bromide; 2, organic phosphides, can be divided into inorganic phosphorus and halogenated phosphorus; Nitrogen system, the main variety is triazolam, etc., is commonly used in PA and PU, and is used in combination with phosphorus flame retardants.http://www.china-zhufengchem.com/