Almost all inorganic flame retardant additives will improve the flame retardant properties of composite materials; while organic flame retardant additives have only a small part of the flame retardant function, most of them not only do not, but will help combustion. Commonly used varieties are antimony trioxide, which must be used in combination 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 resin.
Inorganic phosphorus-based flame retardant additives are commonly used in red phosphorus and sulfate. Pure red phosphorus is finally micronized before use, and can be used alone or in combination. Phosphates include ammonium phosphate and ammonium nitrate. Boron-based flame retardant materials are commonly used hydrated zinc borate, which is generally used in combination with other flame retardant materials. Other metal compounds, such as metal aluminides, metal irons, etc., are mainly used for soot.
The organic halide is mainly bromide, and commonly used are decabromobiphenyl acid, tetrabromobisphenol A, brominated polystyrene and the like. Chloride is only used in the case of chlorinated paraffin and chlorinated polyethylene, and halides are often used in combination with antimony trioxide or phosphide. Organic phosphides can be classified into inorganic phosphorus and halogenated phosphorus. Halogen-free phosphorus is mainly phosphoric acid such as triphenyl. Halogen-free phosphorus needs to be added in synergy with phosphorus halide. The halogenated phosphorus contains both phosphorus and halogen in the molecule, and has intramolecular synergistic effects, so it can be used alone, and commonly used varieties such as trichloroethylene (TECP).www.china-zhufengchem.com