Nearly all inorganic additives in the process of using flame retardant synergist will improve the flame retardant properties of the composite materials; while only a small part of the organic additives have flame retardant functions, most of them will not only have no, but will help combustion. Common varieties are as follows:
1 antimony trioxide. Must be used in conjunction with organic flame retardant materials.
2 magnesium hydroxide, aluminum hydroxide. They can be used separately, but they are added in large amounts, which are often equivalent to the amount of resin used.
3 inorganic phosphorus. Commonly used red phosphorus and sulfate, pure red phosphorus is finally micronized before use, can be used alone and in combination, phosphate is ammonium phosphate, ammonium nitrate and the like.
4 boron flame retardant materials. Commonly used hydrated zinc borate, generally used in conjunction with other flame retardant materials.
Other metal compounds, such as metal aluminides, metal irons, etc., are mainly used for soot.
5 metal halides. Such as various types of halogenated guanidines.
The flame retardant synergist is mainly a bromide when it is used, and commonly used are decabromobiphenyl acid (DBDPO), tetrabromobisphenol A (TBBPA), brominated polystyrene (BPS) and the like. Chloride is only available in chlorinated paraffin and chlorinated polyethylene. Halides are often used in conjunction with antimony trioxide or phosphide.