... APP) is an excellent, high-efficiency and nontoxic inorganic flame retardant, used as the necessary flame-proof additive for all ... )<50µm>95Property : 1. High content of phosphorus, nitrogen, good flame retardant effect.2. High polymerization degree, low water-solubility and ... as the main flameproof additive for expanding-type flame retardant used in plastic, resin, rubber, etc.4. make into powder ...