The organicity phosphorus series flame retardant and its production manner

摘要

The present invention relates to an organic phosphorus-based flame retardant and a process for producing the same, and more particularly, relates to a commercial process for producing an organic phosphorus-based flame retardant comprising: a step of reacting bisphenol A with formaldehyde, a step of extracting reaction products by putting the reactants into organic solvent, and a step of condensation-polymerizing the reaction products by adding phosphine-based or phosphite-based compounds.