Facile Fabrication of organic zirconium/inorganic phosphorus complex for super-efficiently flame-retardant epoxy resin

To obtain the super-efficiently flame retardants containing metal elements for epoxy resin, a novel facile constructing strategy is obtained through in-situ coprecipitation reaction, then the resultant organic zirconium/inorganic phosphorus complex ([email protected]) is used alone to flame retard epoxy resin (EP). Notably, the resulted EP merely with 3 wt% [email protected] displays the UL-94 V0 level and strong suppression on the heat release and smoke production. Besides excellent catalytic charring of [email protected]/EP, more gaseous noncombustible substances, such as aromatic compounds, etc. are generated during combustion comparing with [email protected] (APP modified by zirconium chloride). Consequently, the excellent synergistic action between catalytic charring and gaseous dilution results in the satisfactory fire safety of EPs.