Patent ID: 7211318

Claim:
An incombustible composition for a fire door/wall, comprising 30 to 80 wt % of organic or inorganic fiber, of which 55 wt % is rock wools, 5 to 50 wt % of fly ash or bottom ash, of which 12 to 17 wt % is fly ash or synthetic silica, 5 to 50 wt % of fire-proofing agent, of which 8 wt % is calcium carbonate, 1 to 15 wt % of curing fire-retardant resin, of which 3 to 10 wt % is a phenol resin and 1 to 20 wt % of incombustible hollow filler, wherein the incombustible hollow filler comprises 10 wt % of fly ash balloon and 2 wt % of perlite.