FLAME RETARDANT CELLULOSE FIBER STRUCTURE AND PROCESS FOR PREPARATION THEREOF

PURPOSE: Provided is a process for preparing a cellulose fiber structure by impregnating a cellulose fiber structure with an aqueous solution of a phosphorous compound and a nitrogen compound, heat treating in a nitrogen atmosphere, converting the obtained cellulose ammonium phosphate ester compound to a cellulose sodium phosphate ester compound by ion exchange and coupling a refractory metal is provided. Thereby the obtained fiber structure can be used for fire retardant material, insulating material and high temperature filter material. CONSTITUTION: This process comprises the steps of: forming a cellulose ammonium phosphate ester compound by impregnating a cellulose fiber structure containing cellulose fiber with an aqueous solution of a phosphorous compound and a nitrogen compound and reacting at 200 to 400deg.C in a nitrogen atmosphere; forming a cellulose sodium phosphate ester compound by ion exchange of the formed compound in a sodium hydroxide solution; coupling with a metal ion by impregnating the formed cellulose sodium phosphate ester compound with an alcohol solution of refractory metal chloride.