▎ 摘　　要

NOVELTY - Ultra-thin dry powder steel structure fireproof coating comprises 30 pts. wt. white cement, 5-10 pts. wt. diatomaceous earth, 5-10 pts. wt. calcined kaolin, 3-18 pts. wt. hydrophilic silica, 2-10 pts. wt. polyoxyethylene polyoxy-propanol amine ether, 2-10 pts. wt. polymer modified graphene oxide, 2-10 pts. wt. sulfonated polybenzimidazole modified mesoporous silica, 3-10 pts. wt. KH-560 and 0-0.8 pts. wt. aeolian sand. USE - Used as ultra-thin dry powder steel structure fireproof coating (claimed). ADVANTAGE - The ultra-thin dry powder steel structure fireproof coating has excellent fireproof performance, strong adhesion, excellent wear resistance and weather resistance, water resistance, and good radiation resistance; and is environmentally friendly. DETAILED DESCRIPTION - Ultra-thin dry powder steel structure fireproof coating comprises 30 pts. wt. white cement, 5-10 pts. wt. diatomaceous earth, 5-10 pts. wt. calcined kaolin, 3-18 pts. wt. hydrophilic silica, 2-10 pts. wt. . polyoxyethylene polyoxy-propanol amine ether, 2-10 pts. wt. polymer modified graphene oxide, 2-10 pts. wt. sulfonated polybenzimidazole modified mesoporous silica, 3-10 pts. wt. KH-560 and 0-0.8 pts. wt. aeolian sand, polymer modified graphene oxide is prepared by (i) adding then adding 10 mmol 3,3'-diaminobenzidine, 1 mmol 1,4,5,8-naphthalene tetracarboxylic anhydride, 22 mmol benzoic acid, 3 ml isoquinoline and 40 ml m-cresol into 100 ml dry three-necked flask, magnetic stirring under nitrogen gas atmosphere for 2 hours, reacting 85 degrees C for 6 hours, then reacting 190 degrees C for 21 hours, and cooling to 70 degrees C and pouring into 150 ml methanol to obtain solid precipitate, washing the product with methanol, suction filtering, and drying at 160 degrees C for 20 hours in oven to obtain 1,4,5,8-naphthalene tetracarboxylic anhydride-terminated polypyrrole prepolymer, (ii) adding 1.6 mmol 2,2'-bis (4-sulfophenoxy) biphenylenediamine, 12.5 ml m-cresol and 0.8 ml triethylamine in 100 ml dry three-necked flask under nitrogen gas atmosphere, magnetic stirring, then adding 1.5 mmol 3,4,9,10-perylenetetracarboxylic anhydride, 3 mmol benzoic acid and 0.6 ml isoquinoline, stirring at room temperature for 1 hours, reacting at 80 degrees C for 4 hours, then raising the temperature to 180 degrees C for 20 hours, and cooling to room temperature to obtain amino-terminated sulfonated polyimide prepolymer, (iii) carrying out block copolymerization reaction of 1,4,5,8-naphthalene tetracarboxylic anhydride-terminated polypyrrole prepolymer obtained in step (i) and amino-terminated sulfonated polyimide prepolymer obtained in step (ii), stirring at room temperature for 1 hours under nitrogen gas atmosphere, heating to 180 degrees C for 20 hours, reacting, and cooling to 80 degrees C and pouring into 150 ml methanol to obtain large number of filamentous product, washing the product with methanol, suction filtering, and drying at 130 degrees C for 10 hours in vacuum oven to obtained amino-terminated block copolymer, and (iv) adding 3 g amino-terminated block copolymer obtained in step (iii) and 150 m dimethyl sulfoxide into 200 ml beaker, stirring at 80 degrees C, adding 5 g KH-560, then adding 10 g graphene oxide and heating to 80 degrees C and stirring for 2 hours, pouring the mixture into deionized water, filtering, and drying filter cake at 120 degrees C for 4 hours to obtain polymer-modified graphene oxide, and sulfonated polybenzimidazole modified mesoporous silica is prepared by dissolving 0.1 mol 3,3'-diaminobenzidine in 1000 g o polyphosphoric acid containing 86 wt% diphosphorus pentoxide, then adding 0.05 mol 5-aminoisophthalic acid and 0.04 mol 5-sulfoisophthalic acid into reaction solution, reacting at 210 degrees C for 15 hours, cooling to room temperature, precipitating into water, neutralizing with aqueous ammonia, filtering, and drying in vacuo at 120 degrees C to obtain amino-terminated sulfonated polybenzimidazole prepolymer, adding 100 ml deionized water and 1.5g KH-560 into 1000 ml flask equipped with stirrer, thermometer and condenser, then adding 20 g mesoporous silica MCM-41 with stirring, filtrating at room temperature for 30 minutes to obtain silane-modified mesoporous silica, adding .8 g amino-terminated sulfonated polybenzimidazole prepolymer and 150 ml dimethyl sulfoxide into 300 ml beaker, stirring at 75 degrees C for dissolution, then adding 15 g above obtained silane-modified mesoporous silicon, reacting at 80 degrees C and stirring and mixing for 3 hours, pouring into deionized water, filtering, and vacuum-drying the filter cake at 110 degrees C for 12 hours to obtain polybenzimidazole-modified mesoporous silica. An INDEPENDENT CLAIM is also included for preparation of ultra-thin dry powder steel structure fireproof coating comprising mixing 30 pts. wt. white cement, 5-10 pts. wt. diatomaceous earth, 5-10 pts. wt. calcined kaolin, 3-18 pts. wt. hydrophilic silica, 2-10 pts. wt. polyoxyethylene polyoxy-propanol amine ether, 2-10 pts. wt. polymer modified graphene oxide, 2-10 pts. wt. sulfonated polybenzimidazole modified mesoporous silica, 3-10 pts. wt. KH-560 and 0-0.8 pts. wt. aeolian sand in a mixer for 10 minutes to obtain final product.