▎ 摘　　要

NOVELTY - Acrylamide-modified graphene intermediate material is added to dimethylformamide solvent. Polycarbonate diol is added, and nitrogen is supplied, reacted and heated. 13-23 pts. wt. Isophorone diisocyanate and dibutyltin dilaurate catalyst are added to mixture and reacted. 3-5 pts. wt. Dimethylolbutanoic acid is added, reacted and cooled. 1-3 pts. wt. Trimethylolpropane is added to mixture, and reacted. 2-4 pts. wt. Triethylamine salt and water are added, and the mixture is dispersed and cooled, to obtain graphene-based conductive-retardant aqueous polyurethane coating. USE - Preparation of graphene-based conductive-retardant aqueous polyurethane emulsion (claimed). ADVANTAGE - The method enables preparation of graphene-based conductive-retardant aqueous polyurethane emulsion having excellent adhesiveness of polyurethane emulsion dispersion and polyurethane matrix. DETAILED DESCRIPTION - 0.01-0.02 g Graphene sheet is added to 100 mL protonic acid, mixed and reacted at 50-70 degrees C, ultrasonic-cleaned at ultrasonic power of 200 W and ultrasonic frequency 40 KHz for 1-5 hours. Ultrasonic-processed material is diluted with 250-350 mL deionized water, filtered using microporous membrane having diameter of 0.2 mu m, washed with deionized water, dried at 80 degrees C for 12 hours and ground, to obtain fine powder. The obtained fine powder is processed, to obtain carboxylated graphene nanosheet. 4-30 pts. wt. Carboxylated graphene nanosheet is added to 50-l50 mL dimethylformamide as solvent and mixed. 30-250 pts. wt. Acrylamide, 10-30 pts. wt. stabilizer and predetermined amount of dispersing agent are added, and ultrasonically-dispersed at power of 200 W and frequency of 40 KHz for 1-60 minutes. The mixture is placed in water bath at 60-80 degrees C for 48-72 hours. 25-50 mL Dimethylformamide solvent and 25-50 mL deionized water are added to mixture, filtered and dried at 105 degrees C for 12 hours under vacuum, to obtain acrylamide-modified graphene intermediate material. 0.01-0.05 pt. wt. Acrylamide-modified graphene intermediate material is added to 20 mL dimethylformamide solvent and ultrasonic-dispersed at power of 200 W and frequency of 40 KHz for 10 minutes, and provided to reaction vessel equipped with nitrogen tube, condenser and stirring apparatus. 30-50 pts. wt. Polycarbonate diol is added, and nitrogen is supplied, reacted at 50 degrees C for 1 minute and heated at 65-85 degrees C. 13-23 pts. wt. Isophorone diisocyanate having isocyanate group content of 6.4% and 0.02-0.08 pt. wt. dibutyltin dilaurate catalyst are added to mixture and reacted. 3-5 pts. wt. Dimethylolbutanoic acid as hydrophilic chain extender is added, reacted for 1 hour and cooled to 60 degrees C. 1-3 pts. wt. Trimethylolpropane as crosslinking agent is added to mixture, and reacted for 1 hour. 2-4 pts. wt. Triethylamine salt and water are added, and the pH is adjusted to 7, and the mixture is dispersed. The mixture is cooled, to obtain graphene-based conductive-retardant aqueous polyurethane coating.