▎ 摘　　要

NOVELTY - Highly flame-retardant waterborne polyurethane coating comprises 5-26 pts. wt. lanthanum-metal organic framework supported graphene, 18-22 pts. wt. 1,5-naphthalene diisocyanate, 26-31 pts. wt. 1,4-butanediol adipate diol, 20-25 pts. wt. polyether polyol, 6-10 pts. wt. hydrophilic chain extender, 4-7 pts. wt. 2,2-dimethylolpropionic acid and 0.2-0.5 pts. wt. catalyst. USE - Used as highly flame-retardant waterborne polyurethane coating. ADVANTAGE - The coating: has high thermal conductivity and stability; and can provide catalytic performance for catalyzing oxidation and promoting the carbon-forming reaction, form a dense graphitized carbon layer, dilute the concentration of surrounding oxygen, inhibit the combustion process, and produce the waterborne polyurethane material with excellent flame resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing a highly flame-retardant waterborne polyurethane coating, comprising (i) adding 5-22 pts. wt. lanthanum-metal organic framework supported graphene, 18-22 pts. wt. 1,5-diisocyanate naphthalene, 26-31 pts. wt. poly 1,4-butylene adipate diol and 20- 25 pts. wt. polyether polyol into reaction flask; (ii) placing the reaction flask in a regulated oil bath, heating to 80-90 degrees C, stirring at a constant speed for 3-5 hours, cooling to 55-65 degrees C, adding 6-10 pts. wt. hydrophilic chain extender and 4-7 pts. wt. 2,2-dimethylolpropionic acid, stirring well and adding acetone solvent to control the solid-liquid ratio to 35-45%; (iii) heating to 75-85 degrees C, stirring the reaction at a constant speed for 1-3 hours, adding 0.2-0.5 pts. wt. catalyst dibutyltin dilaurate, stirring to react at a constant speed for 3-8 hours, cooling the solution to room temperature and adding triethylamine to adjust the pH of the solution to neutral.