▎ 摘　　要

NOVELTY - Engine cooling liquid comprises 5-45 pts. wt. of 1,2-propanediol, 1-5 pts. wt. of sodium molybdate, 0.1-3 pts. wt. of sodium nitrate, 0.1-5 pts. wt. of sebacic acid, 1-5 pts. wt. of hydrolyzed polymaleic anhydride, 0.1-5 pts. wt. of antifoaming agent and 0.001-10 pts. wt. of modified graphene. USE - Engine cooling liquid. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing engine cooling liquid, which involves : (A) mixing 1,2-propanediol, sodium molybdate, sodium nitrate, sebacic acid and polymaleic anhydride to obtaun mixture; (B) adding antifoaming agent and modified graphene with obtained mixture with stirring ultrasonically for 5-10 minutes; and (C) filtering to obtain engine cooling liquid.