The Preparation of a High-Performance Boric Ester Brake Fluid

Respectively with methanol and propylene oxide reaction for the synthesis of poly alcohol ether,then reaction with boric acid,obtained poly ether-methanol boric acid ester.The optimal conditions for poly ether-methanol boric acid ester were as follows: the quality ration of boric acid ester to poly ether-methanol 1∶26,reaction temperature 130 ℃,reaction time 3 hours,the yield of poly ether-propanol boric acid ester was 93%.The structure of the synthetic products was analyzed by IR.Except that,a high-performance boric acid ester brake fluid was prepared,using poly ether and boric acid ester as the main material and adding some addictives.Finally,the performance test results demonstrated that the brake fluid reached the American DOT-4 standard.