HYDRAULIC FLUID COMPOSITION OF LIQUID PRESSURE BRAKE FOR AUTOMOBILE

摘要

PURPOSE:To obtain the subject composition having excellent corrosion resistance in a break system and suppressing the generation of precipitation by adding a specific amount of a specific nitrogen-containing compound as a precipitation inhibitor to a non-mineral-based hydraulic fluid. CONSTITUTION:A nitrogen-containing compound as a precipitation inhibitor expressed by formula I and/or formula II [R1 and R2 are H or phenol; (n) is 0 or integer of 1-3 (preferably 0); (m) is 0 or integer of 1-4 (preferably 3)] is added to a non-mineral-based hydraulic fluid in an amount of >=0.005 wt.% (preferably 0.01-0.1 wt.%) to afford the objective composition.