| 摘要 |
PURPOSE:To obtain the subject hydraulic oil excellent in viscosity temperature characteristics from high temperatures to low ones, flammability, evaporation loss, shear stability, etc., by mixing a silicone-based hydraulic oil with an ester- based one. CONSTITUTION:An objective hydraulic oil with 3.0-10cSt (especially preferably 5.0-7.0cSt) viscosity at 100 deg.C and <=500mpas (especially preferably <=300mpas) low temperature fluidity at -30 deg.C by mixing (A) a silicone-based hydraulic fluid (preferable example; dimethylpolysiloxane) consisting of an organosilane, organosiloxane or organopolysiloxane with (B) an ester-based hydraulic fluid consisting of a diester-, monoester- or polyol ester-based one. |
