| 摘要 |
Disclosed is a base oil for cooling a device, which contains 30 mass% or more of at least one compound selected from an oleyl ester (an oleic acid ester and an oleyl alcohol ester) and an oleyl ether, wherein each of the oleyl ester and the oleyl ether has a terminal methyl group, a methylene group and an ether group in the total number of 23 or more in the main chain thereof, the total number of methyl branches and ethyl branches in the oleyl ester and the oleyl ether is 1 or less, and the kinematic viscosity of the base oil is 4 to 30 mm2/s or less at 40°C. A device-cooling oil containing the base oil has excellent electrical insulation properties and excellent heat conductivity and is therefore suitable for cooling a motor, a battery, an inverter, an engine, an electric cell or the like in an electric-powered car or a hybrid car. |
