| 摘要 |
PURPOSE:To obtain the title lubricating oil having sufficient viscosity, high viscosity index and excellent lubricating properties and compatibility with fluorocarbon, contributing to stabilization of fluorocarbon, containing an ester compound having a specific viscosity, an olefin oligomer having a specific viscosity and a modified silicone oil having a specific viscosity. CONSTITUTION:The aimed lubricating oil containing (A) an ester compound having 1-50cst kinematic viscosity at 100 deg.C, (B) an olefin oligomer having 1-50cst kinematic viscosity at 100 deg.C and (C) a modified silicone oil having 5-500cst kinematic viscosity at 100 deg.C prepared by replacing partially or wholly methyl group of dimethylpolysiloxane with one or more of -R1, -R2OH, -R2OR3, group shown by formula I and group shown by formula II (R1 is alkyl, (alkyl)aryl or aralkyl; R2 is alkylene, (alkyl)arylene or aralkylene; R3 is H, alkyl, alkenyl, (alkyl)aryl or aralkyl) in a blending ratio of the component A/B of 99/1-30/70 by weight and in a blending ratio of the component A+B/C of 98/2-30/70 by weight. |
