| 摘要 |
PURPOSE:To improve storability, wearing characteristics, low-temperature frictional properties and the like of a lubricating oil by adding a phosphorous ester, a phosphoric ester amine, a boron-containing dispersant for cleaning and a metal-deactivating agent to a base oil comprising a mineral oil and/or a synthetic oil. CONSTITUTION:A lubricating oil composition for buffer is prepared by adding 0.1 to 1.0wt.% of phosphorous ester having a 14 to 20C hydrocarbon group such as dioleyl phosphite, 0.1 to 1.0wt.% of a phosphoric ester amine having an 8 to 20C hydrocarbon group such as oleyl acid phosphate amine salt, 0.1 to 1.0wt.% of boron-containing dispersant for cleaning such as boron-containing succinamide, 0.01 to 0.3wt.% of a metal-deactivating agent such as benzotriazole and, optionally, additives such as viscosity index improver and antioxidant to a base oil comprising mineral oil and/or synthetic oil and having a viscosity of 1.5 to 3.0cSt at 100 deg.C. |
