| abstract |
The present invention is a base oil having high safety and hydrolysis stability, having a good viscosity, and having a high viscosity as a lubricant additive, as compared with existing flame retardant lubricating base oils. It aims at providing the multifunctional lubricant composition which shows antiwear performance. In order to achieve the above object, 26 to 43 phosphorus compounds (B) having a specific structure defined in the specification are added to 100 parts by mass of phosphorus compounds (A) having a specific structure specified in the specification. Containing 0 to 1.3 parts by mass of a phosphorus compound (C) having a specific structure specified in the specification, 0 to 1.3 parts by mass in total of triphenyl phosphate and tricresyl phosphate, A functional lubricant composition is provided. |