| abstract |
(57) Abstract: [configuration] Lubricating oil compositions of the present invention, the lubricating base oil of the viscosity range 10mm 2 / s ~500mm 2 / s at 40 ° C., the following formulas (1) to ( It is characterized in that at least one phosphorus-based additive of 3) is added. [Chemical 1] (In the formula, R 1 and R 2 may be an alkyl group, R 3 may be an alkyl group, an aralkyl group, an aryl group, or a hydroxyalkyl group, each of which may have a substituent, and n is an integer of 0 to 2. [Effect] The lubricating oil composition of the present invention exhibits excellent wear resistance, and particularly has excellent wear resistance to an aluminum material, and also has excellent wear resistance under oxygen-free conditions. It is suitable as a refrigerating machine oil composition or a gear oil used as a refrigerant. |