| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricating oil composition for a refrigerating machine, excellent in stability to hydrolysis and oxidation, scarcely causing color development of a lubricating oil nor generating sludge when used for a long period, and suitable for the refrigerating machine for which a refrigerant free from chlorine, such as a hydrofluorocarbon, carbon dioxide or a hydrocarbon, is used. SOLUTION: This lubricating oil composition for the refrigerating machine for which the hydrofluorocarbon, the carbon dioxide or the hydrocarbon is used as the refrigerant is given by adding (A) at least one kind of compound which contains an alkyl glycidyl ether, alkyl glycidyl ester or cyclohexane oxide in its molecule in an amount of not less than 0.01 wt.% but less than 1 wt.% and (B) at least one kind of diphenylcarbodiimide and a bis(alkylated phenyl)carbodiimide compound in an amount of not less than 0.01 wt.% but less than 1 wt.% to an ester-based or ether-based synthetic lubricating base oil. |
