| abstract |
A lubricating oil composition for a refrigerator using therein 1,1,1,2-tetrafluoroethane as the refrigerant, comprising as the base oil a polyoxyalkylene glycol monoether of the following general formula nR₁ O R₂ O H nwherein R₁ is an alkyl group having 1-18 carbon atoms, m is an integer of 5-70, R₂ is an alkylene group having 2-4 carbon atoms and a ratio of 0-0.8 between (the number of - OR₂ - group wherein R₂ is ethylene group)/m in the molecule, the polyoxyalkylene glycol monoether having a specified pour point and a specified kinematic viscosity. In one embodiment, the lubricating oil composition may further comprise a specified phosphate and at least one kind of a specified epoxy compound to further improve the oil composition in properties. |