| abstract |
(57) [Summary] [Purpose] 1,1,1,2-tetrafluoroethane (R -134a) and other CFC-based alternative refrigerants have been developed, and a lubricating oil for refrigerators with excellent wear resistance, electrical insulation, hydrolytic stability, non-water absorption properties, and especially oil return has been developed. To do. A lubricating oil for a refrigerator using 1,1,1,2-tetrafluoroethane or 1,1,2,2-tetrafluoroethane as a refrigerant, which is a base oil comprising a hydrocarbon compound and a fluidity improver. It is a lubricating oil for a tetrafluoroethane refrigerant refrigerator containing as a main component. |