| abstract |
A lubricant composition (for a refrigerating machinenemploying a HFC type refrigerant containing at least onenselected from the group consisting of HFC-32, HFC-125, andnHFC-134a) comprises a base oil of an ester formednfrom a dihydric or higher polyol as an alcohol and anmonobasic aliphatic acid, alone or as a mixture thereof;nand additives of, based on the total amount, (1) not lessnthan 0.01 vol% and less than 1.0 vol% of a phosphate, (2)nfrom 0.01 to 1.0 vol% of at least one of annalkylphosphorothionate and an arylphosphorothionate, andn(3) from 0.01 to 1.0 vol% of an epoxy compound. |