| abstract |
(57) Abstract: (a) phosphorus compound, (b) benzotriazole derivative, (c) saturated aliphatic polyhydric alcohol having 2 to 6 carbon atoms and 2 to 6 carbon atoms, and 2 to 10 carbon atoms. A composition for a working fluid of a refrigerator, which comprises an ester used as a base oil obtained from the linear or branched saturated aliphatic monocarboxylic acid or a derivative thereof, and (d) hydrofluorocarbon. [Effects] The present invention makes it possible to provide a composition for a working fluid of a refrigerator, which is excellent in lubricity and wear resistance even when an ester having a specific structure with high polarity is used as a base oil. . |