| 摘要 |
PROBLEM TO BE SOLVED: To provide a working fluid composition for a refrigerating machine with good compatibility and stability with an unsaturated fluorohydrocarbon refrigerant.SOLUTION: This composition comprises polyalkylene glycol represented by formula (1) and the unsaturated fluorohydrocarbon refrigerant: R-(OR)-OR(1), wherein Rand R, which may be the same or different, each represent hydrogen, an alkyl group, an acyl group, an aromatic group, an alicyclic hydrocarbon group or a group having a heterocyclic hydrocarbon group containing an oxygen atom; at least one of Rand Ris a group having a heterocyclic hydrocarbon group containing an oxygen atom; Rrepresents a 2-4C alkylene group; and n represents the repetition number of an oxyalkylene group represented by OR. |
