| abstract |
The present invention provides a refrigerating machine oil containing a lubricating base oil and a polymer having a structural unit represented by the following formula (I) and having a weight average molecular weight of 500 to 100000, in an amount of 40 mass % or less based on the total amount of the refrigerating machine oil. [In formula (I), R a , R b and R c each independently represent a hydrogen atom or a hydrocarbon group, and R d represents an oxygen-containing organic group or a hydrocarbon group having 1 to 18 carbon atoms.] |