abstract |
The present invention contains a lubricating base oil and a polymer having a structural unit represented by the following formula (I) of 40% by mass or less based on the total amount of refrigerating machine oil and having a weight average molecular weight of 500 to 100,000. Provide refrigerating machine oil. [In the formula (I), Ra, Rb and Rc each independently represents a hydrogen atom or a hydrocarbon group, and Rd represents an oxygen-containing organic group or a hydrocarbon group having 1 to 18 carbon atoms. ] |