| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a refrigerator oil which has proper compatibility and solubility with a refrigerant 2,3,3,3-tetrafluoro-1-propene, can maintain viscosity without impairing lubricity, can reduce the filling amount of a refrigerant and has excellent stability or lubricity or the like.SOLUTION: There is provided a refrigerator oil for a refrigerant 2,3,3,3-tetrafluoro-1-propene which is composed mainly of an ester of at least one selected from neopentyl glycol, trimethylolpropane, pentaerythritol or dipentaerythritol with one or more selected from monovalent fatty acids having 7 to 9 carbon atoms and has a kinematic viscosity at 40°C of 5 to 300 mm/s, an iodine value of 10 gI/100 or less and a total acid value of 0.1 mgKOH/g or less.</p> |
