| 摘要 |
<p>PURPOSE: Disclosed are refrigerating machine oil compositions which more excel in compatibility with a refrigerant having carbon dioxide as the major component, and refrigerating machine oil compositions which excel in stability and lubricity in an atmosphere of carbon dioxide in the supercritical state while retaining said compatibility and can be used over a long period of time. CONSTITUTION: Refrigerating machine oil compositions for refrigerants having carbon dioxide as the major component are obtained by compounding (A) a polyoxyalkylene glycol having a kinetic viscosity at 100°C of 3-50 mm2/s with (B) a polyvinyl ether having a kinematic viscosity at 100°C of 3-50 mm2/s. Refrigerating machine oil compositions for a carbon dioxide refrigerant are obtained by compounding an acid trapping agent or an acid trapping agent and an extreme pressure agent with compositions.</p> |
