| abstract |
Provided is a refrigerator oil composition for a refrigerant containing an unsaturated fluorinated compound having a carbon-carbon unsaturated bond, which is represented by a general formula (I): C 2 F p R 4-p , wherein R each independently represents a hydrogen atom, a chlorine atom, a bromine atom, or an iodine atom, and p represents an integer of 1 to 3. The composition contains a base oil (P) including one or more kinds selected from polyvinyl ethers, polyalkylene glycols, copolymers of a poly(oxy)alkylene glycol or a monoether thereof and polyvinyl ethers, and a polyol ester. The kinematic viscosity at 100°C of the base oil (P) is 2.00 to 50.00 mm 2 /s, and the hydroxyl value thereof is 5.0 mgKOH/g or less. The refrigerator oil composition is excellent in compatibility with a refrigerant containing an unsaturated fluorinated compound having 2 carbon atoms and having a specific atom, and is also excellent in thermal stability. |