Patent ID: 9234155
Filing Date: 2016-01-12
CPC Classification: C09K,C10M,C10N

Claim Text:
1. A refrigerating machine oil composition comprising: 2 to 20 mass % based on a total amount of the refrigerating machine oil composition of at least one ester additive selected from tetraesters of pentaerythritol and one selected from fatty acids having 5 to 18 carbon atoms and hexaesters of dipentaerythritol and one selected from fatty acids having 5 to 18 carbon atoms; a base oil that is an ester other than the ester additive; and 0.1 to 5 mass % of a phosphate and/or 0.01 to 2 mass % of a sulfide compound based on the total amount of the refrigerating machine oil composition, wherein a kinematic viscosity of the refrigerating machine oil composition at 40° C. is 3 to 500 mm