Greenblum & Bernstein, P.L.C.
Refrigerator oil composition, method for producing same, and working fluid composition for refrigerators
A refrigerating machine oil composition comprising 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, and a base oil that is an ester other than the ester additive, in which the content of the ester additive is 2 to 20 mass % based on the total amount of the refrigerating machine oil composition, and the kinematic viscosity of the refrigerating machine oil composition at 40° C. is 3 to 500 mm2/s.
JX NIPPON OIL & ENERGY CORPORATION
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Kuniko Hiroshi Takeshi Masanori
Adegawa Eto Okido Saito