Patent ID: 8083965
Filing Date: 2011-12-27
Classification: C10M,C10N

Abstract:
1. A refrigerating machine oil, comprising: a mineral oil obtained by hydrorefining and/or hydrotreatment of not less than 93.5% by mass; at least one phosphorothionate selected from the group consisting of triphenyl phosphorothionate, tricresyl phosphorothionate, trixylenyl phosphorothionate, cresyl diphenyl phosphorothionate, and xylenyl diphenyl phosphorothionate, of 0.1 to 1.5% by mass; and at least one phosphoric acid ester selected from the group consisting of triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, and xylenyl diphenyl phosphate, of 0.5 to 1.5% by mass, based on the total amount of the refrigerating machine oil, wherein a nitrogen content in the mineral oil is no more than 20 ppm by mass, a percentage of aromatic ring structure (% C