Patent ID: 9617497
Date: 2017-04-11
CPC Classifications: C09K,C10M,C10N

Claim:
1. A refrigerant composition, comprising: (a) a lubricating oil composition comprising (a1) a base oil and (a2) at least one naphthalimide compound; and (b) a refrigerant consisting of an unsaturated hydrofluorocarbon having a GWP of 1000 or less, wherein (1) the base oil (a1) comprises at least one compound selected from the group consisting of a polyvinylether, a polyalkylene glycol, a polyol ester and an ether compound represented by formula (1): wherein Ra and Rd each, independently, represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an acyl group having 2 to 10 carbon atoms, or a hydrocarbon group having 2 to 6 bonds and having 1 to 10 carbon atoms; Rb and Rc each, independently, represent an alkylene group having 2 to 4 carbon atoms; n and k each, independently, are an integer of 0 to 20; x is an integer of 1 to 6; (B) represents a polymer portion having 3 or more monomer units represented by formula (2): (2) the naphthalimide compound (a2) is represented by formula (6): wherein R (3) the refrigerant composition comprises 0.001 mass % to 10 mass % of the naphthalimide compound (a2), based on the total amount of the lubricating oil composition (a).