초록 ▼

There is provided a refrigerating machine oil composition comprising a base oil containing a polyvinyl ether and/or a polyoxyalkylene glycol derivative as a main component and having a kinematic viscosity of 1 to 8 mm2/s as measured at 40° C. The refrigerating machine oil composition is prefera

There is provided a refrigerating machine oil composition comprising a base oil containing a polyvinyl ether and/or a polyoxyalkylene glycol derivative as a main component and having a kinematic viscosity of 1 to 8 mm2/s as measured at 40° C. The refrigerating machine oil composition is preferably applied to refrigerators having a sliding portion which is made of an engineering plastic material, or provided thereon with an organic coating film or an inorganic coating film. The refrigerating machine oil composition has a low viscosity, an improved energy saving performance, a good sealability and an excellent compatibility with a refrigerant and, therefore, can be suitably used in various refrigerating application fields, in particular, in closed-system refrigerators.

대표청구항 ▼

What is claimed is: 1. A refrigerating machine oil composition comprising: a base oil comprising: a polyvinyl ether; and a polyoxyalkylene glycol derivative; wherein a kinematic viscosity of the refrigerating machine oil is 1 to 8 mm2/s as measured at 40° C., and the polyoxyalkylene glycol der

What is claimed is: 1. A refrigerating machine oil composition comprising: a base oil comprising: a polyvinyl ether; and a polyoxyalkylene glycol derivative; wherein a kinematic viscosity of the refrigerating machine oil is 1 to 8 mm2/s as measured at 40° C., and the polyoxyalkylene glycol derivative is a compound represented by the general formula (II): R6—[(OR7)m—OR8]n  (II) wherein R6 is a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, an acyl group having 2 to 3 carbon atoms; R7 is an alkylene group having 2 to 4 carbon atoms; R8 is a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or an acyl group having 2 to 3 carbon atoms; n is 1; and m is a number of more than 2 but not more than 20 on average. 2. The refrigerating machine oil composition according to claim 1, wherein each of the polyvinyl ether and the polyoxyalkylene glycol derivative have a molecular weight of 100 to 600. 3. The refrigerating machine oil composition according to claim 1, wherein a flash point of the refrigerating machine oil composition is 100° C. or higher. 4. The refrigerating machine oil composition according to claim 1, wherein the polyvinyl ether is a compound having a repeating unit represented by the general formula (I): wherein R1, R2 and R3 are respectively a hydrogen atom or a hydrocarbon group having 1 to 8 carbon atoms, and may be the same or different; R4 is a divalent hydrocarbon group having 1 to 10 carbon atoms; R5 is a hydrocarbon group having 1 to 20 carbon atoms; k is a number of 0 to 10 on average; R1 to R5 in one repeating unit may be respectively the same as or different from those in the other repeating units; and when k is 2 or more, a plurality of the R4O groups may be the same or different. 5. The refrigerating machine oil composition according to claim 1, wherein the polyoxyalkylene glycol derivative is a compound selected from the group consisting of polypropylene glycol dimethyl ether, polyethylene-polypropylene glycol copolymer dimethyl ether and polypropylene glycol diacetate. 6. The refrigerating machine oil composition according to claim 1, further comprising at least one additive selected from the group consisting of an extreme pressure agent, an oiliness agent, an antioxidant, an acid scavenger and a defoaming agent. 7. The refrigerating machine oil composition according to claim 1, wherein said composition is applied to a refrigerator using a hydrocarbon-based, carbon dioxide-based, hydrofluorocarbon-based or ammonia-based refrigerant.