초록 ▼

The present invention provides a refrigerating oil composition containing a refrigerant (A) containing as a predominant component a C1-C8 hydrocarbon compound and a base oil (B) composed of a polyalkylene glycol ether having a specific structure and/or a polyvinyl ether having a specific structure,

The present invention provides a refrigerating oil composition containing a refrigerant (A) containing as a predominant component a C1-C8 hydrocarbon compound and a base oil (B) composed of a polyalkylene glycol ether having a specific structure and/or a polyvinyl ether having a specific structure, and satisfying the following conditions: solubility of the refrigerant (A) in the base oil (B) of 40 mass % or less at 40° C. and 1.2 MPa and mixture viscosity of the refrigerating oil composition of 0.1 mm2/s or more at 90° C. and 2.3 MPa. According to the refrigerating oil composition of the present invention, refrigerating oil and hydrocarbon-based refrigerant are mutually dissolved at an appropriate degree, and lubrication can be fully attained by the refrigerating oil. Even when the hydrocarbon-based refrigerant is used in an amount smaller than the conventional amount, cooling can be performed satisfactorily.

대표청구항 ▼

1. A refrigerating oil composition, comprising: a refrigerant (A) comprising as a predominant component propane; anda base oil (B) comprising a polyvinyl ether represented by formula (II): wherein each of R3 and R4 represents a hydrogen atom, a C1-C18 hydrocarbon group, or a C2-C18 acyl group; R5 r

1. A refrigerating oil composition, comprising: a refrigerant (A) comprising as a predominant component propane; anda base oil (B) comprising a polyvinyl ether represented by formula (II): wherein each of R3 and R4 represents a hydrogen atom, a C1-C18 hydrocarbon group, or a C2-C18 acyl group; R5 represents a methyl group; R6 represents an ethyl group; p is an integer of 1 or more; and q is an integer of 1 or more and wherein p/(p+q) in formula (II) is 0.5 or more; wherein the composition satisfies the following conditions:(i) solubility of the refrigerant (A) in the base oil (B) is 40 mass % or less at 40° C. and 1.2 MPa; and(ii) mixture viscosity of the refrigerating oil composition is 0.1 mm2/s or more at 90° C. and 2.3 MPa. 2. A refrigerating oil composition as described in claim 1, wherein the solubility of the refrigerant (A) in the base oil (B) is 2 to 40 mass % at 40° C. and 1.2 MPa. 3. A refrigerating oil composition as described in claim 2, wherein the solubility of the refrigerant (A) in the base oil (B) is 2 to 30 mass % at 40° C. and 1.2 MPa. 4. A refrigerating oil composition as described in claim 3, wherein the solubility of the refrigerant (A) in the base oil (B) is 5 to 25 mass % at 40° C. and 1.2 MPa. 5. A refrigerating oil composition as described in claim 1, which exhibits a mixture viscosity of 0.5 mm2/s or more at 90° C. and 2.3 MPa. 6. A refrigerating oil composition as described in claim 1, wherein the base oil (B) has a weight average molecular weight (Mw) of 500 or more. 7. A refrigerating oil composition as described in claim 1, wherein the base oil (B) has an oxygen atom content of 10 mass % or more.