Refrigerator oil composition and refrigerator mixture composition

1 . A refrigerator mixture composition, comprising:

a refrigerant; and

a refrigerator oil composition, comprising:

a base oil (A);

a first phosphorus compound (B); and

a second phosphorus compound (C),

wherein the base oil (A) comprises at least one type of base oil (A2) selected from the group consisting of a polyalkyleneglycol and a polyvinylether,

wherein the content of the base oil (A2) is 50 to 100% by mass based on the total amount of the base oil (A),

wherein the first phosphorus compound (B) is a reaction product of bis [2,4-bis(2-methylbutane-2-yl)phenyl]4-(2-methylbutane-2-yl)phenyl phosphite, 2,4-bis(2-methylbutane-2-yl)phenylbis [4-(2-methylbutane-2-yl)phenyl]phosphite, and tris [4-(2-methylbutane-2-yl)phenyl]phosphite,

wherein the content of the first phosphorus compound (B) is 0.3 to 0.5% by mass based on the total amount of the refrigerator oil composition,

wherein the second phosphorus compound (C) is at least one selected from the group consisting of a phosphoric acid compound (C1) and an organic phosphine oxide compound (C2), and

wherein the content of the second phosphorus compound (C) is 0.5 to 0.9% by mass based on the total amount of the refrigerator oil composition.

2 . The refrigerator mixture composition according to claim 1 , wherein a phosphorus atom content is 200 ppm by mass to 1,500 ppm by mass based on a total amount of the refrigerator oil composition.

3 . The refrigerator mixture composition according to claim 1 , wherein the base oil (A) further comprises at least one selected from the group consisting of a copolymer of poly(oxy)alkyleneglycol or its monoether, a polyolester, and mineral oil.

4 . A method of producing a refrigerator oil composition in a refrigerator mixture composition, the method comprising:

mixing a base oil (A) with a first phosphorus compound (B) and a second phosphorus compound (C) to produce a refrigerator oil composition,

wherein the base oil (A) comprises at least one type of base oil (A2) selected from the group consisting of a polyalkyleneglycol and a polyvinylether,

wherein the content of the base oil (A2) is 50 to 100% by mass based on the total amount of the base oil (A),

wherein the first phosphorus compound (B) is a reaction product of bis [2,4-bis(2-methylbutane-2-yl)phenyl]4-(2-methylbutane-2-yl)phenyl phosphite, 2,4-bis(2-methylbutane-2-yl)phenylbis [4-(2-methylbutane-2-yl)phenyl]phosphite, and tris [4-(2-methylbutane-2-yl)phenyl]phosphite,

wherein the content of the first phosphorus compound (B) is 0.3 to 0.5% by mass based on the total amount of the refrigerator oil composition,

wherein the second phosphorus compound (C) is at least one selected from the group consisting of a phosphoric acid compound (C1) and an organic phosphine oxide compound (C2),

wherein the content of the second phosphorus compound (C) is 0.5 to 0.9% by mass based on the total amount of the refrigerator oil composition, and

wherein to the refrigerator oil composition, a refrigerant is added thereto.

5 . The refrigerator mixture composition according to claim 1 , wherein the refrigerant comprises at least one selected from the group consisting of an unsaturated fluorinated hydrocarbon compound, a saturated fluorinated hydrocarbon compound, hydrocarbon, carbon dioxide, and ammonia.

6 . The refrigerator mixture composition according to claim 5 , wherein the refrigerant comprises an unsaturated fluorinated hydrocarbon compound.

7 . The refrigerator mixture composition according to claim 6 , wherein the unsaturated fluorinated hydrocarbon compound is 2,3,3,3-tetrafluoropropene (R1234yf).

8 . The refrigerator mixture composition according to claim 1 , wherein the phosphorus atom content (B P ) derived from the first phosphorus compound (B) is 30 ppm by mass to 1,000 ppm by mass based on a total amount of the refrigerator oil composition.

9 . The refrigerator mixture composition according to claim 1 , wherein the phosphorus atom content (B P ) derived from the first phosphorus compound (B) is 146 ppm by mass to 244 ppm by mass based on a total amount of the refrigerator oil composition.

10 . The refrigerator mixture composition according to claim 1 , wherein the phosphorus atom content (C P ) derived from the second phosphorus compound (C) is 200 ppm by mass to 1,200 ppm by mass based on a total amount of the refrigerator oil composition.

11 . The refrigerator mixture composition according to claim 1 , wherein the phosphorus atom content (C P ) derived from the second phosphorus compound (C) is 420 ppm by mass to 981 ppm by mass based on a total amount of the refrigerator oil composition.