Refrigerator oil composition and mixed composition for refrigerator

A method for producing a refrigerator oil composition, comprising at least one unsaturated fluorinated hydrocarbon compounds selected from compounds represented by the following formula (1):

• CxFyHz (1),
• wherein x is an integer of 2 to 6, y is an integer of 1 to 11, z is an integer of 1 to 11, and one or more carbon-carbon unsaturated bonds are present,
• the method comprising mixing a base oil (A) selected from the group consisting of a polyalkylene glycol compound, a polyvinyl ether compound, a copolymer of poly(oxy)alkylene glycol or a monoether thereof and a polyvinyl ether, and a polyol ester compound;
• an epoxy compound (B), wherein the epoxy compound (B) comprises the following groups (B1) and (B2), and
• a glycidyl ether compound (C);
• (B1) at least one divalent group represented by the following formula (1);
• (B2) at least one ester group,
• wherein the epoxy compound (B) is at least one selected from the group consisting of an epoxidized fatty acid ester represented by the following general formula (1-1), an epoxidized alicyclic carboxylic acid ester represented by the following general formula (1-2), and an epoxidized vegetable oil:
• wherein R1 is a hydrocarbon group having 4 to 20 carbon atoms, R2 is a hydrocarbon group having 1 to 10 carbon atoms, p is an integer of 1 to 3, n is an integer of 0 to 12, m is an integer of 1 to 3, and when m is 2 or more, a plurality of structures in brackets [] may be the same as or different from each other, and
• wherein R3 and R4 are each independently a hydrocarbon group having 4 to 20 carbon atoms,
• wherein the epoxidized vegetable oil is at least one selected from the group consisting of an epoxidized soybean oil, an epoxidized linseed oil, an epoxidized rice bran oil, and an epoxidized cottonseed oil,
• wherein a content of the epoxy compound (B) is from 0.10% by mass to 10.00% by mass based on the total amount of the refrigerator oil composition, and
• wherein a content of the glycidyl ether compound (C) is from 0.10 to 10.00% by mass based on the total amount of the refrigerator oil composition.