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US 12,146,117 B2Granted
Refrigerator oil, and working fluid composition for refrigerator
AssigneeEneos Corporation
InventorSatoshi Nagai
Life of this patent
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Abstract
A refrigerating machine oil according to the present invention contains a lubricating base oil and alkylated hydroxyanisole, and a working fluid composition for a refrigerating machine according to the present invention contains the refrigerating machine oil and a refrigerant.
Claims6
A refrigerating machine oil comprising:
- a lubricating base oil;
- an alkylated hydroxyanisole comprising a butylhydroxyanisole;
- 2,6-di-tert-butyl-p-cresol;
- and
- an epoxy-based acid scavenger selected from the group consisting of a glycidyl ether type epoxy compound and a glycidyl ester type epoxy compound,
- and the refrigerating machine oil being used with a refrigerant,
- wherein the lubricating base oil consists of at least one selected from the group consisting of
- an oxygen-containing oil,
- wherein the oxygen-containing oil consists of a polyol ester of
- a polyhydric alcohol comprising pentaerythritol and
- a fatty acid having 4 to 9 carbon atoms,
- and
- wherein a content of the alkylated hydroxyanisole is 0.6% by mass or more and 3.0% by mass or less, a content of the 2,6-di-tert-butyl-p-cresol is 0.1% by mass or more and 3.0% by mass or less, and a content of the epoxy-based acid scavenger is 0.1% by mass or more and 4% by mass or less, based on a total amount of the refrigerating machine oil.
10 more elements
A working fluid composition for a refrigerating machine, comprising:
- a refrigerant;
- and
- a refrigerating machine oil comprising
- a lubricating base oil,
- an alkylated hydroxyanisole comprising a butylhydroxyanisole, and
- 2,6-di-tert-butyl-p-cresol, and
- an epoxy-based acid scavenger selected from the group consisting of a glycidyl ether type epoxy compound and a glycidyl ester type epoxy compound,
- wherein the lubricating base oil consists of at least one selected from the group consisting of
- an oxygen-containing oil,
- wherein the oxygen-containing oil consists of a polyol ester of
- a polyhydric alcohol comprising pentaerythritol and
- a fatty acid having 4 to 9 carbon atoms, and
- wherein a content of the alkylated hydroxyanisole is 0.6% by mass or more and 3.0% by mass or less, a content of the 2,6-di-tert-butyl-p-cresol is 0.1% by mass or more and 3.0% by mass or less, and a content of the epoxy-based acid scavenger is 0.1% by mass or more and 4% by mass or less, based on a total amount of the refrigerating machine oil.
10 more elements
Dependencies are inferred from the claim text.