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US 12,227,712 B2Granted
Refrigerating machine oil, working fluid composition for refrigerating machine, lubricating method, and method for producing refrigerating machine oil
AssigneeEneos Corporation
InventorsYohei Shono, Fumiyuki Nara
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Abstract
A refrigerating machine oil containing: a lubricating base oil; and a polymer additive, wherein a carbon residue of 10% residual oil is 0.05% by mass or more.
Claims7
A refrigerating machine oil comprising:
- a lubricating base oil comprising a mineral oil;
- and
- a polymer additive, and
- the refrigerating machine oil being used with a refrigerant, wherein:
- a carbon residue of 10% residual oil of the refrigerating machine oil is 0.05% by mass or more, as measured in accordance with micro method in accordance with JIS K2270-2:2009;
- the polymer additive is a copolymer of only a maleic acid ester and an α-olefin, and has a ratio of a carbon residue (% by mass) to a kinematic viscosity at 100° C. (mm2/s) of 0.011 to 0.02;
- the maleic acid ester is an ester of maleic acid with an aliphatic alcohol having 3 to 8 carbon atoms;
- and
- a content of the polymer additive is 0.8% by mass or more and 3% by mass or less based on the total amount of the refrigerating machine oil.
6 more elements
A method for producing a refrigerating machine oil, comprising mixing a polymer additive with a lubricating base oil comprising a mineral oil, the refrigerating machine oil being used with a refrigerant;
- wherein:
- a carbon residue of 10% residual oil of the refrigerating machine oil is 0.05% by mass or more, as measured in accordance with micro method in accordance with JIS K2270-2:2009;
- the polymer additive is a copolymer of only a maleic acid ester and an α-olefin, and has a ratio of a carbon residue (% by mass) to a kinematic viscosity at 100° C. (mm2/s) of 0.011 to 0.02;
- the maleic acid ester is an ester of maleic acid with an aliphatic alcohol having 3 to 8 carbon atoms;
- and
- a content of the polymer additive is 0.8% by mass or more and 3% by mass or less based on the total amount of the refrigerating machine oil.
3 more elements
Dependencies are inferred from the claim text.