Refrigerator lubricating oil and mixed composition for refrigerator
AssigneeIdemitsu Kosan Co., Ltd.
InventorsMasato Kaneko, Takahiro Hoshida
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Abstract
The refrigerator lubricating oil of the present invention contains: a base oil containing, as a major component, a polyol ester (A) of a fatty acid (a1) that is a fatty acid having a number of carbon atoms of from 3 to 18 and a polyol (a2) that is selected from neopentyl glycol, trimethylolethane, trimethylolpropane, trimethylolbutane, pentaerythritol, and dipentaerythritol; and a disulfide and/or trisulfide compound (B), and the disulfide and/or trisulfide compound (B) is blended in an amount of from 30 to 10,000 ppm by mass in terms of sulfur equivalent based on the total amount of the refrigerator lubricating oil.
Claims15
A refrigerator lubricating oil, comprising:
- a base oil comprising, as a major component, a polyol ester (A) of a fatty acid (art) having a number of carbon atoms of from 3 to 18 and a polyol (a2) that is at least one selected from the group consisting of neopentyl glycol, trimethylolethane, trimethylolpropane, trimethylolbutane, pentaerythritol, and dipentaerythritol;
- and
- a disulfide compound (B) and a trisulfide compound (B), blended in an amount of from 30 to 10,000 ppm by mass in terms of sulfur equivalent based on a total amount of the refrigerator lubricating oil,
- wherein the disulfide compound (B) and the trisulfide compound (B) are represented by formula (2):
- R1—Sn—R2 (2),
- wherein:
- R1 and R2 are each independently a hydrocarbon having a number of carbon atoms of from 1 to 4;
- and
- n is 2 in the disulfide compound (B) and n is 3 in the trisulfide compound (B).
A mixed composition for a refrigerator, the mixed composition comprising:
- a refrigerant comprising at east one unsaturated fluorinated hydrocarbon compound represented by formula (1):
- CpFrHs (1).
- wherein:
- p represents an integer of from 2 to 6;
- r represents an integer of from 1 to 11;
- and
- s represents an integer of from 1 to 11,
- provided that the compound has one or more carbon-carbon unsaturated bond in a molecule;
- and
- a refrigerator lubricating oil comprising:
- a base oil comprising, as a major component, a polyol ester (A) of a fatty acid (a1) having a number of carbon atoms of from 3 to 18 and a polyol (a2) that is at least one selected from the group consisting of neopentyl glycol, trimethylolethane, trimethylolpropane, trimethylolbutane, pentaerythritol, and dipentaerythritol;
- and
- a disulfide compound (B) and a trisulfide compound (B), blended in an amount of from 30 to 10,000 ppm by mass in terms of sulfur equivalent based on a total amount of the refrigerator lubricating oil,
- wherein the disulfide compound (B) and the trisulfide compound (B) are represented by formula (2):
- R1—Sn—R2 (2)
- wherein:
- R1 and R2 are each independently a hydrocarbon having a number of carbon atoms of from 1 to 4;
- and
- n is 2 in the disulfide compound (B) and n is 3 in the trisulfide compound (B).
A refrigerator, comprising:
- a refrigerant comprising at least one unsaturated fluorinated hydrocarbon compound represented by formula (1):
- CpFrHs (1),
- wherein:
- p represents an integer of from 2 to 6;
- r represents an integer of from 1 to 11;
- and
- s represents an integer of from 1 to 11,
- provided that the compound has one or more carbon-carbon unsaturated bond in a molecule;
- and
- a refrigerator lubricating oil comprising:
- a base oil containing, as a major component, a polyol ester (A) of a fatty acid (a1) that is a fatty acid having a number of carbon atoms of from 3 to 18 and a polyol (a2) that is at least one selected from the group consisting of neopentyl glycol, trimethylolethane, trimethylolpropane, trimethylolbutane, pentaerythritol, and dipentaerythritol;
- and
- a disulfide compound (B) and a trisulfide compound (B), blended in an amount of from 30 to 10,000 ppm by mass in terms of sulfur equivalent based on a total amount of the refrigerator lubricating oil,
- wherein the disulfide compound (B) and the trisulfide compound (B) are represented by formula (2):
- R1—Sn—R2 (2),
- wherein:
- R1 and R2 are each independently a hydrocarbon having a number of carbon atoms of from 1 to 4;
- and
- n is 2 in the disulfide compound (B) and n is 3 in the trisulfide compound (B).
Dependencies are inferred from the claim text.