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US 2020/0024544 A1Published application
Lubricant composition, composition for refrigerating machines, and method for detecting leakage point
AssigneeIdemitsu Kosan Co., Ltd.
InventorMasato KANEKO
Life of this patent
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Abstract
Provided is a lubricant composition which is excellent in thermal stability and chemical stability while making it possible to detect a leakage point of the lubricant composition, etc. with a fluorescent agent. The lubricant composition is one containing a base oil (A) and a fused ring compound (B) being fluorescent, having a tri- or higher fused ring, and not having nitrogen, oxygen, and sulfur in a molecule thereof, wherein the fused ring compound (B) is contained in an amount of 0.001 to 1.0% by mass on a basis of the whole amount of the lubricant composition.
Claims8
1:
- A lubricant composition, comprising
- (A) a base oil (A);
- and
- (B) a fluorescent fused ring compound (B) being fluorescent, having a tri- or higher fused ring, and not having nitrogen, oxygen, and sulfur in a molecule thereof,
- wherein the fused ring compound (B) is contained in an amount of 0.001 to 1.0% by mass on a basis of the whole amount of the lubricant composition.
2 more elements
2:
- The lubricant composition according to claim 1, wherein the base oil (A) is at least one selected from the group consisting of a mineral oil, a polyalkylene glycol, a polyvinyl ether, a polyol ester, an alkylbenzene, and a poly-α-olefin.
3:
- The lubricant composition according to claim 1, wherein the fused ring compound (B) is at least one selected from the group consisting of a perylene-based compound, a naphthacene-based compound, and an anthracene-based compound.
4:
- The lubricant composition according to claim 1, further comprising
- (C) a coloring agent (C).
5:
- The lubricant composition according to claim 1, which is adapted to function as a lubricant composition for any of a refrigerator oil, a hydraulic oil, a bearing oil, a gear oil, a turbine oil, a transmission oil, a shock absorber oil, and a motor cooling oil.
6:
- A composition for refrigerating machines, the composition comprising the lubricant composition according to claim 1 and a refrigerant (D).
7:
- The composition for refrigerating machines according to claim 6, wherein the refrigerant (D) comprises at least one selected from a saturated fluorinated hydrocarbon refrigerant having 1 to 3 carbon atoms and an unsaturated fluorinated hydrocarbon refrigerant having 3 carbon atoms.
8:
- A method of detecting a leakage point, the method comprising using the lubricant composition according to claim 1 in an apparatus including a lubricant composition, to judge the presence or absence of leakage of the lubricant composition based on the presence or absence of light emission of the fused ring compound (B).