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US 2025/0197754 A1Published application
Lubricant composition and method for producing same
AssigneeIdemitsu Kosan Co., Ltd.
InventorShizuka AGANO
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Abstract
Provided a lubricant composition containing a lubricant base oil (A) and particles (B-1) containing a thickener (B), in which the particles (B-1) satisfy requirement (α): an arithmetic average particle diameter on a volume basis when the particles (B-1) are measured in an environment of 25° C. by a laser diffraction/scattering method is 10.0 μm or less, and the lubricant composition satisfies requirement (β):a ratio [(x1)/(x2)] of a shear viscosity (x1) at 40° C. at a shear rate of 5 sec−1 and a shear viscosity (x2) at 40° C. at a shear rate of 10,000 sec−1 is 2.0 or more and 100 or less.
Claims20
1:
- A lubricant composition, comprising:
- a lubricant base oil;
- and
- particles comprising a thickener,
- wherein an arithmetic average particle diameter of the particles on a volume basis is 10.0 μm or less when the particles are measured in an environment of 25° C. by a laser diffraction/scattering method, and a ratio of a shear viscosity of the lubricant composition at 40° C. at a shear rate of 5 sec−1 and a shear viscosity of the lubricant composition at 40° C. at a shear rate of 10,000 sec−1 is in a range of 2.0 to 100.
2 more elements
2:
- The lubricant composition according to claim 1, wherein the thickener comprises a urea-based thickener.
3:
- The lubricant composition according to claim 1, wherein a content of the thickener is 0.1 mass % or more and less than 2.0 mass % based on a total amount of the lubricant composition.
4:
- An impregnation bearing oil, comprising:
- the lubricant composition of claim 1.
5:
- A method of lubricating an oil-impregnated bearing or a machine tool, comprising:
- applying the lubricant composition of claim 1 to an impregnation bearing or a machine tool.
6:
- A method for producing a lubricant composition, comprising:
- mixing a lubricant base oil and a grease comprising particles comprising a thickener,
- wherein an arithmetic average particle diameter of the particles in the grease on a volume basis is 5.0 μm or less when the particles are measured in an environment of 25° C. by a laser diffraction/scattering method.
7:
- The method for producing the lubricant composition according to claim 6, wherein the thickener comprises a urea-based thickener.
8:
- The method for producing the lubricant composition according to claim 6, wherein a content of the thickener in the grease is in a range of 3 mass % to 20 mass % based on a total amount of the grease.
9:
- The method for producing the lubricant composition according to claim 6, wherein the grease has a, worked penetration of 310 or more at 25° C.
10:
- A lubricating oil for a machine tool, comprising:
- the lubricant composition of claim 1.
11:
- The lubricant composition according to claim 2, wherein a content of the thickener is 0.1 mass % or more and less than 2.0 mass % based on a total amount of the lubricant composition.
12:
- An impregnation bearing oil, comprising:
- the lubricant composition of claim 2.
13:
- A lubricating oil for a machine tool, comprising:
- the lubricant composition of claim 2.
14:
- A method of lubricating an oil-impregnated bearing or a machine tool, comprising:
- applying the lubricant composition of claim 2 to an impregnation bearing or a machine tools.
15:
- An impregnation bearing oil, comprising:
- the lubricant composition of claim 3.
16:
- A lubricating oil for a machine tool, comprising:
- the lubricant composition of claim 3.
17:
- The method for producing the lubricant composition according to claim 7, wherein a content of the thickener in the grease is in a range of 3 mass % to 20 mass % based on a total amount of the grease.
18:
- The method for producing the lubricant composition according to claim 7, wherein the grease has a worked penetration of 310 or more at 25° C.
19:
- The method for producing the lubricant composition according to claim 8, wherein the grease has a worked penetration of 310 or more at 25° C.
20:
- The method for producing the lubricant composition according to claim 18, wherein the grease has a worked penetration of 310 or more at 25° C.