Grease composition, rolling bearing, and motor
AssigneeMINEBEA MITSUMI Inc.
InventorYusuke ASAI
Life of this patent
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Abstract
A grease composition including: a base oil, a thickener, and 0.2 wt % or more of a dispersing agent. The dispersing agent includes at least one of a metal salt of a carboxylic acid, a metal salt of a polycarboxylic acid, and a copolymer of a carboxylic acid metal salt and a hydrocarbon compound, and the dispersing agent has an average particle diameter of 0.5 μm or more and 5 μm or less. The metal salt of the carboxylic acid, the metal salt of the polycarboxylic acid, and the carboxylic acid metal salt forming the copolymer of the carboxylic acid metal salt and the hydrocarbon compound may be an alkali metal salt including at least one of a sodium salt, a lithium salt and a potassium salt, or an alkali earth metal salt including at least one of a magnesium salt and a calcium salt.
Claims10
A grease composition comprising:
- a base oil;
- a thickener;
- and
- 0.2 wt % or more of a dispersing agent, wherein
- the dispersing agent comprises at least one of a carboxylic acid metal salt, a metal salt of a polycarboxylic acid and a copolymer of a carboxylic acid metal salt and a hydrocarbon compound, and
- the dispersing agent has an average particle diameter of 0.5 μm or more and 5 μm or less.
A grease composition comprising:
- a base oil;
- a thickener comprising a diurea compound represented by Formula (1):
- R1—NHCONH—R2—NHCONH—R3 (1)
- where R1, R2, and R3 are hydrocarbon groups selected from aliphatic hydrocarbon groups, alicyclic hydrocarbon groups and aromatic hydrocarbon groups;
- and
- 0.2 wt % or more and 5 wt % or less of a dispersing agent, wherein
- the dispersing agent comprises at least one of a sodium salt of sebacic acid, a sodium salt of polyacrylic acid, and a copolymer of a maleic acid sodium salt and isobutylene;
- and
- the dispersing agent has an average particle diameter of 0.5 μm or more and 5 μm or less.
Dependencies are inferred from the claim text.