Particle-containing grease composition
AssigneeDIC Corporation
InventorsHironobu Matsueda, Yusuke Kano, Akihiro Koike, Jianjun Yuan
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Abstract
Provided is a particle-containing grease composition that can efficiently improve friction and wear resistance properties with a small added amount and exhibits excellent friction and wear resistance properties even when a clearance and the surface roughness of the friction surface in sliding parts are extremely small. The particle-containing grease composition includes base oil, a thickener, and molybdenum disulfide particles, in which a median diameter D50 of the molybdenum disulfide particles determined by a dynamic light scattering method is 10 nm or more and less than 450 nm.
Claims7
A particle-containing grease composition comprising:
- base oil;
- a thickener;
- and
- molybdenum disulfide particles,
- wherein the molybdenum disulfide particles are sulfide made of molybdenum trioxide particles made of aggregates of primary particles containing a β crystal structure,
- a median diameter D50 of the molybdenum disulfide particles determined by a dynamic light scattering method is 10 nm or more and less than 450 nm,
- a shape of primary particles of the molybdenum disulfide particles is a disk shape, a ribbon shape, or a sheet shape, and a thickness is in a range of 3 nm to 100 nm,
- a specific surface area of the molybdenum disulfide particles is 10 m2/g or more measured by a BET method, and
- a bulk density of the molybdenum disulfide particles is 0.1 g/cm3 or more and 1.0 g/cm3 or less.
Dependencies are inferred from the claim text.