A method for reducing wear between two surfaces in sliding contact with one another includes introducing nanoparticles between the two surfaces in an amount and having a composition that results in shear lines being generated within at least one agglomerated wear particle that is generated between the two surfaces as a result of the sliding contact, and subjecting the agglomerated wear particles to at least one load, using at least one of the two surfaces, such that the agglomerated wear particles disassemble along the shear lines into multiple smaller wear particles.

A composition of an oil-soluble ionic detergent that does not contribute metal ions to the composition, and which comprises a quaternary non-metallic pnictogen cation and an organic anion having at least one hydrocarbyl group of sufficient length to impart oil solubility to the detergent, the detergent having a total base number (TBN) to total acid number (TAN) ratio of at least 2:1 imparts ash-free basicity to a lubricant composition.

The present invention relates to lubricant composition comprising: a corrosion inhibitor comprising A1 and A2: A1: 0.3-3 wt. % of one or more octadecylamine NC.sub.10-20 alkanoyl sarcosinates, A2: 1-5 wt. % of one or more substances selected from lanolin magnesium soap, lanolin calcium soap, lanolin barium soap, lanolin lithium soap, barium petroleum sulfonate and sodium petroleum sulfonate, 0.2-2 wt. % of one or more surfactants selected from Span-80, AEO-9 and TX-4; 10-40 wt. % of a lubricant base, 0.2-2 wt. % of fullerene C60, 50-80 wt. % of a solvent selected from D80, D100 and D110, and optionally, a propellant gas; all wt. % percentages are based on the total weight of the lubricant composition.

A dry film lubricant composition includes: an anionic wax emulsion including carnauba wax and an anionic surfactant; water; a thickener; an organic solvent; a fluorosurfactant; a phosphate additive; and an alkaline agent.

A dry film lubricant composition includes: an anionic wax emulsion including carnauba wax and an anionic surfactant; water; a thickener; an organic solvent; a fluorosurfactant; a phosphate additive; and an alkaline agent.

A thermally conductive grease composition containing a matrix resin and a thermally conductive filler. The matrix resin contains a liquid dimethylpolysiloxane (A) having a kinematic viscosity of 100 to 10,000 mm.sup.2/s at 40 C. and an ethylene-propylene copolymer (B) having a kinematic viscosity of 1 to 10,000 mm.sup.2/s at 40 C. The matrix resin contains 50 parts by mass or more and 97 parts by mass or less of the liquid dimethylpolysiloxane (A) and 3 parts by mass or more and 50 parts by mass or less of the ethylene-propylene copolymer (B) where a total amount of the liquid dimethylpolysiloxane (A) and the ethylene-propylene copolymer (B) is 100 parts by mass. The thermally conductive filler is present in an amount of 400 to 2500 parts by mass with respect to 100 parts by mass of the total amount of the liquid dimethylpolysiloxane (A) and the ethylene-propylene copolymer (B).

A thermally conductive grease composition containing a matrix resin and a thermally conductive filler. The matrix resin contains a liquid dimethylpolysiloxane (A) having a kinematic viscosity of 100 to 10,000 mm.sup.2/s at 40 C. and an ethylene-propylene copolymer (B) having a kinematic viscosity of 1 to 10,000 mm.sup.2/s at 40 C. The matrix resin contains 50 parts by mass or more and 97 parts by mass or less of the liquid dimethylpolysiloxane (A) and 3 parts by mass or more and 50 parts by mass or less of the ethylene-propylene copolymer (B) where a total amount of the liquid dimethylpolysiloxane (A) and the ethylene-propylene copolymer (B) is 100 parts by mass. The thermally conductive filler is present in an amount of 400 to 2500 parts by mass with respect to 100 parts by mass of the total amount of the liquid dimethylpolysiloxane (A) and the ethylene-propylene copolymer (B).