Provided herein are grease compositions comprising at least one estolide compound of formula: ##STR00001##
in which n is an integer equal to or greater than 0; m is an integer equal to or greater than 2; R.sub.1, independently for each occurrence, is selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; R.sub.2 is selected from hydrogen and optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; and R.sub.3 and R.sub.4, independently for each occurrence, are selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched. Also provided are methods of making estolide-based grease products.

The present invention relates to a coating for high-temperature uses with tribological stress. The coating comprises a multi-layer system and a top lubricant layer, the top lubricant layer containing molybdenum as a main component.

The present disclosure relates to methods, systems, hydraulic fluids and additives for reducing the rate of surface current degradation for components in a hydraulic system, wherein the hydraulic system is exposed to phosphate-ester-based hydraulic fluid.

The present disclosure relates to methods, systems, hydraulic fluids and additives for reducing the rate of surface current degradation for components in a hydraulic system, wherein the hydraulic system is exposed to phosphate-ester-based hydraulic fluid.

A nanostructure that includes a multi-layered fullerene-like nano-structure composed of a plurality of layers each having a metal chalcogenide composition that has a molecular formula of MX.sub.2, in which M is a metallic element selected from the group consisting of titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), zirconium (Zr), niobium (Nb), molybdenum (Mo), technetium (Tc), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), cadmium (Cd), hafnium (Hf), tantalum (Ta), tungsten (W), rhenium (Re), osmium (Os), iridium (Ir), platinum (Pt), gold (Au), mercury (Hg) and combinations thereof, and X is a chalcogen element selected from the group consisting of sulfur (S), selenium (Se), tellurium (Te), oxygen (O) and combinations thereof. An outer layer of the multi-layered fullerene-like structure includes at least one sectioned portion that extends along a direction away from the curvature of the multi-layered fullerene-like nano-structure.

An organometallic chemistry-based compound for preventing coke formation in a hydrocarbon fluid system. The organometallic chemistry-based compound includes a coordination complex that interrupts an autoxidative pathway of coke formation. A component and a system for mitigating coke formation during delivery or circulation of a hydrocarbon fluid. The component includes a contact surface configured to be in contact with the hydrocarbon fluid. The contact surface is functionalized with an inhibitor ligand to form an inhibitor ligand-functionalized surface. The inhibitor ligand-functionalized surface interrupts an autoxidative pathway of coke formation.

A composition containing metal based nanoparticles (X), a polymer (Y), and a dispersion medium, the polymer (Y) being a vinyl polymer having a chain-like alkyl group having 10 to 28 carbon atoms and a nitrogen-containing heterocyclic group, the metal based nanoparticles (X) and the polymer (Y) being dispersed in the dispersion medium, the composition being used as an additive composition for a lubricating oil composition, an additive composition for a grease composition, a lubricating oil composition, or a grease composition.

The polymer (Y) is one or more kind selected from the group consisting of a polymer (Y1) that contains two or more kinds selected from the group consisting of a constitutional unit derived from the following monomer (ya), a constitutional unit derived from the following monomer (yb), and a constitutional unit derived from the following monomer (yc), and a polymer (Y2) that contains a constitutional unit derived from the following monomer (yb) and does not contain a constitutional unit derived from the following monomer (ya) and a constitutional unit derived from the following monomer (yc): monomer (ya): an olefin having 12 to 30 carbon atoms, monomer (yb): a vinyl monomer having a nitrogen-containing heterocyclic group, at least one hydrogen atom of which is substituted by a chain-like alkyl group having 12 to 30 carbon atoms, and monomer (yc): a vinyl monomer having a nitrogen-containing heterocyclic group, all hydrogen atoms of which are not substituted by a chain-like alkyl group having 12 to 30 carbon atoms.

A lubricating oil for hybrid engine includes a major amount of an oil of lubricating viscosity; a boron-containing compound in an amount to provide 50 to 300 ppm of boron to lubricating oil composition; an overbased calcium salicylate or a mixture of an overbased calcium sulfonate and overbased calcium salicylate individually having a total base number of greater than 150 mg KOH/g, measured by the method of ASTM D-2896, present in an amount that provides 800 ppm to 1800 ppm of calcium to the lubricating oil composition; zinc dithiophosphate (ZnDTP) in an amount to bring from 100 to 800 ppm of phosphorus to the lubricating oil composition; and a non-dispersant comb polymethacrylate (PMA) viscosity index improver (VII). The boron-containing compound includes a borated dispersant. The KV at 100 C. of the lubricating oil composition is from 6 cSt to 8.5 cSt, the KV at 40 C. of the lubricating oil composition is from 25 cSt to 35 cSt, and the VI of the lubricating oil composition is greater than 200.

A durable lubricating and cooling fluid for an electric motor system including an auxiliary pumping mechanism. The fluid includes a lubricating base oil, a sulfur system, a nitrogen system, and a phosphorous antiwear system. The lubricating and cooling fluid includes selected amounts of sulfur, nitrogen, and phosphorus provided by the system to provide acceptable wear and friction performance, electrical conductivity, and the ability to minimize wear loss of pumping components making the fluid suitable for use in electric motor system.