Lubricating oil compositions containing pre-ceramic polymers
AssigneeInfineum International Limited
InventorsNigel A. Male, Stuart A. Taylor, Russell M. Thompson, Anton Coulthurst
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Abstract
A lubricating composition comprises an oil of lubricating viscosity, a metal-free pre-ceramic polymer and one or more co-additives. The metal-free pre-ceramic polymer comprises a plurality of repeat units which do not contain oxygen. The pre-ceramic polymers provide the lubricating oil composition with antiwear properties. Also described is a method of lubricating an internal combustion engine and the use of a lubricating oil composition containing a pre-ceramic polymers to inhibit wear in an internal combustion engine.
Claims21
A lubricating oil composition comprising a major amount of an oil of lubricating viscosity and a minor amount of a metal-free pre-ceramic polymer, wherein the pre-ceramic polymer comprises a plurality of repeat units which do not contain oxygen, and wherein the lubricating oil composition further comprises one or more co-additives.
A lubricating oil composition according to claim 18 wherein the one or more co-additives comprises a zinc dihydrocarbyl dithiophosphate in an amount sufficient to provide from greater than 800 ppm to 1200 ppm by mass of phosphorous to the lubricating oil composition, based upon the total mass of the lubricating oil composition, and as measured in accordance with ASTM D5185.
Dependencies are inferred from the claim text.