Oil-soluble phosphorus antiwear additives for lubricants
AssigneeEthylk Petroleum Additives, Inc.
InventorsAndrew G. Papay, Rolfe J. Hartley
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Abstract
Oil-soluble reaction products of inorganic phosphorus containing acids or anhydrides with a boron compound and ashless dispersants such as alkenyl succinimides are useful as antiwear/EP additives in lubricants.
Claims35
An oil-soluble lubricant additive composition comprising the reaction product of an inorganic phosphorus acid or anhydride, including partial and total sulfur analogs thereof, a boron compound, and an ashless dispersant which contains basic nitrogen and/or a hydroxyl group.
An oil-soluble lubricant additive concentrate comprising a major portion of the reaction product of an inorganic phosphorus acid or anhydride, including partial and total sulfur analogs thereof, a boron compound, and an ashless dispersant which contains basic nitrogen and/or a hydroxyl group and a minor portion of a diluent oil.
A lubricating oil composition comprising a major portion of an oil of lubricating viscosity and a minor portion of an oil soluble lubricant additive composition comprising the reaction product of an inorganic phosphorus acid or anhydride, including partial and total sulfur analogs thereof, a boron compound, and an ashless dispersant which contains basic nitrogen and/or a hydroxyl group.
A process for preparing an oil-soluble lubricant additive from an inorganic phosphorus acid or anhydride, including partial and total sulfur analogs thereof comprising heating a mixture of said acid or anhydride with a boron compound and an ashless dispersant which contains basic nitrogen and/or a hydroxyl group until a clear, oil-soluble solution is obtained.
Dependencies are inferred from the claim text.