Antiwear system for improved copper corrosion
AssigneeAfton Chemical Corporation
InventorsBrandon Knouse, David Edwards, Magdalena Makowska
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Abstract
An oil-soluble phosphorus antiwear additive and a lubricating composition including the ashless antiwear additive having improved copper corrosion performance obtained by reacting an organic hydroxy compound with phosphorus pentasulfide to form a reaction product, distilling the reaction product and recovering a condensate, and reacting the condensate with an unsaturated ester of a carboxylic acid to form an oil-soluble phosphorus antiwear additive.
Claims28
A lubricating composition comprising:
- a majority of one or more base oils of lubricating viscosity;
- and
- an oil-soluble phosphorus antiwear additive made by a process comprising the steps of (a) reacting an organic hydroxy compound with phosphorus pentasulfide to form a reaction product;
- (b) distilling the reaction product and recovering a condensate;
- and (c) reacting the condensate with an unsaturated ester of a carboxylic acid to form the oil-soluble phosphorus antiwear additive.
A method of preparing an oil-soluble phosphorus antiwear additive, the method comprising:
- reacting an organic hydroxy compound with phosphorus pentasulfide to form a reaction product;
- distilling the reaction product and recovering a condensate therefrom;
- and
- reacting the condensate with an unsaturated ester of a carboxylic acid to form the oil-soluble phosphorus antiwear additive.
An oil-soluble phosphorus antiwear additive made by the process comprising the steps of (a) reacting an organic hydroxy compound with phosphorus pentasulfide to form a reaction product;
- (b) distilling the reaction product and recovering a condensate therefrom;
- and (c) reacting the condensate with an unsaturated ester of a carboxylic acid to form the oil-soluble phosphorus antiwear additive.
Dependencies are inferred from the claim text.