Lubricating Composition Containing an Ester of an Aromatic Carboxylic Acid

摘要

The invention provides a lubricating composition containing an oil of lubricating viscosity and an ester, thioester, amide or imide of a carboxylic acid compound where said carboxylic acid is characterized in that it is functionalized with a hydroxy-substituted aromatic moiety. The invention further relates to methods of lubricating an internal combustion engine by supplying the described lubricating composition to the internal combustion engine. The invention further relates to the use of the salt of the carboxylic acid compound as an antiwear agent or an antioxidant.

主权项

1. A lubricating composition comprising an oil of lubricating viscosity and an additive comprising an ester, thioester, amide, or imide of a carboxylic acid or any combination thereof wherein the carbonyl carbon of the acid is attached directly or through a divalent hydrocarbyl linkage to an aromatic moiety wherein said aromatic moiety includes two or more hydroxy-groups, alkoxy-groups, or mixtures thereof, with the proviso that if said aromatic moiety consists of a single ring, then no two hydroxy-groups, alkoxy-groups, or mixtures thereof are located on adjacent carbon atoms of said aromatic ring.