Alkylphenol detergents
OwnerEwan E. Delbridge, Patrick E. Mosier +1inventors
InventorsEwan E. Delbridge, Patrick E. Mosier, Peter Miatt
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Abstract
The disclosed technology provides a lubricating composition comprising an oil of lubricating viscosity and a detergent comprising a polyolefin-substituted hydroxy-aromatic carboxylic acid or salt thereof, wherein the polyolefin is derived from a branched alkene having at least 4 carbon atoms and wherein the polyolefin has a number average molecular weight of 150 to 800. The invention further relates to a method of lubricating a mechanical device with the lubricant composition.
Claims32
A lubricating composition comprising:
- (a) an oil of lubricating viscosity;
- and
- (b) a detergent consisting of an alkylsalicylate represented by the structure
- where R represent polyisobutylene having a number average molecular weight of 150 to 400 and wherein the detergent comprises up to 5 wt % of the lubricating composition.
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A method of forming a lubricating composition comprising:
- (i) forming an alkylsalicylate represented by the structure
- where R represents polyisobutylene having a number average molecular weight of 150 to 400 and wherein the detergent comprises up to 5 wt. % of the lubricating composition;
- (ii) optionally, reacting the alkylsalicylate with a metal base in the presence of carbon dioxide to form a metal salt;
- and
- (iii) combining the alkylsalicylate metal salt thereof with an oil of lubricating viscosity.
Dependencies are inferred from the claim text.