Back to results
US 5,338,470 AGranted
Alkylated citric acid adducts as antiwear and friction modifying additives
AssigneeMobil Oil Corporation
InventorsJohn Hiebert, Carleton N. Rowe, Leslie R. Rudnick
Life of this patent
Estimating the term…
Abstract
Alkylated citric acid derivatives obtained as a reaction product of citric acid and an alkyl alcohol or an amine have been found to be effective antiwear and friction modifying additives for fuels and lubricants.
Claims7
A composition comprising a major amount of an oil of lubricating viscosity or grease prepared therefrom and a minor multifunctional antioxidant/extreme pressure inhibiting amount of a product of reaction of;
- (1) a citric acid having the generalized structure:
- ##STR2## (2) an alkyl alcohol or an amine having the generalized structure
- nXRy
- where R is C1 to C200 hydrocarbyl or hydrocarbylene or a mixture thereof, and may optionally contain oxygen, nitrogen or sulfur, X is an amine, alcohol, thiol or a metal amide, alkoxide or thiolate, the metal is sodium, potassium, or calcium, and n is a number from 0.2 to 5.0.
1 more element
Dependencies are inferred from the claim text.