Phenolic imidazoline antioxidants
AssigneeMobil Oil Corporation
InventorsHalou Oumar-Mahamat, Andrew G. Horodysky
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Abstract
Phenolic imidazolines prepared via one-step condensation of hydrocarbylpolyamino-phenols and carbonyl generating species have been found to be effective antioxidants in lubricant applications. These additives are derived from a one-step reaction using low cost phenolic amines and carbonyl compounds. In addition to their antioxidant activity, they are, because of the presence of the cyclic imidazoline groups, also expected to exhibit corrosion inhibiting and metal passivating activity.
Claims13
An improved lubricant composition comprising a major proportion of an oil of lubricating viscosity or grease prepared therefrom comprising a liquid hydrocarbon and a minor amount of a multifunctional antiwear, antioxidant, anticorrosion, metal passivating, additive product of reaction prepared by (a) reacting a alkylated phenolic ethylene polyamine with (b) an aromatic aldehyde or ketone wherein the reaction is carried out in molar ratios of reactants varying from equimolar to more than equimolar to less than equimolar at temperatures varying from ambient to about 250.degree. C. or reflux, under pressures varying from ambient or autogenous to about 500 psi for a time sufficient to obtain a phenolic imidazolidine derived additive product of reaction.
A process for preparing a multifunctional antiwear, antioxidant, anticorrosion, metal passivating, additive product of reaction which is prepared by (a) reacting a alkylated phenolic ethylene polyamine with (b) an aromatic aldehyde or ketone, wherein the reaction is carried out in molar ratios of reactants varying from equimolar to more than equimolar to less than equimolar at temperatures varying from ambient to about 250.degree. C. or reflux, under pressures varying from ambient or autogenous to about 500 psi for a time sufficient to obtain a phenolic imidazolidine derived additive product of reaction.
A multifunctional antiwear, antioxidant, anticorrosion, metal passivating, additive product of reaction which is prepared by (a) reacting a alkylated phenolic ethylene polyamine with (b) an aromatic aldehyde or ketone wherein the reaction is carried out in molar ratios of reactants varying from equimolar to more than equimolar to less than equimolar at temperatures varying from ambient to about 250.degree. C. or reflux, under pressures varying from ambient or autogenous to about 500 psi for a time sufficient to obtain a phenolic imidazolidine derived additive product of reaction.
Dependencies are inferred from the claim text.