Lubricant compositions comprising triazole-derived acid-esters or ester-amide-amine salts as antiwear additives
AssigneeMobil Oil Corporation
InventorsLiehpao O. Farng, Andrew G. Horodysky, Ronald J. Poole, John R. Donofrio
Life of this patent
Estimating the term…
Abstract
Organic triazole-derived carboxylic acid-esters, and ester-amide-amine salts have been found to be effective antiwear additives for lubricants.
Claims12
An improved lubricant composition comprising a major proportion of an oil of lubricating viscosity or grease prepared therefrom and a minor multifunctional antiwear, load-carrying/EP, and copper corrosion inhibiting proportion of an additive product of reaction prepared by reacting (1) a triazole or hydrocarbyl substituted triazole with a hydrocarbyl oxide to form a triazole-derived alcohol and thereafter (2) reacting said triazole-derived alcohol with a hydrocarbyl carboxylic anhydride or its acid equivalent selected from succinic or phthalic anhydrides or hydrocarbyl substituted succinic or phthalic anhydrides or their acid equivalents to produce substituted hydrocarbyl carboxylic acidester derivativies and (3) converting said acid-ester derivatives to their corresponding diester, amide-ester salts by reaction with amine, hydroxy or hydroxyamine compounds and wherein the reactions are carried out at temperatures varying from ambient to about 250.degree. C. under ambient or autogenous pressures, in molar ratios of reactants varying from equimolar to more than molar to less than molar for times sufficient to obtain the desired additive product of reaction.
A process of preparing a multifunctional antiwear, corrosion inhibiting, rust inhibiting and thermal color stabilizing additive product prepared by reacting (1) a triazole or hydrocarbyl substituted triazole with a hydrocarbyl oxide to form a triazole-derived alcohol and thereafter (2) reacting said triazole-derived alcohol with a hydrocarbyl carboxylic anhydride or its acid equivalent selected from succinic or phthalic anhydrides or hydrocarbyl substituted succinic or phthalic anhydrides or their acid equivalents to produce substituted hydrocarbyl carboxylic acid-ester derivatives and (3) converting said acid-ester derivatives to their corresponding diester, amide-ester salts by reaction with amine or hydroxy compounds and wherein the reactions are carried out at temperatures varying from ambient to about 250.degree. C. under ambient or autogenous pressures, in molar ratios of reactants varying from equimolar to more than molar to less than molar for times sufficient to obtain the desired additive product of reaction.
A multifunctional antiwear, copper corrosion inhibiting, and load-carrying/EP additive product of reaction prepared by reacting (1) a triazole or selected from succinic or phthalic anhydrides or hydrocarbyl substituted succinic or phthalic anhydrides or their acid equivalents substituted triazole with a hydrocarbyl oxide to form a triazole-derived alcohol and thereafter (2)reacting said triazole-derived alcohol with a hydrocarbyl carboxylic anhydride or its acid equivalent to product substituted hydrocarbyl carboxylic acid-ester derivatives and (3) converting said acid-ester derivatives to their corresponding diester, amide-ester salts by reaction with amine or hydroxy or hydroxyamine compounds wherein the reactions are carried out at temperatures varying from ambient to about 250.degree. C. under ambient or autogenous pressures, in molar ratios of reactants varying from equimolar to more than molar to less than molar for times sufficient to obtain the desired additive product of reaction.
Dependencies are inferred from the claim text.