N-N'-dihydrocarbyl substituted phenylene diamine-derived condensation products as antioxidants and lubricant compositions
AssigneeMobil Oil Corporation
InventorsLiehpao O. Farng, Andrew G. Horodysky
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Abstract
N-N'-dihydrocarbyl substituted phenylenediamine-derived Mannich-type condensation products are effective antioxidants for lubricants.
Claims60
A composition comprising a major amount of an oil of lubricating viscosity or grease or other solid lubricant prepared therefrom and a minor multifunctional antioxidant/corrosion inhibiting amount of the product of reaction of (1) a N,N-dihydrocarbyl substituted phenylenediamine having the following generalized structure:
- ##STR3## (2) an aldehyde or ketone having the following generalized structure:
- ##STR4## and (3) an aliphatic amine having the following generalized structure:
- ##STR5## where R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 are hydrogen or C.sub.1 to C.sub.60 hydrocarbyl, or oxygen, sulfur, nitrogen containing C.sub.2 to about C.sub.60 hydrocarbyl or mixtures thereof.
A product of reaction made by reacting (1) a N,N'-dihydrocarbyl substituted phenylenediamine, (2) an aldehyde or ketone and (3) an aliphatic amine at temperatures varying from ambient or about 50.degree. C. to about 250.degree. C. or reflux and pressure varying from atmospheric or slightly higher in molar, less than molar or greater than molar quantites of (1), (2), and/or (3).
A process of preparing an addive product of reaction comprising reacting (1) a N,N'-dihydrocarbyl substituted phenylenediamine (2) an aldehyde or ketone and (3) an aliphatic amine, in less than molar, molar or more than molar quantities of amine or diamine at temperatures varying from ambient to about 250.degree. C. or reflux, at pressures varying from about ambient to slightly higher for a time sufficient varying from 0.5 to 12 hours or more.
Dependencies are inferred from the claim text.