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US 4,049,565 AGranted
Substituted maleimide lubricant additives and lubricant compositions made therewith
AssigneeMobil Oil Corporation
InventorsJohn C. Nnadi, Phillip S. Landis
Life of this patent
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Abstract
Additives that are useful dispersants when placed in lubricants are prepared by (1) reacting an amine or a hydroxy amino compound, such as an amino alcohol, with a halomaleic anhydride and (2) reacting this product with an alkali or alkaline earth metal derivative of a substituted hydroxyaromatic compound.
Claims18
A compound of the formula:
- ##STR14## wherein Q is hydrogen or R-AR-O wherein Ar is selected from the group consisting of phenyl, naphthyl, resorcinyl and anthryl, R is a polyalkylene group having a number average molecular weight of from 500 to 3000, only one Q being hydrogen, R' is hydrogen, alkyl, alkylene, aminoalkylene hydroxyalkyl, hydroxyalkylene, aryl, ##STR15## or alkyl-substituted aryl, q is 1 or 2 and M is oxygen.
A lubricant composition comprising a major proportion of an oil of lubricating viscosity or a grease thereof and a detergency amount of a compound of the formula:
- ##STR18## wherein Q is hydrogen or R-Ar-O wherein Ar is selected from the group consisting of phenyl, naphthyl, resorcinyl and anthryl, R is a polyalkylene group having a number average molecular weight of from 500 to 3000, only one Q being hydrogen, R' is hydrogen, alkyl, alkylene, aminoalkylene hydroxyalkyl, hydroxyalkylene, aryl, ##STR19## or alkyl-substituted aryl, q is 1 or 2 and M is oxygen.
Dependencies are inferred from the claim text.