Back to results
US 3,983,041 AGranted
Rust inhibitor for mono- or polyurea greases
AssigneeChevron Research Company
InventorAndrew D. Abbott
Life of this patent
Estimating the term…
Abstract
An improved grease composition is disclosed and comprises a novel combination of a Mannich base, a poly- or monourea thickener and an alkaline earth metal carbonate or carboxylate within a lubricating oil. The Mannich base is prepared by reacting formaldehyde, alkylphenol and an amine selected from dialkanolamine, N,N-dialkanol-alkylenediamine and alkylamine.
Claims12
A grease composition comprising:
- (1) a major portion of an oil of lubricating viscosity;
- (2) from 0.5 to 20 weight percent of a water- and oil-insoluble mono- or polyurea thickening agent having a molecular weight between about 350 and 2500;
- (3) from 3 to 30 weight percent of an alkaline earth metal carbonate or aliphatic monocarboxylate having from 1 to 3 carbons;
- and (4) from 0.1 to 10 weight percent of a Mannich base prepared by reacting alkylphenol having from 1 to 4 carbon atoms in the alkyl groups with formaldehyde and an amine selected from the class consisting of dialkanolamine, N,N-dialkanolalkylenediamine and dialkylamine.
1 more element
A grease composition comprising:
- (1) a major portion of an oil of lubricating viscosity;
- (2) from 0.5 to 20 weight percent of a mono- or polyurea thickener prepared by reacting
- a. a diisocyanate having the formula ONC--R--CNO, wherein R is a hydrocarbylene having from 2 to 30 carbons;
- b. a polyamine having the formula ##STR12## wherein R.sup.o is selected from the group consisting of hydrogen, a C.sub.1 -C.sub.4 alkyl or mixtures thereof;
- R.sup.1 and R.sup.2 are the same or different type of hydrocarbylene having from 18 to 20 carbons;
- x is an integer from 0 to 2;
- z is an integer from 0 to 1;
- and y is an integer equal to 1 when z is 0 and 0 when z is 1;
- c. a monofunctional compound selected from the group consisting of C.sub.1 -C.sub.30 monoisocyanate, C.sub.1 -C.sub.30 monoamines or mixtures thereof;
- 3. from 3 to 30 weight percent of an alkaline earth metal aliphatic monocarboxylate having from 1 to 3 carbons;
- and (4) from 0.1 to 10 weight percent of a Mannich base prepared by reacting cresol with formaldehyde and an amine selected from the class consisting of diethanolamine, N-N-diethanolalkylenediamine and diethylamine.
8 more elements
Dependencies are inferred from the claim text.