Two-cycle engine oils containing alkyl phenols
AssigneeThe Lubrizol Corporation
InventorKirk E. Davis
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Abstract
Lubricating oils are described which are useful in two-cycle engines. These oils contain a minor amount of at least one phenolic compound of the general formula (R).sub.a --Ar--(OH).sub.b wherein R is a substantially saturated, hydrocarbon-based group of an average of at least 10 aliphatic carbon atoms; a and b are each independently an integer of one up to three times the number of aromatic nuclei present in Ar with the proviso that the sum of a and b does not exceed the unsatisfied valences of Ar; and Ar is a single ring, a fused ring or a linked polynuclear moiety having 0 to 3 optional substituents consisting of lower alkyl, lower alkoxyl, methylol or lower hydrocarbon-based substituted methylol, halo and combinations of two or more of said optional substituents.
Claims26
A lubricant composition for two-cycle engines comprising a major amount by weight of at least one oil of lubricating viscosity and a minor amount, sufficient to control piston ring sticking and promote general engine cleanliness, of
- (A) at least one phenolic compound of the formula
- (R).sub.a --Ar--(OH).sub.b
- wherein R is a substantially saturated hydrocarbon-based group of an average at least 10 aliphatic carbon atoms;
- a and b are each independently an integer of one up to three times the number of aromatic nuclei present in Ar with the proviso that the sum of a and b does not exceed the unsatisfied valences of Ar;
- and Ar is a single ring, a fused or a linked polynuclear ring aromatic moiety having 0 to 3 optional substituents selected from the group consisting of lower alkyl, lower alkoxyl, halo and combinations of two or more of said optional substituents.
A lubricant composition for two-cycle engines comprising a major amount by weight of at least one oil of lubricating viscosity and a minor amount, sufficient to control piston ring sticking and promote general engine cleanliness, of
- (A) at least one phenolic compound of the formula
- (R).sub.a --Ar--(OH).sub.b
- wherein R is a substantially saturated hydrocarbon-based group of an average of at least 10 aliphatic carbon atoms;
- a and b are each independently an integer of one up to three times the number of aromatic nuclei present in Ar with the proviso that the sum of a and b does not exceed the unsatisfied valences of Ar;
- and Ar is a single ring, a fused ring or a linked polynuclear aromatic moiety having 0 to 3 optional substituents selected from the group consisting of lower alkyl, lower alkoxyl, halo and combinations of two or more of said optional substituents;
- and
- (B) at least one detergent-dispersant selected from the group consisting of
- i. at least one neutral or basic metal salt of an organic sulfur acid, phenol or carboxylic acid;
- ii. at least one hydrocarbyl-substituted amine wherein the hydrocarbyl substituent is substantially aliphatic and contains at least 12 carbon atoms;
- iii. at least one acylated, nitrogen-containing compound having a substituent of at least 10 aliphatic carbon atoms made by reacting a carboxylic agant with at least one amino compound containing at least one
- --NH--
- group, said acylating agent being linked to said amino compound through an imido, amido, amidine, or acyloxy ammonium linkage;
- iv. at least one nitrogen-containing condensate of a phenol, aldehyde and amino compound having at least one
- --NH--
- group;
- and
- v. at least one ester of a substituted polycarboxylic acid.
Dependencies are inferred from the claim text.