US 4,740,321 AGranted

Two-cycle engine oils containing sulfurized alkyl phenols

AssigneeThe Lubrizol Corporation

InventorsKirk E. Davis, William C. Ward, Jr.

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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, or salts thereof, 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 linked polynuclear moiety wherein the bridging linkages are sulfur-containing moieties, 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.

Claims52

Dependent claims

A lubricant composition for two-cycle engines consisting essentially of 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 at least one phenolic compound (A) selected from the group consisting of

(A-1) (R).sub.a --Ar--(OH).sub.b, (I) or
(A-2) a neutral or basic metal salt of (I) wherein the metal is selected from the group consisting of alkali metal, magnesium and calcium, or
(A-3), mixtures of (A-1) and (A-2)
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 linked polynuclear ring aromatic moiety wherein bridging linkages are selected from the group consisting of sulfide linkages, polysulfide linkages, lower alkylene sulfur linkages and loer alkylene polysulfide linkages, 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.

3 more elements

(A-1) (R).sub.a --Ar--(OH).sub.b, (I) or
(A-2) a neutral or basic metal salt of (I) wherein the metal is selected from the group consisting of alkali metal, magnesium and calcium, or
(A-3), mixtures of (A-1) and (A-2)
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 linked polynuclear aromatic moiety wherein bridging linkages are selected from the group consisting of sulfide linkages, polysulfide linkages, lower alkylene sulfur linkages and lower alkylene polysulfide linkages, 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, a phenol, other than a sulfurized phenol, or a 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 agent 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.

15 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/850,315Filed 10 Apr 1986 · continuation in part
Priority: 7 Jun 1982
Granted: 26 Apr 1988
Term ends: Not estimatedThe source records don’t support an estimate.

Classification36 codes

C10M 141/00
Lubricating compositions characterised by the additive being a mixture of two or
C07C 37/14
By reactions increasing the number of carbon atoms: by addition reactions, i.e. reactions involving at least one carbon-to-carbon unsaturated bond
C07C 43/1782
Containing hydroxy or O-metal groups: containing six-membered aromatic rings
C08F 8/00
Chemical modification by after-treatment