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US 2006/0223724 A1Published application
Lubricating oil composition with reduced phosphorus levels
OwnerVincent Gatto, William Moehleinventors
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Abstract
This invention is generally related to a low phosphorus lubricant for an internal combustion engine that provides superior deposit control while still retaining excellent viscosity control.
Claims44
A low phosphorus engine oil comprising:
- 4,4′-methylenebis(2,6-di-tert-butylphenol) and
- an alkylated diphenylamine;
- wherein
- the weight ratio of 4,4′-methylenebis(2,6-di-tert-butylphenol) to said alkylated diphenylamine is greater than or equal to about 0.5;
- and
- said engine oil produces less than or equal to 35 mg of total deposits according to a ASTM D7097 measurement.
3 more elements
A composition comprising:
- (a) a major amount of oil of lubricating viscosity selected from the group consisting of Group II, Group III, Group IV and synthetic ester base stocks;
- (b) 4,4′-methylenebis(2,6-di-tert-butylphenol);
- (c) an alkylated diphenylamine;
- (d) at least one component selected from the group consisting of dispersants and detergents;
- and
- (e) a zinc dialkyldithiophosphate;
- wherein
- said composition comprises about 600 ppm or less of phosphorus derived from said zinc dialkyldithiophosphate;
- and
- the weight ratio of (b) to (c) is greater than or equal to about 0.5.
7 more elements
A composition comprising:
- (a) a major amount of oil of lubricating viscosity selected from the group consisting of Group II, Group III, Group IV and synthetic ester base stocks;
- (b) 4,4′-methylenebis(2,6-di-tert-butylphenol);
- (c) an alkylated diphenylamine;
- (e) a zinc dialkyldithiophosphate;
- and
- (f) an oil soluble organomolybdenum compound;
- wherein:
- the weight ratio of (b) to (c) is greater than or equal to about 0.5;
- and said composition produces less than or equal to about 35 mg of total deposits according to a ASTM D7097 measurement.
6 more elements
A composition comprising:
- (a) a major amount of oil of lubricating viscosity selected from the group consisting of Group II, Group III, Group IV and synthetic ester base stocks;
- (b) 4,4′-methylenebis(2,6-di-tert-butylphenol);
- and
- (c) an alkylated diphenylamine;
- (d) at least one component selected from the group consisting of dispersants and detergents;
- (e) a zinc dialkyldithiophosphate;
- (f) an oil soluble organomolybdenum compound;
- and
- (g) a hindered phenolic antioxidant with the proviso that said hindered phenolic antioxidant is not 4,4′-methylenebis(2,6-di-tert-butylphenol);
- wherein said composition comprises:
- about 600 ppm or less of phosphorus derived from said zinc dialkyldithiophosphate;
- and
- about 50-400 ppm of molybdenum derived from said oil soluble organomolybdenum compound.
10 more elements
An engine oil comprising:
- (a) a major amount of oil of lubricating viscosity selected from the group consisting of Group II, Group III, Group IV and synthetic ester base stocks;
- (b) 4,4′-methylenebis(2,6-di-tert-butylphenol);
- (c) 0.2 to 1.0 wt % of an alkylated diphenylamine;
- (d) 1.0 to 12.0 wt % of at least one compound selected from the group consisting of dispersants and detergents;
- (e) 200 to 600 ppm of phosphorus derived from zinc dialkyldithiophosphate;
- and
- (f) 50 to 400 ppm of molybdenum derived from an oil soluble organomolybdenum compound;
- wherein the weight ratio of (b) to (c) is greater than or equal to 0.5.
5 more elements
An engine oil comprising:
- (a) a major amount of oil of lubricating viscosity selected from the group consisting of Group II, Group III, Group IV and synthetic ester base stocks;
- (b) 0.1 to 1.5 wt % 4,4′-methylenebis(2,6-di-tert-butylphenol);
- (c) an alkylated diphenylamine;
- (d) 1.0 to 12.0 wt % of at least one compound selected from the group consisting of dispersants and detergents;
- (e) 200 to 600 ppm of phosphorus derived from zinc dialkyldithiophosphate;
- and
- (f) 50 to 400 ppm of molybdenum derived from an oil soluble organomolybdenum compound;
- wherein the weight ratio of (b) to (c) is greater than or equal to 0.5.
5 more elements
An engine oil comprising:
- (a) a major amount of oil of lubricating viscosity selected from the group consisting of Group II, Group III, Group IV and synthetic ester base stocks;
- (b) 4,4′-methylenebis(2,6-di-tert-butylphenol);
- (c) 0.2 to 1.0 wt % of an alkylated diphenylamine, and
- (d) 1.0 to 12.0 wt % of at least one compound selected from the group consisting of dispersants and detergents, and
- (e) 300 to 600 ppm of phosphorus derived from zinc dialkyldithiophosphate;
- wherein the weight ratio of (b) to (c) is greater than or equal to 0.5.
3 more elements
An engine oil comprising:
- (a) a major amount of oil of lubricating viscosity selected from the group consisting of Group II, Group III, Group IV and synthetic ester base stocks;
- (b) 0.1 to 1.5 wt % 4,4′-methylenebis(2,6-di-tert-butylphenol);
- (c) an alkylated diphenylamine;
- (d) 1.0 to 12.0 wt % of at least one compound selected from the group consisting of dispersants and detergents, and
- (e) 300 to 600 ppm of phosphorus derived from zinc dialkyldithiophosphate;
- wherein the weight ratio of (b) to (c) is greater than or equal to 0.5.
3 more elements
Dependencies are inferred from the claim text.