FUEL EFFICIENT LUBRICATING OILS

• US 20150133352A1
• Filed: 06/05/2013
• Published: 05/14/2015
• Est. Priority Date: 06/06/2012
• Status: Active Grant

• Current Assignee: Vanderbilt Chemicals, LLC
• Original Assignee: Vanderbilt Chemicals, LLC
• Inventors: Esche, Carl K., Mazzamaro, Glenn A., Bartels, Thorsten, Gray, David B.
• Granted Patent: US 9,677,024 B2
• Time in Patent Office: Days
• US Class Current: 508/294
• CPC Class Codes: C10M 107/00 Lubricating compositions characterised by the base-material being a macromolecular compound
• CPC Class Codes: C10M 149/10 containing monomers having an unsaturated radical bound to a nitrogen-containing hetero ring
• CPC Class Codes: C10M 161/00 Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential
• CPC Class Codes: C10M 2201/06 Metal compounds of chromium C10M2201/086
• CPC Class Codes: C10M 2203/1025 used as base material
• CPC Class Codes: C10M 2205/04 containing aromatic monomers, e.g. styrene
• CPC Class Codes: C10M 2207/144 containing hydroxy groups
• CPC Class Codes: C10M 2207/289 containing free hydroxy groups
• CPC Class Codes: C10M 2209/084 Acrylate; Methacrylate
• CPC Class Codes: C10M 2209/086 polycarboxylic, e.g. maleic acid
• CPC Class Codes: C10M 2215/064 Di- and triaryl amines
• CPC Class Codes: C10M 2215/22 Heterocyclic nitrogen compounds
• CPC Class Codes: C10M 2215/223 Five-membered rings containing nitrogen and carbon only
• CPC Class Codes: C10M 2215/28 Amides; Imides
• CPC Class Codes: C10M 2217/02 Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C10M 2217/024 containing monomers having an unsaturated radical bound to an amido or imido group
• CPC Class Codes: C10M 2217/028 containing monomers having an unsaturated radical bound to a nitrogen-containing hetero ring
• CPC Class Codes: C10M 2219/046 Overbasedsulfonic acid salts
• CPC Class Codes: C10M 2219/066 Thiocarbamic type compounds
• CPC Class Codes: C10M 2219/068 Thiocarbamate metal salts
• CPC Class Codes: C10M 2223/045 : Metal containing thio derivatives
• CPC Class Codes: C10M 2227/066 : derived from Mo or W
• CPC Class Codes: C10N 2010/04 : Groups 2 or 12
• CPC Class Codes: C10N 2010/12 : Groups 6 or 16
• CPC Class Codes: C10N 2020/02 : Viscosity; Viscosity index
• CPC Class Codes: C10N 2030/02 : Pour-point; Viscosity index
• CPC Class Codes: C10N 2030/04 : Detergent property or dispersant property
• CPC Class Codes: C10N 2030/08 : Resistance to extreme temperature
• CPC Class Codes: C10N 2030/10 : Inhibition of oxidation, e.g. anti-oxidants
• CPC Class Codes: C10N 2030/54 : Fuel economy
• CPC Class Codes: C10N 2030/68 : Shear stability
• CPC Class Codes: C10N 2040/25 : Internal-combustion engines

Abstract

The present invention relates to an engine oil lubricant composition for use in internal combustion engines comprising one or more molybdenum containing compounds that deliver 1-1000 ppm molybdenum to the finished oil, one or more phosphorus containing compounds that deliver 25-650 ppm phosphorus to the finished oil, and one or more poly(meth)acrylate viscosity index improvers (VI improvers) that may or may not be functionalized, for improved fuel economy and turbocharger related deposits. In addition, the composition comprises an antioxidant system which is carefully balanced to provide improved fuel economy, comprising an aminic antioxidant, a phenolic antioxidant and an ashless dithiocarbamate. Additionally, the formulated oil may contain a dispersant poly(meth)acrylate, in addition to the PAMA VI improver, to reduce the amount of traditional succinimide dispersants.

Claims

1. A lubricating composition comprising:

(A) 1% by weight to 15% by weight of one or more polyalkyl(meth)acrylate(s) comprising monomer units of;

(a) 0 to 40% by weight of one or more ethylenically unsaturated ester compounds of the formula (I)

2. The composition according to claim 1, wherein the vinyl monomer (d) is selected from the group consisting of styrene and substituted styrenes.

3. The composition according to claim 1, wherein the N-dispersant monomer (e) is selected from the group consisting of N-vinylic monomers, (meth)acrylic esters, (meth)acrylic amides and (meth)acrylic imides.

4. The composition according to claim 1, wherein the N-dispersant monomer (e) is of the formula (IV)

5. The composition according to claim 1, wherein the N-dispersant monomer (e) is selected from the group consisting of vinyl substituted nitrogen heterocyclic monomers, N-vinyl-substituted nitrogen heterocyclic monomers, dialkylaminoalkyl acrylate and methacrylate monomers, dialkylaminoalkyl acrylamide and methacrylamide monomers, N-tertiary alkyl acrylamides and corresponding methacrylamides, vinyl substituted amines, and N-vinyl lactams.

6. The composition according to claim 1, wherein the N-dispersant monomer (e) is selected from the group consisting of N-vinyl pyrrolidinone and N,N-dimethylaminoethyl methacrylate, N,N-dimethylaminopropyl methacrylamide.

7. The composition according to claim 1, wherein the organomolybdenum compound comprises one or both of (a) the reaction product of about 1 mole of fatty oil, about 1.0 to 2.5 moles of diethanolamine and a molybdenum source sufficient to yield about 0.1 to 12.0 percent of molybdenum based on the weight of the complex at elevated temperatures, comprising at least some compounds having the structural formulae (VIa) or (VIb)

8. The composition according to claim 7, wherein the fatty oil residue is a glyceryl ester of higher fatty acids containing at least 22 carbon atoms.

9. The composition according to claim 8, wherein the glyceryl ester is selected from the group consisting of vegetable oils and animal oils.

10. The composition according to claim 9, wherein the vegetable oil is derived from coconut, corn, cottonseed, linseed, peanut, soybean or sunflower seed.

11. The composition according to claim 9, wherein the animal fatty oil is tallow.

12. The composition according to claim 1, wherein the phosphorus containing compound is selected from the group consisting of zinc dialkyldithiophosphate (ZDDP) compositions that include one or more ZDDP compounds.

13. The composition according to claim 1, wherein the base oil is selected from the group consisting of API group I, II, III, IV or V oils.

14. (canceled)

15. (canceled)

16. A lubricant composition comprising:

(A) 1% by weight to 15% by weight of one or more polyalkyl(meth)acrylate(s) comprising monomer units of;

(a) 0 to 40% by weight of one or more ethylenically unsaturated ester compounds of the formula (I)

17. The lubricant composition of claim 16, comprising:

as the one or more organomolybdenum compounds, both of (a) a compound formed as the reaction product of (a) the reaction product of about 1 mole of fatty oil, about 1.0 to 2.5 moles of diethanolamine and a molybdenum source sufficient to yield about 0.1 to 12.0 percent of molybdenum based on the weight of the complex at elevated temperatures, comprising at least some compounds having the structural formulae (VIa) or (VIb)

18. The lubricant composition of claim 17, further comprising:

a metal detergent, calcium sulfonate

a dispersant, bis-succinimide dispersant

a pour point depressant, a poly(meth)acrylate, and

a corrosion inhibitor, tolutriazole