ENGINE OIL COMPOSITION

• US 20190330552A1
• Filed: 01/22/2018
• Published: 10/31/2019
• Est. Priority Date: 01/24/2017
• Status: Active Grant

• Current Assignee: Adeka Corporation
• Original Assignee: Adeka Corporation
• Inventors: SUMI, Taro, IINO, Shinji
• Granted Patent: US 11,118,128 B2
• Time in Patent Office: Days
• CPC Class Codes: C10M 135/18 thiocarbamic type, e.g. containing the groups
• CPC Class Codes: C10M 169/04 Mixtures of base-materials and additives
• CPC Class Codes: C10M 2219/068 Thiocarbamate metal salts
• 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 2030/06 Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2030/54 Fuel economy
• CPC Class Codes: C10N 2040/25 Internal-combustion engines
• CPC Class Codes: C10N 2040/252 Diesel engines
• CPC Class Codes: C10N 2040/255 Gasoline engines

Abstract

A fuel-saving-type engine oil composition is provided that exhibits a satisfactory friction-reducing effect in a low-viscosity engine oil without being constrained by, for example, high temperatures, low temperatures, low loads, or high loads. The engine oil composition includes: an engine oil having a low-temperature viscosity of from 0 to 10 in SAE viscosity grades and a high-temperature viscosity of from 4 to 20 in the SAE viscosity grades; and a molybdenum compound (A) represented by the following general formula (1):

where R¹ to R⁴ each independently represent a hydrocarbon group having 4 to 18 carbon atoms, and not all of R¹ to R⁴ represent the same group, and when R¹ and R² represent the same group, R³ and R⁴ do not represent the same group, and X¹ to X⁴ each independently represent a sulfur atom or an oxygen atom.

Claims

1-9. -9. (canceled)

10. An engine oil composition, comprising:

an engine oil having a low-temperature viscosity of from 0 to 10 in SAE viscosity grades and a high-temperature viscosity of from 4 to 20 in the SAE viscosity grades; and

a molybdenum compound (A) represented by the following general formula (1);

11. The engine oil composition according to claim 10, further comprising a molybdenum compound (B) represented by the following general formula (2):

12. The engine oil composition according to claim 10, wherein a molybdenum content in the engine oil composition is from 50 ppm by mass to 5,000 ppm by mass.

13. The engine oil composition according to claim 11, wherein a molybdenum content in the engine oil composition is from 50 ppm by mass to 5,000 ppm by mass.

14. A method of reducing a coefficient of friction of an engine oil, comprising adding an additive for an engine oil containing a molybdenum compound (A) represented by the following general formula (1) to an engine oil having a low-temperature viscosity of from 0 to 10 in SAE viscosity grades and a high-temperature viscosity of from 4 to 20 in the SAE viscosity grades: