LUBRICATING OIL COMPOSITION AND METHOD FOR PRODUCING SAME

• US 20170158982A1
• Filed: 12/02/2016
• Published: 06/08/2017
• Est. Priority Date: 12/07/2015
• Status: Abandoned Application

• Current Assignee: Idemitsu Kosan Company Limited, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Idemitsu Kosan Company Limited, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: ITO, Koki, KANEKO, Toyoharu, YAMAMORI, Kazuo, TAMURA, Kazushi
• Application Number:
  US15/367,765
• Publication Number:
  US 20170158982A1
• Time in Patent Office: Days
• CPC Class Codes: C10M 135/18 thiocarbamic type, e.g. containing the groups
• CPC Class Codes: C10M 163/00 Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
• CPC Class Codes: C10M 169/04 Mixtures of base-materials and additives
• CPC Class Codes: C10M 2201/087 Boron oxides, acids or salts
• CPC Class Codes: C10M 2203/1006 used as base material
• CPC Class Codes: C10M 2203/1025 used as base material
• CPC Class Codes: C10M 2207/023 having hydroxy groups bound to carbon atoms of six-membered aromatic rings
• CPC Class Codes: C10M 2207/026 with tertiary alkyl groups
• CPC Class Codes: C10M 2207/262 derived from hydroxy substituted aromatic acids, e.g. salicylates
• CPC Class Codes: C10M 2207/28 Esters epoxidised esters C10M2207/24
• CPC Class Codes: C10M 2207/283 of polyhydroxy compounds
• CPC Class Codes: C10M 2209/084 Acrylate; Methacrylate
• CPC Class Codes: C10M 2215/02 Amines, e.g. polyalkylene polyamines; Quaternary amines polyalkylene polyamines with eleven or more monomer units C10M2217/046
• CPC Class Codes: C10M 2215/04 having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2215/06 having amino groups bound to carbon atoms of six-membered aromatic rings
• CPC Class Codes: C10M 2215/064 Di- and triaryl amines
• CPC Class Codes: C10M 2215/08 Amides
• CPC Class Codes: C10M 2215/086 Imides
• CPC Class Codes: C10M 2215/223 Five-membered rings containing nitrogen and carbon only
• CPC Class Codes: C10M 2215/26 Amines
• CPC Class Codes: C10M 2215/28 : Amides; Imides
• CPC Class Codes: C10M 2219/044 : Sulfonic acids, Derivatives thereof, e.g. neutral salts
• 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 2227/00 : Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
• CPC Class Codes: C10M 2227/061 : Esters derived from boron
• 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 2030/06 : Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2030/10 : Inhibition of oxidation, e.g. anti-oxidants
• CPC Class Codes: C10N 2030/44 : Boron free or low content boron compositions
• CPC Class Codes: C10N 2030/45 : Ash-less or low ash content
• CPC Class Codes: C10N 2030/52 : Base number [TBN]
• 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
• CPC Class Codes: C10N 2060/14 : by boron or a compound containing boron

Abstract

The lubricating oil composition of the present invention is a lubricating oil composition containing a lubricating base oil, a metal-based detergent, a molybdenum dialkyldithiocarbamate compound, and a boron-containing compound, wherein the metal-based detergent contains a calcium salicylate and at least one selected from the group consisting of a calcium sulfonate and a magnesium-based detergent; the lubricating oil composition arbitrarily contains an ashless friction modifier; the content of a calcium atom is 0.12 to 0.16 mass % on the basis of the whole amount of the lubricating oil composition; the content of a molybdenum atom is 0.05 to 0.10 mass % on the basis of the whole amount of the lubricating oil composition; and a predetermined coefficient X is less than 0.050.

Claims

1. A lubricating oil composition comprising:

a lubricating base oil, a metal-based detergent, a molybdenum dialkyldithiocarbamate compound, and a boron-containing compound, wherein

the metal-based detergent contains

a calcium salicylate and

at least one selected from the group consisting of a calcium sulfonate and a magnesium-based detergent,

the lubricating base oil arbitrarily contains an ashless friction modifier,

in the lubricating oil composition, the content of a calcium atom is 0.12 to 0.16 mass % on the basis of the whole amount of the lubricating oil composition;

and the content of a molybdenum atom is 0.05 to 0.10 mass % on the basis of the whole amount of the lubricating oil composition, and

X calculated according to the following expression (1) is less than 0.050;

X=3.8×

10<sup>−

2</sup>−

2.7×

10<sup>−

4</sup>×

[A]−

4.2×

10<sup>−

1</sup>×

[B]+5.4×

10<sup>−

1</sup>×

[C]−

5.2×

10<sup>−

3</sup>×

[D]+7.3×

10<sup>−

3</sup>×

[E] 

 

(1)

wherein

[A] denotes a proportion (mass %) occupied by a soap component derived from a calcium sulfonate in the total amount of soap components derived from a calcium salicylate, a calcium sulfonate, and a calcium phenate;

[B] denotes the content (mass %) of the magnesium-based detergent as converted into a magnesium atom;

[C] denotes the content (mass %) of a boron atom contained in the lubricating oil composition;

[D] denotes the content (mass %) of the ashless friction modifier; and

[E] denotes E calculated according to the following expression;

E=([A]+1)×

([B]+0.001) 

 

(2)

the values of [B] to [D] being a value on the basis of the whole amount of the lubricating oil composition.

2. The lubricating oil composition according to claim 1, wherein a total content of the calcium atom and the magnesium atom in the lubricating oil composition is 0.3 mass % or less on the basis of the whole amount of the lubricating oil composition.

3. The lubricating oil composition according to claim 1, wherein the lubricating base oil has a kinematic viscosity at 100°

C. of 3 to 5 mm²/s and a % Cp by n-d-M ring analysis of 80% or more.

4. The lubricating oil composition according to claim 1, wherein the boron-containing compound is at least one selected from the group consisting of a borated dispersant, an alkali metal boric acid salt, a borated epoxide, a boric acid ester, a borated aliphatic amine, and a borated amide.

5. The lubricating oil composition according to claim 1, further comprising a non-boron-containing succinimide.

6. The lubricating oil composition according to claim 1, wherein the ashless friction modifier is at least one selected from the group consisting of an ester-based ashless friction modifier and an amine-type ashless friction modifier.

7. The lubricating oil composition according to claim 1, further comprising one or more of an additive for lubricating oil selected from the group consisting of a viscosity index improver, a pour-point depressant, an anti-wear agent, an antioxidant, and an antifoaming agent.

8. The lubricating oil composition according to claim 1, which has a kinematic viscosity at 100°

C. of less than 12.5 mm²/s and a high-temperature high-shear viscosity (HTHS viscosity) at 150°

C. of less than 3.5 mPa·

s.

9. The lubricating oil composition according to claim 1, which has a base number of 4 to 10 mgKOH/g.

10. The lubricating oil composition according to claim 1, which is used for an internal combustion engine.

11. A method for producing a lubricating oil composition comprising:

blending a lubricating base oil with at least a metal-based detergent, a molybdenum dialkyldithiocarbamate compound, and a boron-containing compound, to obtain a lubricating oil composition, wherein

the metal-based detergent contains

a calcium salicylate and

at least one selected from the group consisting of a calcium sulfonate and a magnesium-based detergent,

the lubricating base oil is further arbitrarily blended with an ashless friction modifier,

in the lubricating oil composition, the content of a calcium atom is 0.12 to 0.16 mass % on the basis of the whole amount of the lubricating oil composition;

and the content of a molybdenum atom is 0.05 to 0.10 mass % on the basis of the whole amount of the lubricating oil composition, and

X calculated according to the following expression (1) is less than 0.050;

X=3.8×

10<sup>−

2</sup>−

2.7×

10<sup>−

4</sup>×

[A]−

4.2×

10<sup>−

1</sup>×

[B]+5.4×

10<sup>−

1</sup>×

[C]−

5.2×

10<sup>−

3</sup>×

[D]+7.3×

10<sup>−

3</sup>×

[E] 

 

(1)

wherein

[A] denotes a proportion (mass %) occupied by a soap component derived from a calcium sulfonate in the total amount of soap components derived from a calcium salicylate, a calcium sulfonate, and a calcium phenate;

[B] denotes the content (mass %) of the magnesium-based detergent as converted into a magnesium atom;

[C] denotes the content (mass %) of a boron atom contained in the lubricating oil composition;

[D] denotes the content (mass %) of the ashless friction modifier; and

[E] denotes E calculated according to the following expression;

E=([A]+1)×

([B]+0.001) 

 

(2)

the values of [B] to [D] being a value on the basis of the whole amount of the lubricating oil composition.