Engine oil additive, engine oil and method of addition thereof

• US 8,999,902 B2
• Filed: 08/24/2010
• Issued: 04/07/2015
• Est. Priority Date: 11/20/2009
• Status: Active Grant

• Current Assignee: TMC Co., Ltd. (KPF Co., Ltd.)
• Original Assignee: TMC Co., Ltd. (KPF Co., Ltd.)
• Inventors: Abe, Toshinori
• Primary Examiner(s): GOLOBOY, JAMES C
• Application Number:
  US13/510,112
• Publication Number:
  US 20120231983A1
• Time in Patent Office: 1,687 Days
• Field of Search: 508/150, 977/810
• US Class Current: 508/150
• CPC Class Codes: C10M 125/00 Lubricating compositions characterised by the additive being an inorganic material
• CPC Class Codes: C10M 125/04 Metals; Alloys
• CPC Class Codes: C10M 2201/04 Elements
• CPC Class Codes: C10M 2201/05 Metals; Alloys
• CPC Class Codes: C10M 2203/1006 used as base material
• CPC Class Codes: C10M 2205/173 used as base material
• CPC Class Codes: C10N 2010/02 Groups 1 or 11
• CPC Class Codes: C10N 2020/06 Particles of special shape or size
• 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 2050/015 Dispersions of solid lubricants
• CPC Class Codes: Y10S 977/81 Of specified metal or metal alloy composition
• CPC Class Codes: Y10T 428/2982 Particulate matter [e.g., sphere, flake, etc.]

Abstract

The engine oil additive contains multiple 300 to 500 nm-long polygonal plate-shaped silver crystal particles. The engine oil contains a base oil and the engine oil additive. The method of adding the additive to an engine oil includes adding multiple 300 to 500-nm-long polygonal plate-shaped silver crystal particles as an additive to the engine oil.

Claims

1. A liquid engine oil additive comprising multiple polygonal plate-shaped silver crystal particles, wherein all of the silver crystal particles contained in the engine oil additive have a length of 300 to 500 nm, and wherein the silver crystal particles are dispersed in mineral oil, chemically synthesized oil or mixed oil comprising the mineral oil and the chemically synthesized oil.

2. An engine oil comprising a base oil and the engine oil additive according to claim 1.

3. The engine oil according to claim 2, wherein the content of the silver crystal particles is in the range from 0.25 to 5 g per 4 L of the engine oil.

5. The engine oil additive according to claim 1, wherein the silver crystal particles are uniformly dispersed within the mineral oil, chemically synthesized oil or mixed oil comprising the mineral oil and the chemically synthesized oil.

6. The engine oil additive according to claim 1, wherein the content of the silver crystal particles is in the range from 0.25 to 5 g per 100 mL of the mineral oil, chemically synthesized oil or mixed oil comprising the mineral oil and the chemically synthesized oil.

7. The engine oil additive according to claim 6, wherein the content of the silver crystal particles is in the range from 0.25 to 1 g per 100 mL of the mineral oil, chemically synthesized oil or mixed oil comprising the mineral oil and the chemically synthesized oil.

8. The engine oil according to claim 2, wherein the silver crystal particles are uniformly dispersed within the engine oil.

9. The engine oil according to claim 2, wherein the content of the silver crystal particles is in the range from 0.25 to 1 g per 4 L of the engine oil.

10. The engine oil according to claim 2, wherein the viscosity of the engine oil is 0W-50.

11. The engine oil according to claim 2, wherein the viscosity of the engine oil is 0W-40.

12. The engine oil according to claim 2, wherein the viscosity of the engine oil is 0W-30.

13. The engine oil according to claim 2, wherein the viscosity of the engine oil is 0W-20.

4. A method of adding multiple silver crystal particles as an additive to an engine oil, comprising adding only 300 to 500-nm-long polygonal plate-shaped silver crystal particles as the silver crystal particles to the engine oil.