Lacquer reducing lubricating oil composition and method of use of same

• US 20060084582A1
• Filed: 12/08/2005
• Published: 04/20/2006
• Est. Priority Date: 04/18/2003
• Status: Abandoned Application

• Current Assignee: Kevin John Kelly, Paul P. Wells, Vincent Mark Carey
• Original Assignee: Kevin John Kelly, Paul P. Wells, Vincent Mark Carey
• Inventors: Wells, Paul P., Carey, Vincent Mark, Kelly, Kevin John
• Application Number:
  US11/296,998
• Publication Number:
  US 20060084582A1
• Time in Patent Office: Days
• US Class Current: 508/192
• CPC Class Codes: C10M 169/045 the additives being a mixture of compounds of unknown or incompletely defined constitution and non-macromolecular compounds
• CPC Class Codes: C10M 2203/1006 used as base material
• CPC Class Codes: C10M 2205/0285 used as base material
• CPC Class Codes: C10M 2207/028 Overbased salts thereof
• CPC Class Codes: C10M 2215/064 Di- and triaryl 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: C10N 2010/04 Groups 2 or 12
• CPC Class Codes: C10N 2030/04 Detergent property or dispersant property
• CPC Class Codes: C10N 2040/12 Gas-turbines
• CPC Class Codes: C10N 2040/25 Internal-combustion engines
• CPC Class Codes: C10N 2060/14 by boron or a compound containing boron

Abstract

This invention relates to lubricating oil compositions that have surprisingly been shown to reduce the formation of lacquer deposits in engines. More specifically, this invention relates to a lubricating oil for natural gas engines that reduces siloxane-related cylinder liner lacquer deposits.

Claims

1. A lubricating oil composition comprising:

(a) at least about 20 wt % of at least one base oil of lubricating viscosity selected from the group consisting of Group II, Group III and Group IV base stocks;

(b) a diarylamine;

(c) an alkaline earth metal phenate;

(d) an alkali earth metal sulfonate;

(e) a borated aminated hydrocarbyl succinic derivative.

2. The lubricant oil of claim 1 wherein the diarylamine is an alkylated diphenyl amine provided to said composition in a concentration of about 0.05 to 2.0 wt %.

3. The lubricant oil of claim 1 wherein the diarylamine is an alkylated diphenyl amine provided to said composition in a concentration of about 0.2 to 0.75 wt %.

4. The lubricant oil of claim 1 wherein the alkaline earth metal phenate is a calcium based phenate provided to said composition in a concentration of about 0.05 to 5.0 wt %.

5. The lubricant oil of claim 1 wherein the alkaline earth metal phenate is a calcium based phenate provided to said composition in a concentration of about 0.9 to 2.7 wt %.

6. The lubricant oil of claim 1 wherein the alkali earth metal sulfonate is a calcium sulfonate provided to said composition in a concentration of about 0.5 to 5.0 wt %.

7. The lubricant oil of claim 6 wherein the calcium sulfonate is a neutral calcium sulfonate provided to said composition in a concentration of about 0.5 to 1.0 wt %.

8. The lubricant oil of claim 1 wherein said borated aminated hydrocarbyl succinic derivative is derived from succinic anhydride and provided to said composition in a concentration of about 1.0 to 10.0 wt %.

9. The lubricant oil of claim 8 wherein the borated aminated polybutenyl succinic anhydride is provided to said composition in a concentration of about 1.75 to 3.0 wt %.

10. The lubricant oil of claim 1 wherein

said diarylamine is an alkylated diphenyl amine provided to said composition in a concentration of about 0.05 to 2.0 wt %,

said alkaline earth metal phenate is a calcium based phenate provided to said composition in a concentration of about 0.05 to 5.0 wt %,

said alkaline earth metal sulfonate is a calcium sulfonate provided to said composition in a concentration of about 0.5 to 5.0 wt %,

said borated aminated hydrocarbyl succinic derivative is derived from succinic anhydride and provided to said composition in a concentration of about 1.0 to 10.0 wt %.

11. The lubricant oil of claim 1 wherein

said diarylamine is an alkylated diphenyl amine provided to said composition in a concentration of about 0.2 to 0.75 wt %,

said alkaline earth metal phenate is a calcium based phenate provided to said composition in a concentration of about 0.9 to 2.7 wt %,

said alkaline earth metal sulfonate is a calcium sulfonate provided to said composition in a concentration of about 0.5 to 1.0 wt %,

said borated aminated hydrocarbyl succinic derivative is derived from succinic anhydride and provided to said composition in a concentration of about 1.75 to 3.0 wt %.

12. A method of reducing lacquer in natural gas engines comprising employing the lubricant of claim 1.

13. A method of reducing lacquer in natural gas engines comprising employing the lubricant of claim 10.

14. A method of reducing lacquer in natural gas engines comprising employing the lubricant of claim 11.

15. A lubricant oil composition comprising:

(a) at least about 20 wt % of at least one base oil of lubricating viscosity selected from the group consisting of Group II, Group III and Group IV base stocks;

(b) about 0.20 to about 0.75 wt % of an alkylated diphenyl amines;

(c) about 0.9 to about 2.7 wt % of at least one overbased alkali-metal phenate sulfide;

(d) about 0.50 to about 1.0 wt % of neutral alkali-metal sulfonate; and

(e) about 1.75 to about 3.0 wt % of a borated aminated hydrocarbyl succinic derivative which is derived from a succinic anhydride

16. A method of reducing lacquer in natural gas engines comprising employing a lubricant oil composition comprising:

(a) at least about 20 wt % of at least one base oil of lubricating viscosity selected from the group consisting of Group II, Group III and Group IV base stocks;

(b) about 0.20 to about 0.75 wt % of an alkylated diphenyl amines;

(c) about 0.9 to about 2.7 wt % of at least one overbased alkali-metal phenate sulfide;

(d) about 0.5 to about 1.0 wt % of neutral alkali-metal sulfonate; and

(e) about 1.75 to about 3.0 wt % of a borated aminated hydrocarbyl succinic derivative which is derived from a succinic anhydride

17. An additive for use in a lubricating oil composition which contains at least about 20 wt % of a non Group I base oil, said additive comprising:

(a) a diarylamine;

(b) an alkaline earth metal phenate;

(c) an alkaline earth metal sulfonate; and

(d) a borated aminated hydrocarbyl succinic derivative