Triglyceride based lubricant

• US 20060035794A1
• Filed: 08/11/2004
• Published: 02/16/2006
• Est. Priority Date: 08/11/2004
• Status: Active Grant

• Current Assignee: Daniel Graiver, Farminer Kenneth W, Phuong Tran, Ramani Narayan
• Original Assignee: Daniel Graiver, Farminer Kenneth W, Phuong Tran, Ramani Narayan
• Inventors: Narayan, Ramani, Graiver, Daniel, Tran, Phuong, Farminer, Kenneth
• Granted Patent: US 7,601,677 B2
• Time in Patent Office: Days
• US Class Current: 508/491
• CPC Class Codes: C10M 105/38 of polyhydroxy compounds
• CPC Class Codes: C10M 111/02 at least one of them being a non-macromolecular organic compound
• CPC Class Codes: C10M 2201/02 Water
• CPC Class Codes: C10M 2203/10 Petroleum or coal fractions, e.g. tars, solvents, bitumen
• CPC Class Codes: C10M 2207/28 Esters epoxidised esters C10M2207/24
• CPC Class Codes: C10M 2207/401 used as base material
• CPC Class Codes: C10N 2020/011 Cloud point
• CPC Class Codes: C10N 2020/065 Saturated Compounds
• CPC Class Codes: C10N 2020/067 Unsaturated Compounds
• 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 2040/252 Diesel engines
• CPC Class Codes: C10N 2040/255 Gasoline engines
• CPC Class Codes: C10N 2040/26 Two-strokes or two-cycle engines

Abstract

A method for lubrication by supplying a liquid lubricant to moving metal parts, more than fifty percent by weight of the liquid lubricant being a triglyceride vegetable oil having a saturated fatty acid content of less than nine percent by weight of the triglyceride vegetable oil and a polyunsaturated fatty acid content of more than seventy percent by weight of the triglyceride vegetable oil, the triglyceride vegetable oil having an American Petroleum Institute Thermo-Oxidation Engine Oil Simulation Test rod residue weight of less than thirty five milligrams and a pour point of less than minus twenty degrees Celsius.

Claims

1. A method for lubrication, comprising the step of supplying a liquid lubricant into contact with moving metal parts, more than fifty percent by weight of the liquid lubricant being a triglyceride vegetable oil having a saturated fatty acid content of less than nine percent by weight of the triglyceride vegetable oil and a polyunsaturated fatty acid content of more than sixty five percent by weight of the triglyceride vegetable oil, the triglyceride vegetable oil having an American Petroleum Institute Thermo-Oxidation Engine Oil Simulation Test rod residue weight of less than thirty five milligrams and a pour point of less than minus twenty degrees Celsius.

2. The method of claim 1, wherein more than fifty percent by weight of the saturated fatty acid content of the triglyceride vegetable oil consists of palmitic and stearic acids, wherein more than fifty percent by weight of the polyunsaturated fatty acid content of the triglyceride vegetable oil consists of linoleic and linolenic acids, and wherein the triglyceride vegetable oil has a monounsaturated fatty acid content consisting of more than fifty percent oleic acid by weight of the monounsaturated fatty acid content of the triglyceride vegetable oil.

3. The method of claim 1, wherein at least ninety percent by weight of the fatty acids of the triglyceride vegetable oil contain from 16 to 26 carbon atoms.

4. The method of claim 1, wherein the free fatty acid content of the liquid lubricant is less than one hundredth percent by weight of the liquid lubricant.

5. The method of claim 1, wherein the triglyceride vegetable oil of the liquid lubricant has an iodine value of from 140 to 160.

6. The method of claim 1, wherein the liquid lubricant has pour point less than minus thirty degrees Celsius.

7. The method of claim 1, wherein the liquid lubricant contains an additive selected from the group consisting of:

(a) water and from 0.1% to 15% anionic, cationic, nonionic or amphoteric emulsifier;

(b) an oxidation inhibitor, an antiwear agent, an antifoam agent, a corrosion inhibitor, a dispersant, a viscosity index improver, a pour point depressant, a seal conditioner, a metal deactivator, a friction modifier, a detergent and mixtures thereof; and

(c) a mineral oil, a synthetic ester oil, a polyalkyleneglycol adduct oil or other synthetic oil.

8. The method of claim 1, wherein the moving metal parts are contained in a two cycle Otto engine.

9. The method of claim 1, wherein the moving metal parts are contained in a two cycle diesel engine.

10. The method of claim 1, wherein the moving metal parts are contained in a four cycle Otto engine.

11. The method of claim 1, wherein the moving metal parts are contained in a four cycle diesel engine.

12. The method of claim 1, wherein the moving metal parts are contained in a turbine engine.

13. The method of any of claims 1-12, wherein the triglyceride vegetable oil is soybean oil produced from a soybean selected from the group consisting of the soybean of U.S. Pat. No. 5,585,535, U.S. Pat. No. 5,750,844 or U.S. Pat. No. 5,750,845.

14. The method of any of claims 1-12, wherein the triglyceride vegetable oil is soybean oil produced from LoSatSoy soybeans trade marked by Iowa State University Research Foundation.

15. The method of any of claims 1-12, wherein the triglyceride vegetable oil is LoSatOil brand soybean oil from Zeeland Farm Services.