Low viscosity, low volatility lubricating oil basestocks

Patent metadata

Field	Value
Publication number	US-10323204-B2
Application number	US-201414496268-A
Country	US
Kind code	B2
Filing date	Sep 25, 2014
Priority date	Oct 25, 2013
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

This disclosure provides low viscosity, low volatility aryl ether compounds represented by formula (1):

and represented by formula (2):

wherein R 1 is the same or different and is a linear or branched alkyl group having from 1 to 20 carbon atoms; R 2 is the same or different and is hydrogen or an alkyl group having from 1 to 4 carbon atoms; and n is the same or different and is a value from 0 to 8. This disclosure also provides processes for producing the aryl ether compounds, lubricating oil basestocks and lubricating oils containing one or more of the aryl ether compounds, and a method for improving one or more of solubility and dispersancy of polar additives and/or sludge in a lubricating oil by using as the lubricating oil a formulated oil containing one or more of the aryl ether compounds.

First claim

What is claimed is:

1. A lubricating oil basestock comprising one or more compounds represented by formula (1):

and/or by formula (2):

wherein R 1 is the same or different and is a linear or branched alkyl group having from 1 to 20 carbon atoms; R 2 is the same or different and is hydrogen or an alkyl group having from 1 to 4 carbon atoms; and n is the same or different and is a value from 0 to 8; and wherein the lubricating oil basestock has a kinematic viscosity at 100° C., measured according to ASTM standard D-445, of from 1.5 to 3.81 cSt and a Noack volatility of no greater than 30 percent, determined by ASTM D-5800.

2. The lubricating oil basestock of claim 1 which comprises a mixture of two or more compounds represented by formula (1); two or more compounds represented by formula (2); or two or more compounds represented by formula (1) and formula (2).

3. The lubricating oil basestock of claim 1 which has a kinematic viscosity (Kv) at a temperature of 40° C. (Kv at 40° C.), measured according to ASTM standard D-445, from 1 to 50 cSt; and a viscosity index (VI), measured according to ASTM standard D-2270, from 20 to 200.

4. A lubricating oil comprising a lubricating oil basestock as a major component, and a lubricating oil cobasestock as a minor component; wherein said lubricating oil cobasestock is represented by formula (1):

or by formula (2):

wherein R 1 is the same or different and is a linear or branched alkyl group having from 1 to 20 carbon atoms; R 2 is the same or different and is hydrogen or an alkyl group having from 1 to 4 carbon atoms; and n is the same or different and is a value from 0 to 8; and wherein said lubricating oil cobasestock has a kinematic viscosity at 100° C., measured according to ASTM standard D-445, of from 1.5 to 3.81 cSt and a Noack volatility of no greater than 30 percent, determined by ASTM D-5800.

5. The lubricating oil of claim 4 wherein the lubricating oil basestock comprises a Group I, II, III, IV or V base oil stock.

6. The lubricating oil of claim 4 wherein the lubricating oil basestock comprises a polyalphaolefin (PAO) or gas-to-liquid (GTL) oil basestock.

7. The lubricating oil of claim 4 wherein the lubricating oil basestock is present in an amount from 1 weight percent to 99 weight percent, and the lubricating oil cobasestock is present in an amount from 1 weight percent to 99 weight percent, based on the total weight of the lubricating oil.

8. The lubricating oil of claim 4 wherein, in the lubricating oil cobasestock, R 1 is a linear or branched alkyl group having from 1 to 10 carbon atoms; R 2 is hydrogen; and n is a value from 0 to 6.

9. The lubricating oil of claim 4 wherein, in the lubricating oil cobasestock, R 1 is a linear or branched alkyl group having from 1 to 8 carbon atoms; R 2 is hydrogen; and n is a value from 0 to 4.

10. The lubricating oil of claim 4 , wherein the lubricating oil cobasestock of formula (1) is represented by the formula selected from the group consisting of:

11. The lubricating oil of claim 4 , wherein the lubricating oil cobasestock of formula (2) is represented by the formula selected from the group consisting of:

12. The lubricating oil of claim 4 , wherein the lubricating oil cobasestock is mixture comprising two or more compounds represented by formula (1); two or more compounds represented by formula (2); or two or more compounds represented by formula (1) and formula (2).

13. The lubricating oil of claim 4 wherein the lubricating oil cobasestock has a kinematic viscosity (Kv) at a temperature of 40° C. (Kv at 40° C.), measured according to ASTM standard D-445, from 1 to 50 cSt; and a viscosity index (VI), measured according to ASTM standard D-2270, from 20 to 200.

14. The lubricating oil of claim 4 further comprising one or more of a viscosity improver, antioxidant, detergent, dispersant, pour point depressant, corrosion inhibitor, metal deactivator, seal compatibility additive, anti-foam agent, inhibitor, and anti-rust additive.

15. A method for improving one or more of solubility and dispersancy of polar additives or sludge in a lubricating oil by using as the lubricating oil a formulated oil comprising a lubricating oil basestock as a major component, and a lubricating oil cobasestock as a minor component; wherein said lubricating oil cobasestock comprises one or more compounds represented by formula (1):

or one or more compounds represented by formula (2):

wherein R 1 is the same or different and is a linear or branched alkyl group having from 1 to 20 carbon atoms; R 2 is the same or different and is hydrogen or an alkyl group having from 1 to 4 carbon atoms; and n is the same or different and is a value from 0 to 8; and wherein said lubricating oil cobasestock has a kinematic viscosity at 100° C., measured according to ASTM standard D-445, of from 1.5 to 3.81 cSt and a Noack volatility of no greater than 30 percent, determined by ASTM D-5800.

16. The method of claim 15 , wherein the lubricating oil cobasestock is mixture comprising two or more compounds represented by formula (1); two or more compounds represented by formula (2); or two or more compounds represented by formula (1) and formula (2).

17. The method of claim 15 wherein the lubricating oil cobasestock has a kinematic viscosity (Kv) at a temperature of 100° C. (Kv at 100° C.), measured according to ASTM standard D-445, from 1.5 to 5 cSt; a kinematic viscosity (Kv) at a temperature of 40° C. (Kv at 40° C.), measured according to ASTM standard D-445, from 1 to 50 cSt; and a viscosity index (VI), measured according to ASTM standard D-2270, from 20 to 200.

Assignees

• Exxonmobil Res & Eng Co

Inventors

• Patil Abhimanyu O
• Bodige Satish

Classifications

• C10M2203/1025

  used as base material · CPC title

• C10M2203/1006

  used as base material · CPC title

• C07C43/2055

  containing more than one ether bond · CPC title

• C07C41/16

  by reaction of esters of mineral or organic acids with hydroxy or O-metal groups · CPC title

• C10M2207/0406

  used as base material · CPC title