POLYAKYLENE GLYCOLS USEFUL AS LUBRICANT ADDITIVES FOR GROUPS I-IV HYDROCARBON OILS

• US 20120108482A1
• Filed: 07/23/2010
• Published: 05/03/2012
• Est. Priority Date: 07/23/2009
• Status: Active Grant

• Current Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Original Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Inventors: Greaves, Martin R., Vanvoorst, Ronald, Meertens, Marinus, Khelidj, Nadjet, Zaugg-Hoozemans, Evelyn
• Granted Patent: US 8,969,271 B2
• Time in Patent Office: Days
• US Class Current: 508/579
• CPC Class Codes: C10M 107/34 Polyoxyalkylenes
• CPC Class Codes: C10M 111/04 at least one of them being a macromolecular organic compound
• CPC Class Codes: C10M 2203/1006 used as base material
• CPC Class Codes: C10M 2203/1025 used as base material
• CPC Class Codes: C10M 2205/0285 used as base material
• CPC Class Codes: C10M 2209/1055 used as base material
• CPC Class Codes: C10M 2209/1065 used as base material
• CPC Class Codes: C10M 2209/107 of two or more specified different alkylene oxides covered by groups C10M2209/104 - C10M2209/106
• CPC Class Codes: C10M 2209/1075 used as base material
• CPC Class Codes: C10M 2209/1085 used as base material
• CPC Class Codes: C10N 2020/02 Viscosity; Viscosity index
• CPC Class Codes: C10N 2030/64 Environmental friendly compositions
• CPC Class Codes: C10N 2030/70 Soluble oils
• CPC Class Codes: C10N 2060/02 Reduction, e.g. hydrogenation

Abstract

Certain polyalkylene glycols, useful as lubricant additives, are soluble with all four types of hydrocarbon base oils (Groups I-IV) at a wide variety of ratios of oil to polyalkylene glycol and under a variety of conditions. These polyalkylene glycols are prepared by reacting a C8-C20 alcohol and a mixed butylene oxide/propylene oxide feed, wherein the ratio of butylene oxide to propylene oxide ranges from 3:1 to 1:1. The invention provides a means of providing desirable lubricant compositions which may pose fewer environmental problems.

Claims

1. A lubricant composition comprising a Group I, II, III or IV hydrocarbon oil and a polyalkylene glycol, the polyalkylene glycol having been prepared by reacting a C8-C20 alcohol and a mixed butylene oxide/propylene oxide feed, wherein the ratio of butylene oxide to propylene oxide ranges from 3:

1 to 1;

3, the hydrocarbon oil and the polyalkylene glycol being soluble with one another.

2. The lubricant composition of claim 1 wherein the alcohol is a C8-C12 alcohol.

3. The lubricant composition of claim 2 wherein the alcohol is 2-ethylhexanol, dodecanol, or a mixture thereof.

4. The lubricant composition of claim 1 wherein the polyalkylene glycol and the hydrocarbon oil are soluble with one another at a hydrocarbon oil to polyalkylene glycol ratio ranging from 90/10 to 10/90.

5. The lubricant composition of claim 4 wherein the hydrocarbon oil is a Group IV hydrocarbon oil and the polyalkylene glycol and the hydrocarbon oil are soluble with one another at a hydrocarbon oil to polyalkylene glycol ratio ranging from 90/10 to greater than 50/50.

6. The lubricant composition of claim 1 wherein the hydrocarbon oil and the polyalkylene glycol are soluble with one another for at least one week under at least one temperature selected from 25°

C., 80°

C., or −

10°

C.

7. The lubricant composition of claim 6 wherein the hydrocarbon oil and the polyalkylene glycol are soluble with one another for at least one week under temperatures ranging from −

10°

C. to 80°

C.

8. The lubricant composition of claim 1 wherein the alcohol is dodecanol and the ratio of butylene oxide to propylene oxide is from 3:

1 to 1;

1.

9. The lubricant composition of claim 8 wherein the polyalkylene glycol and the hydrocarbon oil are soluble with one another at temperatures from −

10°

C. to 80°

C. over at least one week.

10. The lubricant composition of claim 1 wherein the polyalkylene glycol has a carbon to oxygen ratio that is at least 3:

1.

11. The lubricant composition of claim 10 wherein the polyalkylene glycol has a carbon to oxygen ratio that is from 3:

1 to 6;

1.

12. A method of preparing a lubricant composition comprising blending at least (a) a Group I, II, III or IV hydrocarbon oil, and (b) a polyalkylene glycol prepared by reacting a C8-C20 alcohol and a mixed butylene oxide/propylene oxide feed, wherein the ratio of butylene oxide to propylene oxide ranges from 3:

1 to 1;

3;

under conditions such that the hydrocarbon oil and the polyalkylene glycol are soluble with one another.