Claims
- 1. A lubricant having a major amount of lubricating oil and a minor amount of an antioxidant comprising the reaction product of tris (hydroxymethyl) aminomethane and a linear or branched carboxylic acid, thereby producing substituted oxazolines having the general formula: wherein R is a linear or branched alkyl chain derived from said linear or branched carboxylic acid.
- 2. The lubricant of claim 1 wherein said antioxidant has a hydroxyl number of greater than about 30 and less than about 180.
- 3. The lubricant of claim 1 wherein said antioxidant has a hydroxyl number of greater than about 50 and less than about 120.
- 4. The lubricant of claim 1 wherein said antioxidant has a hydroxyl number of greater than about 70 and less than about 100.
- 5. The lubricant of claim 1 wherein said carboxylic acid comprises about 50% or more of a branched carboxylic acid.
- 6. The lubricant of claim 5 wherein said branched carboxylic acid is 2-methyl-propanoic acid.
- 7. The lubricant of claim 5 wherein said branched carboxylic acid is further characterized as having a carbon number from about 5 to about 20, wherein said carboxylic acid has at least one methyl group located at the penultimate carbon position Cm-1.
- 8. The lubricant of claim 7 wherein branches of the branched carboxylic acid are characterized as dimethyl branches, said dimethyl branches being located at any position between, and including, C2 and Cm-1.
- 9. The lubricant of claim 7 wherein the branched carboxylic acid has a methylene moiety at the penultimate carbon position.
- 10. The lubricant of claim 7 wherein when the penultimate carbon position has one methyl group, another methyl group can be located on the contiguous chain such that there is one of a gem dimethyl group or carbonyl group located two carbon positions from the another methyl group.
- 11. The lubricant of claim 1 further comprising a monoethyl branch located at position 2 of the contiguous carbon chain.
Parent Case Info
This application is a continuation-in-part of U.S. Ser. No. 08/713,420, filed Sep. 13, 1996, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4849123 |
Tipton et al. |
Jul 1989 |
A |
Foreign Referenced Citations (3)
Number |
Date |
Country |
WO 9628525 |
Sep 1996 |
WO |
WO 9811179 |
Mar 1998 |
WO |
WO 9811181 |
Mar 1998 |
WO |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
08/713420 |
Sep 1996 |
US |
Child |
09/855125 |
|
US |