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US 6,018,063 AGranted
Biodegradable oleic estolide ester base stocks and lubricants
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorsTerry A. Isbell, Thomas P. Abbott, Svajus Asadauskas, Joseph E. Lohr, Jr.
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Abstract
Esters of estolides derived from oleic acids are characterized by superior properties for use as lubricant base stocks. These estolides may also be used as lubricants without the need for fortifying additives normally required to improve the lubricating properties of base stocks.
Claims12
An estolide compound of the Formula:
- ##STR2## wherein x and y are each equal to 1 or greater than 1;
- wherein x+y=10;
- wherein n is 0, 1, or greater than 1;
- wherein R is CHR.sub.1 R.sub.2 ;
- wherein R.sub.1 and R.sub.2 are independently selected from hydrogen and C1 to C36 hydrocarbon which may be saturated or unsaturated, branched or straight chain, and substituted or unsubstituted;
- wherein R.sub.3 is a residual fragment of oleic, stearic or other fatty acid chain;
- and
- wherein the predominant species of secondary ester linkage is at the 9 or 10 position;
- that is, wherein x=5 or 6 and y=5 or 4, respectively with the proviso that, when n is 0, R.sub.1 & R.sub.2 are not both hydrogen.
6 more elements
A lubricant composition comprising (1):
- an estolide compound of the Formula:
- ##STR3## wherein x and y are each equal to 1 or greater than 1;
- wherein x+y=10;
- wherein n is 0, 1, or greater than 1;
- wherein R is CHR.sub.1 R.sub.2 ;
- wherein R.sub.1 and R.sub.2 are independently selected from hydrogen and C1 to C36 hydrocarbon which may be saturated or unsaturated, branched or straight chain, and substituted or unsubstituted;
- wherein R.sub.3 is a residual fragment of oleic, stearic or other fatty acid chain;
- and
- wherein the predominant species of secondary ester linkage is at the 9 or 10 position;
- that is, wherein x=5 or 6 and y=5 or 4, respectively;
- and (2), an effective amount of lubricating agent.
8 more elements
Dependencies are inferred from the claim text.