Lubricating oil composition providing anti-wear protection
AssigneeTexaco Inc.
InventorsGregory P. Anderson, Julian H. Dancy, Doris Love, Jayne M. Lucas
Life of this patent
Estimating the term…
Abstract
The present invention provides a lubricating oil additive which provides anti-wear properties to a lubricating oil. The additive is the reaction product of 2,5-dimercapto-1,3,4-thiadiazole and a mixture of unsaturated mono-, di-, and tri-glycerides. The present invention also provides a lubricating oil additive with anti-wear properties produced by reacting a mixture of unsaturated mono-, di-, and tri-glycerides with diethanolamine to provide an intermediate reaction product and reacting the intermediate reaction product with 2,5-dimercapto-1,3,4-thiadiazole.
Claims24
An anti-wear additive comprising the reaction product of 2,5-dimercapto-1,3,4-thiadiazole and a mixture of unsaturated mono-, di-, and tri-glycerides of formula:
- ##STR12## where R.sub.1, R.sub.2 and R.sub.3 comprise hydrogen or radicals having the formula:
- ##STR13## where R.sub.4 is a C.sub.6 to C.sub.24 unsaturated hydrocarbon.
A lubricating composition comprising a major portion of a lubricating oil and a minor portion, effective to impart anti-wear properties to the lubricating composition of an additive comprising the reaction product of 2,5-dimercapto-1,3,4-thiadiazole and a mixture of unsaturated mono-, di-, and tri-glycerides of formula:
- ##STR14## where R.sub.1, R.sub.2 and R.sub.3 comprise hydrogen or hydrocarbyl radicals having the formula:
- ##STR15## where R.sub.4 is a C.sub.6 to C.sub.24 unsaturated hydrocarbon.
A lubricating composition comprising a major portion of a lubricating oil and a minor portion, effective to impart anti-wear properties to the lubricating composition of an additive produced by the steps comprising:
- reacting a mixture of unsaturated mono-, di-, and tri-glycerides of formula:
- ##STR16## where R.sub.1, R.sub.2 and R.sub.3 comprises hydrogen or a radical having the formula:
- ##STR17## where R.sub.4 is a C.sub.6 to C.sub.24 unsaturated hydrocarbon, with diethanolamine to provide an intermediate reaction product;
- and
- reacting the intermediate reaction product with 2,5-dimercapto-1,3,4-thiadiazole.
Dependencies are inferred from the claim text.