Polyalkylated 1,3,4-thiadiazoles and lubricating compositions containing same
AssigneeR. T. Vanderbilt Company, Inc.
InventorThomas J. Karol
Life of this patent
Estimating the term…
Abstract
Disclosed are novel compounds derived from 2,5-dimercapto-1,3,4-thiadiazole and one or two moles of polyolefin having 5 to 400 carbon atoms. Furthermore, the 5-position of the 2-mercapto-1,3,4-thiadiazole may be substituted by alkylthio, 2-hydroxyalkylthio, amino or hydroxy group. The compounds are effective dispersants, antiwear agents and antioxidants when incorporated into lubricating compositions.
Claims4
A compound having the structural formula ##STR5## wherein R.sup.1 represents hydroxy, amino, mercapto, alkylthio, 2-hydroxyalkylthio or R.sup.2 S-group and R.sup.2 represents a polyolefin residue and is characterised by the formulae ##STR6## wherein R.sup.3 is an alkyl group having 50 to 400 carbon atoms and R.sup.4 is hydrogen or methyl group.
A composition comprising a major amount of oil of lubricating viscosity selected from the group consisting of petroleum hydrocarbon oil and synthetic oil and from about 0.1 to 10 percent by weight of a compound having the structural formula ##STR7## wherein R.sup.1 represents hydroxy, amino, mercapto, alkylthio, 2-hydroxyalkylthio or R.sup.2 S-group and R.sup.2 represents a polyolefin residue and is characterized by the formulae ##STR8## wherein R.sup.3 is an alkyl group having 50 to 400 carbon atoms and R.sup.4 is hydrogen or methyl group.
Dependencies are inferred from the claim text.