Succinate derivatives of 2,5-dimercapto-1,3,4-thiadiazoles
AssigneeR. T. Vanderbilt Company, Inc.
InventorThomas J. Karol
Life of this patent
Estimating the term…
Abstract
Disclosed are novel succinic acid derivatives of 2(and 5)-2-hydroxyethylthio)-1,3,4-thiadiazole. These compounds are shown to be effective multifunctional additives for improving the anticorrosion and performance characteristics of lubricants and alcohol-based fuels.
Claims5
A compound having the structural formula ##STR4## wherein R represents hydrogen, C.sub.1-100 -alkyl, alkenyl, cycloalkyl, alkylcycloalkyl, 2-hydroxyalkyl and a group of the structural formula ##STR5## and wherein R.sup.1 and R.sup.2 are selected independently from the group consisting of C.sub.1-50 -alkyl, alkoxyalkyl, phenoxyalkyl, aralkyl, cycloalkyl, aryl, alkaryl, alkenyl and alkynyl groups, R.sup.3 and R.sup.4 are selected independently from the group consisting of C.sub.1-50 -alkyl, aralkyl, cycloalkyl, aryl, alkaryl, alkenyl and alkynyl groups, R.sup.5 is calcium ion and R.sup.6 is calcium ion or hydrogen.
A composition comprising a major amount of oil of lubricating viscosity wherein said oil is a petroleum hydrocarbon oil or a synthetic oil and from about 0.1 to 12 percent by weight of a compound having the structural formula ##STR6## wherein R represents hydrogen, C.sub.1-100 -alkyl, alkenyl, cycloalkyl, alkylcycloalkyl, 2-hydroxyalkyl and a group of the structural formula ##STR7## and wherein R.sup.1 and R.sup.2 are selected independently from the group consisting of C.sub.1-50 -alkyl, alkoxyalkyl, phenoxyalkyl, aralkyl, cycloalkyl, aryl, alkaryl, alkenyl and alkynyl groups, R.sup.3 and R.sup.4 are selected independently from the group consisting of C.sub.1-50 -alkyl, aralkyl, cycloalkyl, aryl, alkaryl, alkenyl and alkynyl groups, R.sup.5 is calcium ion and R.sup.6 is calcium ion or hydrogen.
A composition comprising at least 40 percent by weight of water, from 0 to 15 percent by weight of petroleum hydrocarbon oil or synthetic oil and about 0.1 to 10 percent by weight of a compound having the structural formula ##STR8## wherein R represents hydrogen, C.sub.1-100 -alkyl, alkenyl, cycloalkyl, alkylcycloalkyl, 2-hydroxyalkyl and a group of the structural formula ##STR9## and wherein R.sup.1 and R.sup.2 are selected independently from the group consisting of C.sub.1-50 -alkyl, alkoxyalkyl, phenoxyalkyl, aralkyl, cycloalkyl, aryl, alkaryl, alkenyl and alkynyl groups, R.sup.3 and R.sup.4 are selected independently from the group consisting of C.sub.1-50 -alkyl, aralkyl, cycloalkyl, aryl, alkaryl, alkenyl and alkynyl groups, R.sup.5 and R.sup.6 are selected independently from the group consisting of hydrogen, metal cation and trialkylammonium.
A composition comprising a major amount of alcohol fuel and from about 0.01 to 2 percent by weight of a compound having the structural formula ##STR10## wherein R represents hydrogen, C.sub.1-100 -alkyl, alkenyl, cycloalkyl, alkylcycloalkyl, 2-hydroxyalkyl and a group of the structural formula ##STR11## and wherein R.sup.1 and R.sup.2 are selected independently from the group consisting of C.sub.1-50 -alkyl, alkoxyalkyl, phenoxyalkyl, aralkyl, cycloalkyl, aryl, alkaryl, alkenyl and alkynyl groups, R.sup.3 and R.sup.4 are selected independently from the group consisting of C.sub.1-50 -alkyl, aralkyl, cycloalkyl, aryl, alkaryl, alkenyl and alkynyl groups, R.sup.5 and R.sup.6 are selected independently from the group consisting of hydrogen, metal cation and trialkylammonium.
Dependencies are inferred from the claim text.