Multifunctional additives
AssigneeMobil Oil Corporation
InventorsAngeline B. Cardis, Arjun K. Goyal, Virginia C. Wiszniewski
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Abstract
A multifunctional antioxidant, antiwear and dispersancy additive for fuels and lubricants is a reaction product of a thiol-substituted diazole, such as aminomercaptothiadiazole (AMTD) or dimercaptothiadiazole (DMTD), an aldehyde and a hydrocarbon-substituted succinimide dimer. The succinimide dimer is derived from polyisobutenyl succinimide and tetraethylenepentamine which are reacted in a mole ratio of 2:1.
Claims19
A multifunctional additive for lubricants comprising a reaction product of a hydrocarbon-substituted succinimide dimer, an aldehyde and a thiol-substituted diazole, the thiol-substituted diazole having the structural formula:
- ##STR7## where X is a sulfur atom or oxygen atom and Y is a thiol group or nitrogenous group when Y is a nitrogenous group it is a primary amine characterized by the formula NH.sub.2 or a secondary amine characterized by the formula NHR.sub.1, wherein R1 is a hydrocarbon group containing 1 to 60 carbon atoms.
A lubricant composition comprising a major amount of a lubricant and a minor additive amount of a reaction product of a hydrocarbon-substituted succinimide dimer, an aldehyde and a thiol-substituted diazole, the thiol-substituted diazole having the structural formula:
- ##STR9## where X is a sulfur atom or oxygen atom and Y is a thiol group or nitrogenous group where Y is a nitrogenous group it is a primary amine characterized by the formula NH.sub.2 or a secondary amine characterized by the formula NHR.sub.1, wherein R1 is a hydrocarbon group containing 1 to 60 carbon atoms.
A method of making a lubricant composition comprising blending a major proportion of a lubricant and a minor amount of a reaction product of a hydrocarbon-substituted succinimide dimer, an aldehyde and an thiol-substituted diazole, the thiol-substituted diazole having the structural formula:
- ##STR11## where X is a sulfur atom or oxygen atom and Y is a thiol group or nitrogenous group where Y is a nitrogenous group it is a primary amine characterized by the formula NH.sub.2 or a secondary amine characterized by the formula NHR.sub.1, wherein R1 is a hydrocarbon group containing 1 to 60 carbon atoms.
Dependencies are inferred from the claim text.