Lubricating and petroleum fuel oil compositions containing azole polysulfide wear inhibitors
AssigneeExxon Research & Engineering Co.
InventorTerence Colclough
Life of this patent
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Abstract
Azole aminopolysulfides and azine aminopolysulfides are effective as ashless antiwear agents for lubricating oils, particularly when used in combination with an ashless dispersant.
Claims8
An oil composition comprising a major amount of lubricating oil, a minor but at least a metal wear inhibiting amount of an azoleamino polysulfide or an azine aminopolysulfide of the structure:
- ##STR16## where the group ##STR17## forms part of a 5-membered azole heterocyclic ring or a 6-membered azine heterocyclic ring, n is at least 2, X is 0, S, or NR.sup.3 where R.sup.3 is H or a lower alkyl group and R.sup.1 and R.sup.2 which are the same or different are hydrogen, a hydrocarbyl group containing from 1 to 25 carbons or one part of a ring of the class consisting of morpholino, piperidino and piperazino and a minor but at least dispersing amount of a lubricating oil ashless dispersant.
An oil composition comprising a major amount of a lubricating oil and a minor but at least metal wear inhibiting amount of an azole polysulfide of the general formula:
- ##STR18## wherein at least one of X and Y is at least 2, and R.sup.1 and R.sup.2 which are the same or different are hydrogen, a hydrocarbyl group containing from 1 to 25 carbons or one part of a ring of the class consisting of morpholino, piperidino and piperazino.
An oil composition comprising a major amount of a lubricating oil and a minor but at least metal wear inhibiting amount of an azole polysulfide of the general formula:
- ##STR19## where at least one of x and y is at least 2 and R.sup.1 and R.sup.2 which are the same or different are hydrogen, a hydrocarbyl group containing from 1 to 25 carbons or one part of a ring of the class consisting of morpholino, piperidino and piperazino.
Dependencies are inferred from the claim text.