Lubricating oil compositions containing methylol polyether amino ethanes
AssigneeChevron Research Company
InventorCurtis B. Campbell
Life of this patent
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Abstract
Additives for lubricating oils for internal combustion engines which contribute dispersancy and detergency to the lubricating oils are disclosed. The additives are hydrocarbyl methylol poly(oxyalkylene) amino ethanes comprising a hydrocarbyl-terminated methylol poly(oxyalkylene) chain of 2 to 4 carbon oxyalkylene units bonded to an ethane or substituted ethane chain in turn bonded to a nitrogen atom of an amine or polyamine having from 1 to 12 amine nitrogens and from 2 to 40 carbon atoms.
Claims8
A lubricating oil composition comprising a major portion of oil of lubricating viscosity, and an amount sufficient to provide dispersancy of a hydrocarbyl methylol polyoxyalkylene amino ethane of molecular weight from about 300 to about 2500;
- wherein said hydrocarbyl group contains from 5 to about 30 carbon atoms, said polyoxyalkylene moiety comprises 1 to 30 oxyalkylene units selected from oxyalkylene units having from 2 to 4 carbon atoms, said ethane moiety is a two carbon chain, or a two carbon chain substituted with one or two lower alkyl units of up to 5 carbon atoms each with the proviso that the alkyl units contain a different number of carbon atoms as those extending from the oxyalkylene units of the polyoxyalkylene moiety and said amino moiety is a polyamine which comprises from 2 to about 12 amine nitrogen atoms and from about 2 to 40 carbon atoms.
Dependencies are inferred from the claim text.