Polymeric dispersants having polyalkylene and succinic groups
AssigneeChevron Chemical Company
InventorsJames J. Harrison, William R. Ruhe, Jr.
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Abstract
Novel copolymers of unsaturated acidic reactants and high molecular weight olefins are useful as dispersants in lubricating oils and fuels and also may be used to prepare polysuccinimides and other post-treated additives useful in lubricating oils and fuels. The ratio of anhydride groups to the hydrocarbon groups in these novel copolymers is at least 1.3.
Claims11
A copolymer of an unsaturated acidic reactant and a high molecular weight olefin, wherein the copolymer has a ratio of anhydride groups to hydrocarbon groups of between 1.3 and 2.0, wherein the olefin is selected from the group consisting of alpha olefin and alkylvinylidene olefin, wherein the olefin has an average molecular weight of from 500 to 5000, and wherein the olefin has a sufficient number of carbon atoms such that the resulting copolymer is soluble in lubricating oil.
Dependencies are inferred from the claim text.