Ashless dispersants
AssigneeExxon Chemical Patents Inc.
InventorsAntonio Gutierrez, Robert D. Lundberg, Robert A. Kleist
Life of this patent
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Abstract
According to the present invention, improved dispersants are provided which comprise adducts of (A) polymer-substituted mono- and dicarboxylic acid or anhydrides and (B) bis(para-amino cyclohexyl) methane oligomers, wherein the reactants are contacted in a reaction zone in the substantial absence of polar organic solvents.
Claims8
Dispersant adduct useful in lubricating oils comprising reaction products of (A) polymer-substituted mono- or dicarboxylic acid or anhydrides derived from the reaction of (i) polyolefin with (ii) monounsaturated carboxylic reactant and (B) bis (para-amino cyclohexyl) methane oligomers;
- said reaction being conducted in a manner and under conditions sufficient to formimide, amide or mixtures thereof.
Dependencies are inferred from the claim text.