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Fuel additives derived from amido-amines

  • US 5,238,466 A
  • Filed: 07/15/1991
  • Issued: 08/24/1993
  • Est. Priority Date: 10/07/1986
  • Status: Expired due to Fees
First Claim
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1. A process for producing a dispersant useful as an oil additive which comprises:

  • (a) providing a long chain hydrocarbyl substituted mono- or dicarboxylic acid producing material formed by reacting an olefin polymer of C2 to C10 monoolefin having a number average molecular weight of about 300 to 10,000 and at least one of a C4 to C10 monounsaturated dicarboxylic acid material and a C3 to C10 monounsaturated monocarboxylic acid material, said acid producing material having an average of at least about 0.3 dicarboxylic acid producing moieties, per molecule of said olefin polymer present in the reaction mixture used to form said acid producing material;

    (b) providing an amido-amine compound having at least one primary amino group prepared by reacting at least one polyamine with at least one alpha, beta-unsaturated compound of the formula;

    ##STR24## wherein X is sulfur or oxygen, Y is --OR4,--SR4, or --NR4 (R5) , and R1, R2, R3, R4 and R5 are the same or different and are hydrogen or substituted or unsubstituted hydrocarbyl; and

    (c) contacting the said acid producing material with said amido-amine compound under conditions sufficient to effect reaction of at least a portion of the primary amino groups on said amido-amine compound with at least a portion of the acid-producing groups in said acid producing material, to form said dispersant.

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