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Multifunctional lubricant additive with Viton seal capability

  • US 4,973,412 A
  • Filed: 05/07/1990
  • Issued: 11/27/1990
  • Est. Priority Date: 05/07/1990
  • Status: Expired due to Fees
First Claim
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1. A lubricating oil composition comprising a major portion of a lubricating oil and a minor antioxidant--dispersant amount of a reaction product prepared by the process which comprises:

  • (a) reacting a polyethylene amine with an alkenyl succinic acid anhydride to form a mono- and/or bis-alkenyl succinimide;

    (b) adding an organic diacid to the mono- and/or bis-alkenyl succinimide, forming a coupled mono- and/or bis-alkenyl succinimide;

    (c) acylating the coupled mono- and/or bis-alkenyl succinimide with an unsaturated fatty acid or ester to form an acylated coupled mono- and/or bis-alkenyl succinimide; and

    (d) adding a nitroso-aromatic amine to said acylated coupled mono- and/or bis-alkenyl succinimide to form an enamine diphenylamine acylated coupled mono- and/or bis-alkenyl succinimide.

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