Abstract: The present invention is directed to oil-soluble lubricating oil additives comprising Mannich Base condensates of (A) an ethylene-alpha-olefin polymer substituted mono- or dicarboxylic acid material, (B) an optionally alkyl-substituted N-hydroxyaryl compound, (C) an aldehyde, and (D) an amine, wherein the polyer moiety of the mono- or dicarboxylic acid material is derived from at least one terminally unsaturated ethylene alpha-olefin copolymer of 300 to 10,000 number average molecular weight, wherein the terminal unsaturation comprises ethenylidene unsaturation. The Mannich Base condensates of this invention are useful as dispersants.

Abstract: The present invention is directed to oil-soluble lubricating oil additives comprising Mannich Base condensates of an alkyl substituted hydroxy aromatic compound with formaldehyde and an amine, wherein the alkyl-moiety of the aromatic compounds is derived from at least one ethylene alpha-olefin copolymer of 300 to 10,000 number average molecular weight, wherein at least about 30% of the polymer's chains contain terminal ethenylidene unsaturation. The Mannich Base condensates of this invention are useful as dispersants.

Abstract: Thiocarbamyl derivatives, including thioureas and thiocarbamic esters derived from the reaction of an alkenyl isothiocyanate with an amine and alcohol or thio, respectively, have utility as an additive for hydrocarbons, particularly fuels and mineral lubricating oils whereby enhanced anticorrosion, oxidation inhibition and/or dispersancy activity is imparted to said hydrocarbons.

Abstract: An ene adduct and adduct derivatives of a C.sub.3 -C.sub.24 ethylenically unsaturated nitrogen-containing reactant, e.g. acrylonitrile, and a copolymer of ethylene, at least one C.sub.3 to C.sub.50 alpha-monoolefin and at least one non-conjugated diene, said adduct containing from about 0.005 to 7% by weight nitrogen and having a number average molecular weight of from about 1000 to 500,000, in oil-soluble form have utility as a multi-functional V.I. improver for lubricating oils.

Abstract: Preparation of aminated polymeric additives useful as oil additives, for example as dispersants for hydrocarbon fuels and lubricants, and as multifunctional dispersant-viscosity index improvers for lubricants, by the reaction of amine with a halogen containing copolymer of ethylene, a C.sub.3 to C.sub.18 straight or branched chain .alpha.-olefin and a C.sub.5 to C.sub.14 acyclic or alicyclic nonconjugated diolefin, said halogen containing copolymer being prepared by the halogenation of said copolymer.