Abstract: The present invention relates to novel multifunctional viscosity modifiers comprising a mixture of derivatized ethylene-alpha olefin copolymers, A and B. Said A copolymer comprising from about 30 to about 60 weight percent monomer units derived from ethylene and said B copolymer comprising from about 60 to about 80 weight percent units derived from ethylene.

Abstract: Oil compositions comprising a lubricating oil and an oil-soluble hydrocarbon polymeric viscosity index improver such as ethylene-propylene copolymers are substantially haze-free when said composition contains an anti-hazing amount of an oil-soluble strong acid containing a hydrogen dissociating moiety which has a pK of less than about 2.5, e.g. a C.sub.25 to C.sub.70 hydrocarbyl substituted sulfonic acid. The invention also relates to the process for preparing said compositions.

Abstract: An oil-soluble anionic-graft polymer of an anionically polymerizable monomer, preferably an ethylenically unsaturated nitrogen-containing monomer, e.g. acrylonitrile, and an anion of an oxidized copolymer of ethylene and at least one C.sub.3 to C.sub.50 alpha monoolefin, e.g. propylene, said anionic-graft polymer in its preferred form containing from about 0.005 to 2% by weight nitrogen and having a number average molecular weight of from about 1000 to 500,000, has utility as a multifunctional V.I. improver or dispersant 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.

Abstract: Hydroxylated polymeric additives useful as additives, for example as dispersants for lubricants and hydrocarbon fuels, and multi-functional dispersant-viscosity index improvers for lubricants, can be prepared by the reaction of metal salts of polyols with a halogen containing olefin polymer, particularly ethylene containing polymers, such as: the halogenated terpolymer 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; a terpolymer of ethylene, a C.sub.3 to C.sub.18 alpha olefin and a C.sub.5 to C.sub.14 halogen-containing olefin; halogenated copolymers of ethylene and a C.sub.3 to C.sub.18 straight or branched chain .alpha.-olefin; etc.