| abstract |
An oil-soluble, hydrolyzed, anionic-graft polymer of an anionically polymerizable nitrile monomer, preferably a C3-C24 vinyl cyanide monomer, e.g. acrylonitrile, and an anion of an oxidized copolymer of ethylene and at least one C3 to C50 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 and/or dispersant for lubricating oils or as an intermediate for derivatization, as by reaction with a nitrogen compound, to increase the oil additive activity. |