Lubricating oil containing viscosity index improver

A composition comprising a carbon-carbon backbone polymer containing residual unsaturation and bearing graft moieties derived from monomer containing ethylenic unsaturation and an epoxide moiety which polymer has been functionalized with, per mole of polymer, (a) 0.25-2 moles of a Mannich base formed by the reaction of (i) an aldehyde, (ii) a polyamine containing at least one primary or secondary amine group and (iii) a non-hindered phenol and with (b) 0.1-1.5 moles of N-vinyl pyrrolidone or a functionalizing polyamine bearing a Zerewitinoff active hydrogen atom bonded to a nitrogen atom.

A concentrate comprising a diluent-solvent and a composition comprising a carbon-carbon backbone polymer containing residual unsaturation, and bearing graft moieties derived from a graft monomer containing unsaturation and an epoxide moiety which graft polymer has been functionalized with, per mole of polymer, (a) 0.25-2 moles of a Mannich base formed by the reaction of (i) an aldehyde, (ii) a polyamine containing at least one primary or secondary amine group and (iii) a non-hindered phenol with (b) 0.1-1.5 moles of N-vinyl pyrrolidone or a functionalizing polyamine bearing a Zerewitinoff active hydrogen atom bonded to a nitrogen atom.

A lubricating composition comprising a major portion of a lubricating oil and a minor effective viscosity index improving portion of a composition comprising a carbon-carbon backbone polymer containing residual unsaturation, and bearing graft moieties derived from a graft monomer containing ethylenic unsaturation and an epoxide moiety which graft polymer has been functionalized with, per mole of polymer, (a) 0.25-2 moles of a Mannich base formed by the reaction of (i) an aldehyde, (ii) a polyamine containing at least one primary or secondary amine group and (iii) a non-hindered phenol and with (b) 0.1-1.5 moles of N-vinyl pyrrolidone or a functionalizing polyamine bearing a Zerewitinoff active hydrogen atom bonded to a nitrogen atom.

A graft polymer composition comprising a carbon-carbon backbone polymer containing residual unsaturation, and bearing graft moieties derived from a graft monomer containing ethylenic unsaturation and an epoxide moiety which graft polymer has been functionalized with (a) a Mannich base formed by the reaction of (i) an aldehyde, (ii) a polyamine containing at least one primary or secondary amine group and (iii) a non-hindered phenol and with (b) N-vinyl pyrrolidone.

A graft polymer composition comprising a carbon-carbon backbone polymer containing residual unsaturated containing moieties derived from monomer containing ethylenic unsaturation and an epoxide moiety which polymer has been functionalized with (a) a Mannich base formed by the reaction of (i) an aldehyde, (ii) a polyamine containing at least one primary or secondary amine group and (iii) a non-hindered phenol and with (b) N-vinyl pyrrolidone.

A concentrate comprising a diluent-solvent and a graft polymer composition comprising a carbon-carbon backbone polymer containing residual unsaturation, and bearing graft moieties derived from a graft monomer containing ethylenic unsaturation and a epoxide moiety which graft polymer has been functionalized with (a) a Mannich base formed by the reaction of (i) an aldehyde, (ii) a polyamine containing at least one primary or secondary amine group and (iii) a non-hindered phenol and with (b) N-vinyl pyrrolidone.