Patent ID: 6770605
Filing Date: 2004-08-03
Classification: C08F,C10M,C10N

Abstract:
A composition suitable for reducing engine sludge and degradation of elastomer seals comprisinga major amount of an oil of lubricating viscosity and a minor amount of a nitrogen-containing dispersant wherein the nitrogen containing dispersant is a reaction product of (I) a hydrocarbyl-substituted succinic acylating agent, wherein 15 to about 20 mole percent of the individual molecules thereof have a hydrocarbyl substituent with a molecular weight of less than 500; wherein the hydrocarbyl substituent is a polymeric species consisting essentially of olefin monomer units of at least 3 carbon atoms; and (II) at least one polyamine, wherein the polyamine is (a) a polyalkylene amine containing at least one Hâ€”N< group; or (b) a condensate of (i) a polyalkylene amine containing at least one Hâ€”N< group with (ii) at least one alcohol containing at least one ether group, amine group, nitro group, or additional alcohol group; wherein in said polyamine (a) or condensed polyamine (b) no more than about 20 mole percent of the molecules contain 6 or fewer nitrogen atoms.