abstract |
The present invention provides that the alkyl moiety of the aromatic compound is derived from at least one ethylene alpha-olefin copolymer having a number average molecular weight of 300 to about 20,000, wherein at least about 30% of the polymer chains contain terminal ethenylidene unsaturated groups. Oil-soluble lubricating oil additive comprising an alkyl substituted hydroxy aromatic compound with a Mannich base condensate of formaldehyde and amine. Mannich base condensates of the invention are useful as dispersants. |