| abstract |
PROBLEM TO BE SOLVED: To provide a composition used as an additive which gives improved performance characteristics to a fuel or a lubricant. The composition comprises a treated amine, a hydrocarbyl succinic anhydride, a Mannich adduct derived from a hydrocarbyl-substituted phenol reacted with formaldehyde, an ethylene-propylene copolymer grafted with an ethylenically unsaturated carboxyl group. And a reaction product of a compound selected from the group consisting of a polymer, a copolymer of an unsaturated acid and a polyolefin, and a hydrocarbon polymer having an acid or ester functional group. The reaction product is oil soluble and has a number average molecular weight determined by gel permeation chromatography in the range of about 900 to about 50,000. The treated amine is obtained by reacting an aliphatic or aromatic amine containing at least one primary or secondary amino group with acrylonitrile or at least one homologue thereof and then reducing it to a primary amine. Is included. [Selection figure] None |