Polyakylene succinimides and post-treated derivatives thereof

摘要

A succinimide composition is prepared by reacting a mixture of (i) a polyalkenyl derivative, (ii) of an unsaturated acidic reagent an unsaturated acidic reagent copolymer, and (iii) a polyamine. The polyalkenyl derivative is produced by reacting an unsaturated acidic reagent with a polyalkene in the presence of a strong acid, preferably a sulfonic acid. The unsaturated acidic reagent copolymer is a copolymer of an unsaturated acidic reagent and an olefin. The succinimide composition has an improved fluorocarbon elastomer compatibility, improved dispersancy, hydraulytic stability and shear stress stability. It is used in lubricating oils and fuels.