| abstract |
A dispersant that is a reaction product of a polyalkenyl-substituted mono- orndicarboxylic acid, anhydride or ester; and a polyamine, wherein the reaction productnhas from greater than about 1.3 to less than about 1.7 mono- or di-carboxylic acidnproducing moieties per polyalkenyl moiety, and the polyalkenyl moiety has a numbernaverage molecular weight of at least about 1800, and a molecular weight distributionn(M w /M n ) of from about 1.5 to about 2.0. |