IMPROVED DISPERSANT BY TREATMENT WITH MALEIC ANHYDRIDE

摘要

A modified dispersant is prepared by the reaction of an acylated amine dispersant containing at least one reactive nitrogen atom, prepared by the reaction of an amine with a hydrocarbyl-substituted acylating agent; and an amount of maleic anhydride or an equivalent thereof sufficient to react with at least a portion of the nitrogen atoms in said acylated amine dispersant. Preferably the reaction with maleic anhydride or its equivalent is conducted simultaneously with the reaction of the amine and the hydrocarbyl acylating agent to form the acylated amine dispersant.