Additives useful as dispersants and/or detergents in lubricating oils, gasolines, marine crankcase oils and hydraulic oils are alkenyl or alkyl succinimides which have been modified by treatment with a polyamine-cyclic carbonate adduct. The additives are the reaction products obtainable by first (a) reacting a polyamine with a cyclic carbonate and thereafter (b) reacting the product of step (a) with an alkenyl or alkyl succinic anhydride.
                            在润滑油、汽油、船用曲轴箱油和液压油中用作分散剂和/或清洁剂的添加剂是烯基或烷基琥珀
酰亚胺,这些添加剂经过
多胺-环
碳酸盐加合物处理后进行改性。这些添加剂是通过以下方法得到的反应产物:首先 (a) 使
多胺与环
碳酸盐反应,然后 (b) 使步骤 (a) 的产物与烯基或烷基
琥珀酸酐反应。