| abstract |
PROBLEM TO BE SOLVED: To provide a novel composition comprising polysuccinimide useful as a dispersant and an anti-adhesion agent in lubricating oil and hydrocarbon fuel, and a post-treated derivative. SOLUTION: The method comprises reacting a mixture under reaction conditions, wherein the mixture comprises a first copolymer of a first unsaturated acidic drug and a 1,1-disubstituted olefin, A second unsaturated acidic agent, consisting of 1-olefin, a second copolymer, and a polyamine, wherein the first unsaturated acidic agent and the second unsaturated acidic agent are the same or different, The method, wherein the mixture contains 0.1 to 1.5 equivalents of the polyamine per equivalent of acid groups of the first copolymer + acid groups of the second copolymer. |