| 摘要 |
The present invention is directed to a lactone modified dispersant additive comprising at least one adduct of (A) a polyolefin of 300 to 10,000 number average molecular weight substituted with at least 0.3 (e.g., from about 1 to 4) dicarboxylic acid producing moieties (preferably acid or anhydride moieties) per polyolefin molecule, (B) an amido-amine or thioamido-amine characterized by being a reaction product of at least a polyamine and an alpha, beta-unsaturated compound of the formula: <CHEM> wherein X is sulfur or oxygen, Y is -OR<4>, -SR<4>, or -NR<4>(R<5>), and R<1>, R<2>, R<3>, R<4> and R<5> are the same or different and are hydrogen or substituted or unsubstituted hydrocarbyl, and a C5 - C9 lactone material. |
