| 摘要 |
A lubricating oil additive composition prepared by a process which comprises the steps of: (A) reacting a polyalkenyl succinic acid or a polyalkenyl succinic anhydride with at least one polyalkylene polyamine, having at least three nitrogen atoms, thereby producing a succinimide or succinamide or mixtures thereof; (B) reacting the product of step (A) with a phthalic anhydride or naphthalic anhydride post-treating agent or mixtures thereof, thereby producing an initial.post-treated succinimide or succinamide or mixtures thereof; and (C) reacting the product of step (B) with a cyclic carbonate thereby producing a final post-treated succinimide or succinamide or mixtures thereof, wherein at least one basic nitrogen remains in the final post-treated succinimide or succinamide or mixtures thereof. |
