| 摘要 |
A post-treated polymeric dispersant which comprises reacting (I) a post-treating agent selected from a cyclic car-bonate, a linear mono-carbonate, a linear poly-carbonate, an aromatic polycarboxylic acid or an aromatic polycarboxylic anhy-dride or an aromatic polycarboxylic acid ester and (II) an oil-soluble lubricating oil additive composition prepared by the process which comprises reacting a copolymer, with at least one ether compound and with at least one aliphatic compound capable of re-acting with at least one monocarboxylic acid or ester thereof, or dicarboxylic acid, anhydride or ester thereof. |
