| 摘要 |
Oil-soluble dispersant useful as luboil additive which comprises a polyolefin substituted dicarboxylic acid or anhydride, in which the number average molecular weight (Mn) of the polyolefin is from 1500 to 5000 and the molar equivalent ratio (as hereinbefore defined) of dicarboxylic acid groups to equivalent of polyolefin substituent is less than 1.3. The polyolefin substituted dicarboxylic acid or anhydride can be further reacted with amines or alcohols to form other useful dispersant additives. |
