| 摘要 |
Amides of alkyl-substituted hydroxyaromatic carboxylic acids (especially alkyl-substituted salicylic acids) and the like, in which the alkyl substituent contains at least about 10 carbon atoms, are useful as dispersant additives for lubricants and fuels. Particularly useful are salicylamides in which the substituent is derived from propylene, 1-butene or isobutene and has a molecular weight of about 150-1750, and in which the amide moiety is derived from an alkylene polyamine. Such amides are preferably prepared by the reaction of the corresponding nitrogen-containing compound with a vic-hydroxyalkyl ester of the salicylic acid.
|
