Carl Walter Stuebe

US Patent:

40987086, Jul 4, 1978

Filed:

Jun 16, 1975

Appl. No.:

5/587513

Inventors:

Carl Walter Stuebe - Beachwood OH

Assignee:

The Lubrizol Corporation - Wickliffe OH

International Classification:

C10M 132

US Classification:

252 515A

Abstract:

Esters 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 esters 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 alkyl moiety is derived from pentaerythritol. Such esters are preferably prepared by the reaction of the corresponding organic hydroxy compound with a vic-hydroxyalkyl ester of the salicylic acid.