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US 4,248,719 AGranted
Quaternary ammonium salts and lubricating oil containing said salts as dispersants
AssigneeTexaco Inc.
InventorsHarry Chafetz, Gary D. Lee
Life of this patent
Estimating the term…
Abstract
Quaternary ammonium salts prepared by reacting an alkenylsuccinimide with a monocarboxylic acid ester provide improved dispersancy in lubricating oils, as compared with the starting alkenylsuccinimides.
Claims8
A quaternary ammonium salt suitable as a detergent-dispersant in lubricating oils, said salt having the formula:
- ##STR4## wherein R is a substituted aryl group having from 6 to 10 carbon atoms;
- R.sub.1 is a lower alkyl group of 1 to 5 carbon atoms, R.sub.2 and R.sub.3 are the same or different alkyl groups having from 1 to 8 carbon atoms and R.sub.4 is an alkenylsuccinimidyl alkyl or an alkenylsuccinoxy alkyl group having from 60 to 200 carbon atoms.
Dependencies are inferred from the claim text.