Back to results
US 4,734,212 AGranted
Lubricating oil compositions containing bis-mannich base deposit inhibitors and a process for their preparation
AssigneeChevron Research Company
InventorJames J. Harrison
Life of this patent
Estimating the term…
Abstract
Disclosed are Bis-Mannich base deposit inhibitors; lubricating oil compositions containing these inhibitors and a process for preparing these inhibitors.
Claims7
A lubricating oil composition comprising an oil of lubricating viscosity and a lubricating oil degradation deposit inhibiting effective amount of a compound of the Formula I:
- ##STR14## wherein R.sub.1 is independently alkylene of from 1 to 4 carbon atoms;
- R.sub.2 is alkylene of from 2 to 6 carbon atoms;
- R.sub.3 and R.sub.4 are independently hydrocarbyl of from 1 to 30 carbon atoms with the proviso that the sum of all R.sub.3 and R.sub.4 hydrocarbyl carbon atoms is sufficient to render the compound of formula I oil-soluble;
- R.sub.5 is independently selected from the group consisting of hydrogen, alkyl of from 1 to 6 carbon atoms, phenyl and phenyl substituted with 1 to 2 substituents selected from hydroxy and alkyl of from 1 to 6 carbon atoms;
- and salts thereof.
2 more elements
A lubricating oil concentrate comprising from about 85 to 50 percent of an oil of lubricating viscosity and from about 15 to 50 percent of a compound of the Formula I:
- ##STR15## wherein R.sub.1 is independently alkylene of from 1 to 4 carbon atoms;
- R.sub.2 is alkylene of from 2 to 6 carbon atoms;
- R.sub.3 and R.sub.4 are independently hydrocarbyl of from 1 to 30 carbon atoms with the proviso that the sum of all R.sub.3 and R.sub.4 hydrocarbyl carbon atoms is sufficient to render the compound of formula I oil-soluble;
- R.sub.5 is independently selected from the group consisting of hydrogen, alkyl of from 1 to 6 carbon atoms, phenyl and phenyl substituted with 1 to 2 substituents selected from hydroxy and alkyl of from 1 to 6 carbon atoms;
- and salts thereof.
2 more elements
Dependencies are inferred from the claim text.