| abstract |
Additives useful as dispersants and/or detergents in lubricating oils and fuels, for example marine crankcase oils and hydraulic oils, are polyamino alkenyl or alkyl succinimides modified by reaction with a compound of the general formula:n wherein R 4 is a divalent hydrocarbyl group of from 2 to 30 carbon atoms with the proviso that the hydrocarbyl carbon atom bound to onen group is not also bound to the othern group, or -R5-( OR 5 )- p wherein R 5 is alkylene of from 2 to 5 carbon atoms and p is an integer of from 1 to 100; X is selected from bromo, chloro and -ORs wherein R 6 is alkyl of from 1 to 6 carbon atoms, phenyl or phenyl substituted by 1 or 2 substituents selected from chloro, bromo, nitro, alkyl of from 1 to 6 carbon atoms and trifluoromethyl; and m is independently an integer of from 0 to 1. The molar charge of said compound to the basic nitrogen of the succinimide should be in the range from 0.1:1 to 0.5:1. |