(57) The present invention is directed to branched amido-amine dispersant additives useful
in oleaginous compositions formed by (a) reacting a first nitrogen-containing compound
(e. g., ammonia or an organic amine) with an alpha, beta-unsaturated compound of the
formula:
wherein W¹ is sulfur or oxygen, Y is -OR⁴, -SR⁴, or -NR⁴(R⁵), and R¹, R², R³, R⁴
and R⁵ are the same or different and are hydrogen or substituted or unsubstituted
hydrocarbyl, to form a first adduct containing unreacted -C(W¹)-Y groups; (b) reacting
the first adduct with a polyamine (e.g., a polyalkylene polyamine) to form a second
adduct containing unreacted -NH- groups (preferably primary amine groups) and comprising
a branched amido-amine oligomer; and (c) reacting the second adduct with a long chain
hydrocarbyl substituted mono- or dicarboxylic acid material comprising a polyolefin
of 300 to 10,000 number average molecular weight substituted with at least 0.3 mono-
or dicarboxylic acid producing moieties (preferably acid or anhydride moieties) per
polyolefin molecule.
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