Nitrogen-containing compounds
AssigneeExxon Chemical Patents Inc.
InventorsRobert Dryden Tack, Jacob Isaac Emert, Alan R Katritzky, Irina V Shcherbakova
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Abstract
Nitrogen-containing functionalised polymers may be obtained by reacting olefinically-unsaturated polymers and N-substituted amido or imido compounds in the presence of an acid catalyst. The compounds may be useful as oil additives, for example, as dispersants, in lubricating or fuel oil compositions. C.sub.2 to C.sub.25 olefins may be reacted with N-substituted amido or imido compounds to obtain dihydrooxazine compounds, which may be useful as chemical intermediates.
Claims15
A method of preparing an amidoalkylated polymer product comprising reacting, in the presence of an acid catalyst,
- (i) an olefinically unsaturated polymer having a carbon--carbon backbone and a number average molecular weight of from 700 to 100,000 and
- (ii) an acid amide or acid imide of which the amido or imido nitrogen atom, respectively, is substituted by a group --CHXR.sup.2 in which X is a hydroxy, hydrocarbyloxy or amido group free from aliphatic unsaturation and R.sup.2 is a hydrogen atom or a hydrocarbyl radical having from 1 to 11 carbon atoms.
A composition comprising a functionalized polymer of the general formula II or II" ##STR12## or of the general formula III' ##STR13## in which R.sup.1 is a hydrogen atom or a hydrocarbyl radical having from 1 to 12 carbon atoms, R.sup.3 and R.sup.4, which may be the same or different, are each hydrogen atoms or hydrocarbyl radicals and Polymer--represents a polymer chain derived from an olefinically unsaturated polymer having a carbon--carbon backbone and a number average molecular weight of from 700 to 100,000.
Dependencies are inferred from the claim text.