Amidation of ester functionalized hydrocarbon polymers

C - Chemistry – Metallurgy – 08 – F

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C08F 8/32 (2006.01) C10L 1/236 (2006.01) C10L 1/238 (2006.01) C10L 1/2387 (2006.01) C10L 10/00 (2006.01) C10M 133/56 (2006.01)

Patent

CA 2189072

The present invention is directed to a process for preparing a polymeric amide which comprises the steps of: (A) reacting a mixture of (i) functionalized hydrocarbon polymer containing ester functional groups comprising at least one member selected from the group consisting of substituted alkyl ester functional groups, the substituted alkyl moiety containing at least one electron withdrawing substituent group, and aryl ester functional groups, the hydrocarbon polymer having a number average molecular weight of at least about 500 prior to functionalization, and (ii) an amine having at least one reactive -NH2 moiety, for a time and under conditions sufficient to form amide groups; and (B) removing from the mixture during step (A) hydroxyl compound released from the ester functional groups in forming the amide groups. The polymeric amides so produced are useful as fuel additives (e.g., detergents) and lubricating oil additives (e.g., dispersants).

La présente invention se rapporte à un procédé de préparation d'un amide polymère consistant à: (A) faire réagir un mélange (i) d'un polymère hydrocarboné fonctionnalisé contenant des groupes fonctionnels ester dont au moins un groupe est choisi parmi des groupes fonctionnels ester d'alkyle substitué, la fraction alkyle substitué contenant au moins un groupe de substitution retirant des électrons, et des groupes fonctionnels ester d'aryle, le polymère hydrocarboné présentant un poids moléculaire moyen en nombre d'au moins 500 avant sa fonctionnalisation, et (ii) d'une amine contenant au moins une fraction -NH¿2? réactive, cette réaction s'effectuant pendant une durée et dans des conditions suffisantes pour former des groupes amide; et (B) extraire du mélange, au cours de l'étape (A), un composé hydroxyle libéré des groupes fonctionnels ester au cours de la formation des groupes amides. Les amides polymères ainsi produits s'utilisent comme additifs pour carburant (p. ex. comme détergents) et additifs pour huile lubrifiante (p. ex. comme dispersants).

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