Alkenyl silane functionalization of alkylstyrene...

Details Alkenyl silane functionalization of alkylstyrene... Alkenyl silane functionalization of alkylstyrene...

C - Chemistry, Metallurgy

08

F

C08F 8/42 (2006.01) C08F 12/08 (2006.01)

Patent

CA 2272346

There is provided a method of introducing ethylenically unsaturated functionality, into an alkylstyrene homopolymer or copolymer with an isoolefin, at the alkylbenzyl carbon atom comprising the steps of: forming a solution of the polymer in a hydrocarbon solvent; adding to the polymer solution an alkali metal (Na, K, Rb, Cs) alkoxide and an alkyl lithium compound to form a solution of a metalated intermediate; and adding a halodialkylalkenyl silane to the metalated polymer solution. Also provided are the ethylcnicaily unsaturated functionalized polymer derivatives made by the method, and the cross-linked derivatives thereof.

L'invention concerne un procédé permettant d'introduire une fonctionnalité éthyléniquement insaturée dans un homopolymère ou un copolymère d'alkylstyrène et d'iso-oléfine, au niveau de l'atome de carbone alkylbenzyle. Selon le procédé, on constitue une solution du polymère dans un solvant à base d'hydrocarbures; on ajoute à la solution de polymère un alcoxyde de métal alcalin (Na, K, Rb, Cs) et un composé d'alkyl-lithium, de façon à constituer une solution d'un intermédiaire métallé; et on ajoute un halodialkylalkényl-silane à la solution de polymère métallé. L'invention concerne également les dérivés du polymère fonctionnalisé éthyléniquement insaturé fabriqués selon ledit procédé, ainsi que leurs dérivés réticulés.

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