Carbocationic catalysts and process for using said catalysts

Details Carbocationic catalysts and process for using said catalysts Carbocationic catalysts and process for using said catalysts

C - Chemistry, Metallurgy

08

F

C08F 10/00 (2006.01) C08F 4/14 (2006.01) C08F 10/10 (2006.01) C08F 12/04 (2006.01) C08F 297/00 (2006.01) C08F 110/10 (2006.01)

Patent

CA 2203693

A living carbocationic catalyst composition comprising an initiator of a tertiary alkyl halide, a tertiary aralkyl halide or polymeric halide a co- initiator of a methylaluminum or methylboron compound, and a solvent medium with a dielectric constant between 2.5 and 7 is used to produce narrow molecular weight distribution polymers particularly isobutylene polymers.

On utilise une composition de catalyseur carbocationique vivant comprenant un initiateur constitué d'un halogénure d'alkyle tertiaire, d'un halogénure d'aralkyle tertiaire ou d'un halogénure polymère tertiaire, un co-initiateur constitué d'un composé méthylaluminium ou méthylbore, ainsi qu'un milieu à solvant avec une constante diélectrique comprise entre 2,5 et 7, afin de produire des polymères à répartition de poids moléculaire étroite, notamment des polymères d'isobutylène.

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