Star polymers and process for producing the same

Details Star polymers and process for producing the same Star polymers and process for producing the same

C - Chemistry, Metallurgy

07

F

C07F 17/00 (2006.01) C07F 7/28 (2006.01) C08F 4/64 (2006.01) C08F 10/00 (2006.01) C08F 212/04 (2006.01) C08F 293/00 (2006.01) C08F 297/02 (2006.01) C08F 4/659 (2006.01) C08F 4/6592 (2006.01)

Patent

CA 2263994

Star polymers are obtained by polymerising vinyl aromatic monomers with a branching monomer component which contains at least two vinyl aromatic functional radicals in the presence of a catalyst obtained from (A) a transition metal complex of the II to the VIII secondary group; (B) a cation- forming agent; and (C) an optional aluminium compound.

L'invention concerne des polymères en étoile obtenus par polymérisation de monomères vinylaromatiques avec un bloc de base monomère ramifiant contenant au moins deux restes fonctionnels vinylaromatiques, en présence d'un catalyseur pouvant être obtenu à partir A) d'un complexe métallique de transition du sous-groupe II à VIII, B) d'un agent chimique formant des cations et C) éventuellement d'un composé aluminium.

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