Vapor phase synthesis of rubbery polymers

Details Vapor phase synthesis of rubbery polymers Vapor phase synthesis of rubbery polymers

C - Chemistry, Metallurgy

08

F

C08F 136/08 (2006.01) B01J 8/10 (2006.01) B01J 8/24 (2006.01) B01J 8/36 (2006.01) C08F 2/06 (2006.01) C08F 2/34 (2006.01) C08F 2/44 (2006.01) C08F 4/642 (2006.01) C08F 4/649 (2006.01) C08F 4/70 (2006.01) C08F 36/04 (2006.01) C08F 136/04 (2006.01) C08F 136/06 (2006.01) G09F 13/28 (2006.01) G09F 21/06 (2006.01)

Patent

CA 2212729

By utilizing the vapor phase polymerisation techniques of the present invention, numerous distinct and highly beneficial advantages are realized. For instance, cis-1,4-polybutadiene and high cis-1,4-polybutadiene rubber having a consistent and controllable molecular weight can be easily and practically prepared without utilizing a solvent. The supported catalyst is mixed prior to its introduction into the reaction zone. The supported, preformed catalyst system is introduced into the reaction zone (11) by feeding the catalyst into the reactor via catalyst feed line (27) at point (28) which is in the upper portion of the reaction zone.

La présente invention concerne l'utilisation de techniques de polymérisation en phase vapeur présentant de nombreux avantages très intéressants. Ainsi est-il possible, par exemple, de préparer facilement un cis-1,4-polybutadiène ainsi qu'un caoutchouc de cis-1,4-polybutadiène de masse moléculaire élevée régulière et modulable, sans utiliser de solvant. Le procédé, qui consiste à mélanger le catalyseur sur support préalablement à son introduction dans la zone de réaction, nécessite l'introduction du système catalyseur préformé sur support dans la zone de réaction (11) en acheminant le catalyseur dans le réacteur via une ligne d'amenée (27) du catalyseur, en un point (28) se situant dans la partie supérieure de la zone de réaction.

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