Polymer production

C - Chemistry – Metallurgy – 08 – F

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C08F 210/06 (2006.01) C08F 297/08 (2006.01)

Patent

CA 2149543

2149543 9507943 PCTABS00036 In a gas phase, two stage process for the production of polypropylene copolymers having a good balance of impact strength and stiffness. Polymer cohesiveness, fouling and the production of gels in the second reactor are reduced by the addition to a substantially gaseous material passing through the first stage recycle loop of the first reactor, a small amount of at least one reduction component.

Processus en deux étapes en phase gazeuse pour la production de copolymères de polypropylène présentant un bon équilibre entre la résistance aux chocs et la rigidité. La cohésivité des polymères, l'encrassement et la production de gels dans le second réacteur sont réduits par l'ajout, à une matière essentiellement gazeuse qui passe par la boucle de recyclage de première étape du premier réacteur, d'une petite quantité d'au moins un composant réducteur.

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