| 摘要 |
The present invention relates to a process for the preparation of ethylene homopolymer or ethylene interpolymer, comprising contacting ethylene and optionally one or more C2-C20 olefins with a catalyst composition under polymerization conditions, wherein said catalyst composition is: a) a metal coordination complex comprising a metal atom of groups 3-10 or the Lanthanide series of the Periodic Table of the Elements and a delocalized pi -bonded moiety substituted with a constrain inducing moiety, said complex having a constrained geometry about the metal atom such that the angle at the metal atom between the centroid of the delocalized, substituted pi -bonded moiety and the center of at least one remaining substituent is less than such angle in a similar complex containing a similar pi -bonded moiety lacking in such constrain-inducing substituent, and provided further that for such complexes comprising more than one delocalized, substituted pi -bonded moiety, only one thereof for each metal atom of the complex is a cyclic, delocalized, substituted pi -bonded moiety, and b) an activating cocatalyst, characterized in that the process is a continuous process comprising continuously contacting said ethylene and optionally one or more C2-C20 olefins with said catalyst composition. In addition, the invention relates to ethylene homo-, co- or interpolymer obtainable by this process, and the use of said catalyst composition as a continuous ethylene homo-, co- or interpolymerization catalyst. <IMAGE> |
