Bis(Phenoxy-Imine) Zr Complexes/Et3Al/Heteropoly Compound Catalyst Systems for Ethylene Polymerization

✍ Scribed by Hideki Bando; Yasushi Nakayama; Yoshiho Sonobe; Terunori Fujita

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 98 KB
• Volume: 24
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200350018

✦ Synopsis

Abstract

Bis(phenoxy‐imine) Zr complexes upon activation with Et~3~Al/(Ph~3~C)~m~H~n~[PMo~12~O~40~] · 8 H~2~O (average: m/n = 2:1) were demonstrated to be highly active catalysts for the polymerization of ethylene. One of the complexes formed narrow‐molecular‐weight distributed polyethylene ($\overline M _{\rm w} /\overline M _{\rm n}$ 1.45) with a very high activity (5640 kg‐PE · mol‐cat^−1^ · h^−1^), representing the first example of a MAO‐ and borate‐free, highly active, single‐site catalyst system based on a Group 4 transition metal complex and a heteropoly compound.

Catalysis of ethylene with bis(phenoxy‐imine) Zr complexes activated with Et~3~Al/(Ph~3~C)~m~H~n~[PMo~12~O~40~] · 8 H~2~O.

magnified imageCatalysis of ethylene with bis(phenoxy‐imine) Zr complexes activated with Et~3~Al/(Ph~3~C)~m~H~n~[PMo~12~O~40~] · 8 H~2~O.