Amorphous Polyethylene by Tandem Action of Cobalt and Titanium Single-Site Catalysts

✍ Scribed by Claudio Bianchini; Marco Frediani; Giuliano Giambastiani; Walter Kaminsky; Andrea Meli; Elisa Passaglia

• Book ID: 102498263
• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 141 KB
• Volume: 26
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200500243

✦ Synopsis

Abstract

Summary: A variety of branched polyethylenes, spanning from semicrystalline LLDPE to completely amorphous, rubbery PE, was obtained from ethylene by homogeneous tandem catalysis using combinations of CoCl~2~(N) (1) (N = [1‐(6‐benzo[b]thiophen‐2‐yl‐pyridin‐2‐yl)‐ethylidlene)‐(2,6‐diisopropyl‐phenyl)‐amine) and [(η^5^‐C~5~Me~4~)SiMe~2~(__t__BuN)]TiCl~2~ (2) in the presence of MAO at 30 °C. The productivity reached a maximum of 4 570 kg PE (mol Ti · h)^−1^ at χ~Co~ = 0.50, yielding a rubbery material with d~25~ = 0.868 g · cm^−3^ and T~g~ = −55 °C.

Conversion of ethylene into branched polyethylene using Co^II^ iminopyridyl complex CoCl~2~(N) (1) and TiCl~2~[(η^5^‐C~5~Me~4~)SiMe~2~(__t__BuN)] (2).

magnified imageConversion of ethylene into branched polyethylene using Co^II^ iminopyridyl complex CoCl~2~(N) (1) and TiCl~2~[(η^5^‐C~5~Me~4~)SiMe~2~(__t__BuN)] (2).