852160-01-1Relevant academic research and scientific papers
PROCESS FOR PREPARING PROPYLENE COPOLYMERS COMPRISING C4-C12-ALPHA OLEFIN COMONOMER UNITS
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Page/Page column 55, (2020/01/10)
The present invention relates to a process for producing a copolymer of propylene, optionally ethylene, and at least one comonomer selected from alpha olefins having from 4 to 12 carbon atoms using a specific class of metallocene complexes in combination with a cocatalyst system comprising a boron containing cocatalyst and an aluminoxane cocatalyst, preferably in a multistage polymerization process including a gas phase polymerization step.
Asymmetric ansa-zirconocenes containing a 2-methyl-4-aryltetrahydroindacene fragment: Synthesis, structure, and catalytic activity in propylene polymerization and copolymerization
Nifant'ev, Ilya E.,Ivchenko, Pavel V.,Bagrov, Vladimir V.,Okumura, Yoshikuni,Elder, Michael,Churakov, Andrei V.
experimental part, p. 5744 - 5752 (2012/01/14)
A set of asymmetric bis-indenyl zirconium SiMe2-bridged ansa-complexes, containing 2-isopropyl-4-arylindenyl and 2-methyl-4- aryltetrahydroindacenyl fragments, have been synthesized. These complexes demonstrate better catalytic activity, stereoselectivty, and polymer molecular weight capability in propylene homo-and copolymerization in comparison to analogues without a tetrahydroindacenyl fragment.
ORGANOMETALLIC TRANSITION METAL COMPOUND, BISCYCLOPENTADIENYL LIGAND SYSTEM, CATALYST SYSTEM AND PREPARATION OF POLYOLEFINS
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Page/Page column 40, (2010/02/12)
The present invention relates to organometallic transition metal compounds of the formula (I) where Mis an element of group 3, 4, 5 or 6 of the Periodic Table of the Elements or the lanthanides, the radicals X are identical or different and are each a
