Methylene bridged metallocenes as olefin-polymerization catalyst components
申请人:Resconi Luigi
公开号:US06872863B2
公开(公告)日:2005-03-29
A new class of methylene-bridged metallocenes of formula (I), wherein M is a transition metal of group 3, 4, 5, 6, lanthanide or actinide; X is a monoanionic sigma ligand; R
1
can be alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl radicals; R
2
can be halogen, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl radical; p is 0-3; m is 0-2; and n is 0-4. Furthermore, the corresponding ligands, a new process for their preparation and catalysts systems containing said methylene-bridged metallocenes are described.
Methylene bridged metallocenes as olefin-polymerization-catalyst components
申请人:Basell Polyolefine GmbH
公开号:US06693156B1
公开(公告)日:2004-02-17
A new class of methylene-bridged metallocenes of formula (I), wherein M is a transition metal of group 3, 4, 5, 6, lanthanide or actinide; X is a monoanionic sigma ligand; R1 can be alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl radicals; R2 can be halogen, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl radical; p is 0-3; m is 0-2; and n is 0-4. Furthermore, the corresponding ligands, a new process for their preparation and catalysts systems containing said methylene-bridged metallocenes are described.
Methylene-Bridged Metallocenes with 2,2′-Methylenebis[1H-inden-1-yl] Ligands: Synthesis, Characterization, and Polymerization Catalysis of a Synthetically Simple Class ofC2- andC2v-Symmetricansa-Metallocenes
7-dimethyl-1H-inden-1-yl]}zirconium ([ZrCl2(5′)] is the most open. The mixture [ZrCl2(1′)]/methylalumoxane (MAO) is inactive in the polymerization of both ethylene and propylene, while the metallocenes with substituted indenyl ligands polymerize propylene to atactic polypropylene of a molecular mass that depends on the size of the alkyl or aryl groups at the 1,1′ positions of the ligand. Ethene is polymerized