Six-coordinated dibenzyl Zr complex bearing an [OSSO]-type tetradentate ligand was synthesized, and the structure was fully characterized by NMR spectroscopy and X-ray crystallography. The zirconium complex has C(2) symmetry in solution. Owing to an effect of the cyclooctane ring structure, the combination of the zirconium complex and B(C(6)F(5))(3) or (Ph(3)C)[B(C(6)F(5))(4)] as the activator exhibited high activity toward polymerization of 1-hexene to yield highly isotactic poly(1-hexene).
Coordination Chemistry and Organic Synthesis Utilizing Cycloalkane-1,2-dithiol
ETHYLENIC POLYMERIZATION CATALYST AND METHOD FOR MANUFACTURING ETHYLENIC POLYMER
申请人:Ishi Akihiko
公开号:US20130035462A1
公开(公告)日:2013-02-07
A catalyst for homopolymerization of ethylene or copolymerization of ethylene and an α-olefin comprises a complex represented by Formula (1):
wherein n is 2 or 3; R
1
and R
2
are independently an optionally substituted alkyl group or a halogen atom; L is a ligand represented by CH
2
R
3
, a halogen atom, OR
4
, or NR
5
R
6
; R
3
is a hydrogen atom, an aromatic group, or a trialkylsilyl group; R
4
is a lower alkyl group having 1 to 6 carbon atoms; and R
5
and R
6
are independently a hydrogen atom or a lower alkyl group having 1 to 6 carbon atoms. A method for manufacturing an ethylenic polymer involves homopolymerization of ethylene or copolymerization of ethylene and an α-olefin in the presence of the catalyst. The present invention provides a highly active tetradentate post-metallocene complex for ethylenic polymerization and a method for manufacturing the ethylenic polymer using the catalyst containing the complex.
OLEFIN POLYMER PRODUCING METHOD, ETHYLENE POLYMER, AND MOLD PRODUCT
申请人:OCHI Naoko
公开号:US20130041119A1
公开(公告)日:2013-02-14
A method for producing an olefin polymer, including: polymerizing olefin monomers using the following substance (A1), the following substance (A2), and an activating agent (B):
the substance (A1): a complex represented by the following general formula (1-1) or (1-2)
the substance (A2): a transition metal compound represented by the following general formula (8) or a μ-oxo-type dimer of a transition metal compound represented by the general formula (8)