摘要:
Metal complexes comprising a polydentate chelating group, catalysts and polymerization processes using the same for the polymerization of olefins, especially propylene, are disclosed.
摘要:
A catalyst and process of polymerizing olefins using it are described, the catalyst comprising a cocatalyst and a metal complex preferably of the formulas 4-9, wherein M is a group 4 metal, Z is a boron atom, and T is one of
摘要:
A Group 4 transition metal complex containing a boron or aluminum bridging group containing a nitrogen containing electron donating group, especially an amido group.
摘要:
Catalyst compositions comprising 1) one or more bimetallic Group 3-6 or Lanthanide metal complexes corresponding to the formula: wherein: M and M′ are independently Group 3, 4, 5, 6, or Lanthanide metals; L is a divalent group (or trivalent group if bound to Q) having up to 50 nonhydrogen atoms and containing an aromatic &pgr;-system through which the group is bound to M, said L also being bound to Z; L′ is a monovalent group or a divalent group (if bound to L″ or Q), or a trivalent group (if bound to both L″ and Q) having up to 50 nonhydrogen atoms and containing an aromatic &pgr;-system through which the group is bound to M′; L″ is a monovalent group or a divalent group (if bound to L′ or Q), or a trivalent group (if bound to both L′ and Q) having up to 50 nonhydrogen atoms and containing an aromatic &pgr;-system through which the group is bound to M′, or L″ is a moiety comprising boron or a member of Group 14 of the Periodic Table of the Elements, and optionally also comprising nitrogen, phosphorus, sulfur or oxygen, said L″ having up to 20 non-hydrogen atoms; Z is a moiety comprising boron or a member of Group 14 of the Periodic Table of the Elements, and also comprising nitrogen, phosphorus, sulfur or oxygen, said Z having up to 20 non-hydrogen atoms; X, X′ and X″ are as defined in the specification; Q is a divalent anionic ligand group bound at one terminus to either Z or L and bound at the remaining terminus to either L′ or L″, said Q having up to 20 nonhydrogen atoms; and x, x′, and x″ are independently integers from 0 to 3; and 2) one or more activating cocatalysts; wherein activating cocatalyst component 2) causes both metal centers, M and M′, of the one or more bimetallic metal complexes 1) to be catalytically active for the polymerization of addition polymerizable monomers.
摘要:
Disclosed is a process for preparing bridged Group 4 metal complexes containing a neutral diene ligand starting from the corresponding novel, metal diene containing complexes by reaction thereof with the divalent derivative of a bridged bidentate ligand compound. The novel, intermediate metal diene complexes, their formation from tetravalent metal salts and an integrated process combining both process steps are claimed.
摘要:
Biscyclopentadienyl, Group 4 transition metal complexes formed with conjugated dienes wherein the diene is bound to the transition metal either in the form of a &sgr;-complex or a &pgr;-complex in combination with strong Lewis acids, Bronsted acid salts, carbenium ion salts, salts containing a cationic oxidizing agent, or subjected to bulk electrolysis in the presence of compatible, inert non-coordinating anions form catalysts for polymerizing olefins, diolefins and/or acetylenically unsaturated monomers.
摘要:
Disclosed is a process for preparing bridged Group 4 metal complexes containing a neutral diene ligand starting from the corresponding novel, metal diene containing complexes by reaction thereof with the divalent derivative of a bridged bidentate ligand compound. The novel, intermediate metal diene complexes, their formation from tetravalent metal salts and an integrated process combining both process steps are claimed.
摘要:
Disclosed is a process for preparing bridged Group 4 metal complexes containing a neutral diene ligand starting from the corresponding novel, metal diene containing complexes by reaction thereof with the divalent derivative of a bridged bidentate ligand compound. The novel, intermediate metal diene complexes, their formation from tetravalent metal salts and an integrated process combining both process steps are claimed.
摘要:
Compositions comprising Group 4 metal complexes containing a diene moiety and activating cocatalysts are used as catalysts for polymerizing olefins, diolefins and/or acetylenically unsaturated monomers. Vinylidene aromatic monomers, particularly styrene are polymerized to form highly syndiotactic polymers.
摘要:
A process for the telomerization of butadiene comprises reacting 1,3-butadiene and an alkanol, in the presence of a catalyst promoter and an alkoxydimerization catalyst comprising a Group VIII transition metal and a triarylphosphine ligand, which includes one phenyl that is mono-ortho-alkoxy substituted and at least one other phenyl including at least one substituent that withdraws electrons from the phosphorus atom. The product includes an alkoxy-substituted octadiene, which may then be used to produce 1-octene. The catalyst shows improved stability, activity and selectivity toward the alkoxy-substituted octadiene.