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8143183 |
Nano-linked metallocene catalyst compositions and their polymer products
The present invention provides polymerization catalyst compositions employing novel dinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such...
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8088878 |
Hydrosilylation reactions activated through radiation
η-cyclopentadienyl-tri(σ-hydrocarbyl) platinum compounds in which the cyclopentadienyl ring is linked to a hydrolysable silyl group by an alkylene group are effective light-activated h...
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8071700 |
Borohydride metallocene complex of a lanthanide, catalytic system including said complex, polymerization method using same and ethylene/butadiene copolymer obtained using said method
A borohydride metallocene complex of a lanthanide, its process of preparation, a catalytic system incorporating a borohydride metallocene complex and a process for the copolymerization of olefins...
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8071800 |
Borohydride metallocene complex of a lanthanide, catalytic system including said complex, polymerization method using same and ethylene/butadiene copolymer obtained using said method
A borohydride metallocene complex of a lanthanide, its process of preparation, a catalytic system incorporating it, a process for the copolymerization of olefins employing this catalytic system and...
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7982064 |
Method for preparing ortho-substituted aminoferrocenes
The present disclosure relates to a method for preparing an ortho-substituted aminoferrocene comprising reacting an aminoferrocene with a Lewis acid and a lithiating reagent in the presence of an...
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7951970 |
Process for recycling cyclopentadienyl derivatives and preparing metallocenes from recycled, substituted cyclopentadienyl derivatives
The present invention relates to a process for recycling cyclopentadienyl derivatives of the formulae (I) and (I′), a process for preparing metallocenes of the formula (III) from cyclopentadienyl d...
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7851569 |
Rare earth metal complex, polymerization catalyst, and process for producing polymer
A rare earth metal complex represented by the formula (1): in which A represents a Group 14 element of the periodic table, Cp represents a group having a substituted or unsubstituted...
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7851644 |
Heterocyclic metallocenes and polymerization catalysts
A new class of heterocyclic metallocenes, a catalytic system containing them and a process for polymerizing addition polymerizable monomers using the catalytic system are disclosed; the...
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7709598 |
Fluorinated alkyl fluorophoshoric acid salts of onium and transition metal complex
To obtain a polymerization initiator (acid generating agent) having excellent power for initiation of cationic polymerization without containing arsenic or antimony. Provided is a specific onium...
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7671223 |
Process for the racemoselective preparation of ansa-metallocenes
The present invention relates to a process for the racemoselective preparation of ansa-metallocene complexes of the formula (I) which comprises reacting a ligand starting compound of the formula...
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7645844 |
Transition metal complexes, catalyst compositions containing the same, and methods for preparing ethylene homopolymers or copolymers of ethylene and α-olefins using the same
The present invention relates to a transition metal complex and a transition metal catalyst composition comprising the same for the preparation of an ethylene homopolymer or a copolymer of ethylene...
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7635783 |
Meso-selective synthesis of ansa-metallocenes
The present invention relates to a process for the meso-selective preparation of ansa-metallocene complexes of the formula (I), which comprises reacting a ligand starting compound of the formula...
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7619106 |
Preparation of partially hydrogenated rac-ansa-metallocene complexes
The invention relates to a process for preparing hydrogenated or partially hydrogenated, racemic ansa-metallocene complexes by reacting bridged or unbridged transition metal complexes with alkali...
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7618952 |
Silicon compounds with microbiocidal activity
Fungicidal compounds of formula (I): where X is O or S; RING is phenyl or thienyl; Het is a 5- or 6-membered heterocyclic ring containing one to three heteroatoms, each independently selected from...
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7615660 |
Production process of alkoxy-titanium complex
The present invention provides a process for producing an alkoxy-titanium complex of formula (2) by reacting a titanium halide complex of formula (1) with an alkaline earth metal alkoxide: wherein...
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7601666 |
Olefin polymerization catalyst system and process for use thereof
A compound represented by the formula: where: M is a transition metal selected from group 4 of the periodic table;each R1 is independently selected from the group consisting of hydrogen,...
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7592401 |
Multinuclear half metallocene catalyst and method for preparing syndiotatic polystyrene using the same
Disclosed is a multinuclear transition metal half metallocene catalyst having a multinuclear half metallocene structure in which a transition metal of groups 3 to 10 on periodic table is connected...
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7592404 |
Half metallocene catalyst and process for preparing syndiotactic styren polymer using the same
The present invention relates to a transition metal half metallocene catalyst with a noble structure for preparing syndiotatic styrene polymer having high activity, superior stereoregularity, high...
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7589160 |
Process for preparing 1-butene polymers
A process for obtaining 1-butene polymers comprising the step of contacting under polymerization conditions 1-butene and optionally ethylene, propylene or said alpha-olefin, in the presence of a...
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7569713 |
Hydrogenated catalyst
The invention discloses a method for making a hydrogenated metallocene catalyst component comprising the steps of: 1. Providing a compound comprising at least one aromatic group; 2. Hydrogenating...
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7569646 |
Group IVB transition metal compounds
The invention is a Group IVB transition metal compound which may be employed in the polymerization of olefins to produce high molecular weight polymers.
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7547796 |
Organometallic compounds, processes for the preparation thereof and methods of use thereof
This invention relates to organometallic precursor compounds represented by the formula (Cp(R′)x)yM(H)z-y, a process for producing the organometallic precursor compounds, and a method for d...
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7544825 |
Preparation of siloxy-bridged metallocenes
A method for making siloxy-bridged ligand precursors and metallocene complexes is disclosed. Indanone enolates react with cyclopentadienylsilyl compounds to produce ligand precursors, which are...
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7468452 |
Process for one-pot synthesis of 1,1-diphenyl-1-(3-substituted-cyclopentadienyl)-1-(2,7-di-t-butyl-fluoren-9-yl)methane type ligands
The present invention is directed to a method of making a ligand which can be used to form an ansa-metallocene. Further, the present invention is directed to a method of making the...
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7468451 |
Process for the production of halide metallocene compounds
Process for preparing halide metallocene compounds comprising the step of reacting the dialkyl derivative with a halogenating agent of formula R3xTLw wherein: L is chlorine, iodine or bromine; R3...
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7393965 |
Crosslinked metallocene compound for olefin polymerization and method of polymerizing olefin with the same
The bridged metallocene compound or the olefin polymerization catalyst which comprises the compound, enables high polymerization activity in polymerizing one or more monomers selected from ethylene...
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RE40121 |
Transition metal compound
The present invention relates to zwitterionic neutral transition metal compounds. The compounds are suitable as catalyst components for the polymerization of olefins.
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7329768 |
Chemical vapor deposition precursors for deposition of tantalum-based materials
Tantalum precursors suitable for chemical vapor deposition of tantalum-containing material, e.g., tantalum, TaN, TaSiN, etc., on substrates. The tantalum precursors are substituted cyclopentadienyl...
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7307177 |
Metallocene complexes, their synthesis and use in catalyst systems for olefin polymerization
A metallocene complex is represented by the the formula (CpR5)nMXk where Cp (each occurrence) is a cyclopentadienyl group; each of the five R substituents on the or each cyclopentadienyl group is...
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7250478 |
Silicon containing cyclopentadienyl ring for metallocene catalyst components
The present invention refers to a metallocene catalyst component for producing polyolefins according to formula (I) R″s (CpRn)g (CpRn) M Q3-g (I) or according to formula (II) R″(CpRn)MeXQ (II) whe...
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7247595 |
Supported metallocene catalyst and olefin polymerization using the same
A metallocene compound represented by the following Chemical Formula 1: wherein M is a transition metal of Group 4;Cp denotes a cyclopentadienyl ring unsubstituted or substituted by hydrogen,...
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7241849 |
Group III bridged metallocene based on cyclopentadienyl-fluorenyl ligands
The present invention discloses a metallocene catalyst component of formula (Flu-R″-Cp)M(η3-C3R′5)(ether)n (I) wherein Cp is a cyclopentadienyl, substituted or unsubstituted, Flu is a fluo...
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7241903 |
Metallocenes, use in catalyst system for producing olefin polymers
A metallocene compound of formula (I): wherein M is zirconium, titanium and hafnium; X is a hydrogen atom, a halogen atom or a hydrocarbon radical; R1 is a linear C1-C20-alkyl radical; R2 is a...
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7238818 |
Heterocyclic metallocenes and polymerization catalysts
A new class of heterocyclic metallocenes, a catalytic system containing them and a process for polymerizing addition polymerizable monomers using said catalytic system are disclosed; the...
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7223878 |
Reduction of concentration of inorganic by-products and organometallic by-products in the preparation of metallocenes and economical recovery of the starting materials used
A process for separating inorganic and organometallic by-products from a mixture comprising at least one organometallic transition metal compound as product and at least one organometallic...
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7205422 |
Volatile metal β-ketoiminate and metal β-diiminate complexes
Metal ketoiminate or diiminate complexes, containing copper, silver, gold, cobalt, ruthenium, rhodium, platinum, palladium, nickel, osmium, or indium, and methods for making and using same are...
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RE39561 |
Metallocenes containing ligands of 2-substituted indenyl derivatives, process for their preparation, and their use as catalysts
The novel metallocenes of the formula I in which, preferably, M1 is Zr or Hf, R1 and R2 are alkyl or halogen, R3 and R4 are hydrogen, R5 and R6 are alkyl or haloalkyl,...
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7193099 |
Racemoselective preparation of isolable ansa-metallocene biphenoxide complexes
The invention relates to a process for preparing racemic metallocene biphenoxide complexes by reacting bridged transition metal complexes with cyclopentadienyl derivatives of alkali metals or...
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7148356 |
Process for the catalytic synthesis of biaryls and polymers from aryl compounds
A process for producing organic substituted aromatic or heteroaromatic compounds including biaryl and biheteroaryl compounds in a two-step reaction. In the first step, the aromatic or...
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7141690 |
Transition metal complexes, ligands, polymerization catalysts for olefins, and process for production of olefin polymers
A transition metal complex represented by the formula (1): wherein M is a Group 4 transition metal, A is a Group 16 element, B is a Group 14 element, n is an integer of 0 or 1, R1, R2, R3 and R4...
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7122498 |
Metallocenes and catalyst compositions derived therefrom
Metallocenes and catalyst systems for olefin polymerization derived therefrom. The metallocenes may be represented by the formula: wherein M1 preferably is zirconium or hafnium; and R12 is...
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7115761 |
Process for the production of monohalide or dihalide metallocene compounds
A process for preparing dihalide or monohalide metallocene compounds comprising contacting a compound of formula (II) (Cp)(ZR1m)n(A)rML′y (II) wherein Cp is a cyclopentadienyl radical; (ZR1m)n is a...
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7098354 |
Racemoselective synthesis of rac-diorganosilylbis(2-methylbenzo[e]indeyl)zirconium compounds
The present invention relates to a specific process for the diastereoselective synthesis of rac-diorganosilylbis(2-methylbenzo[e]indenyl)zirconium compounds of the formula I, by reacting the...
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7087773 |
Group 4 metal complexes containing 4-aryl-substituted, tricyclic indenyl derivatives
Group 4 metal constrained geometry complexes comprising tricyclic 4-arylsubstituted indenyl ligands, especially 1,5,6,7-tetrahydro-4-aryl-s-indacen-1-yl ligands, catalytic derivatives thereof,...
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7081543 |
Bridged biscyclopentadienyl ligands and method of preparation
The present invention relates to ligands and the synthesis of those ligands for use in metallocene complexes. More particularly, the present invention relates to the synthesis of diarylsilyl...
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7074865 |
Azaborolyl group 4 metal complexes, catalysts and olefin polymerization process
Metal complexes, catalysts derived therefrom, and polymerization processes using the same, characterized by the presence of one or more nitrogen and boron containing, anionic 5-membered cyclic...
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RE39156 |
Process for the preparation of polyolefins
A process for the preparation of an olefin polymer by polymerization or copolymerization of an olefin of the formula Ra—CH═CH—Rb, in which Ra and Rb are identical or different and are a hydro...
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7049453 |
“Constrained geometry” metallocenes, method for the production thereof and use of the same for the polymerisation of olefins
The present invention relates to a process for preparing specific transition metal compounds, novel transition metal compounds and also catalyst systems and their use for the homo- or...
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7038070 |
Preparation of preparing substituted indanones
A process for the preparation of indanones of the formula II from indanones of the formula I or of indanones of the formula IIa from indanones of the formula Ia comprises reacting an indanone of...
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7026494 |
Polymerization catalysts for producing high melt index polymers without the use of hydrogen
Various catalyst compositions including the contact product of at least one ansa-metallocene compound, at least one organoaluminum compound, and at least one activator-support are disclosed....
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