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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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7098285 |
Catalyst obtained by prepolymerization of polyolefin and olefin polymerization method using the same
The present invention provides a prepolymerized olefin polymerization catalyst and olefin polymerization method using the same. More particularly, the present invention provides a prepolymerized...
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7094723 |
Catalysts containing at least one heterocyclic ligand for improving the catalysts' performance of olefin polymerization
The present invention provides a non-metallocene catalyst comprising a complex having one or more ligands coordinated a transition metal. The catalyst contains substituents bonded to the transition...
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7094726 |
Catalyst composition and process for olefin polymerization and copolymerization using supported metallocene catalyst systems
A catalyst composition includes: A) a solid catalyst precursor containing a metallocene compound, a magnesium compound and a particulate polymeric material; and B) a cocatalyst containing aluminum...
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7094847 |
Metallocene compounds and use thereof in catalysts for the polymerization of olefins
A class of bridged or unbridged metallocene compounds is disclosed, wherein the cyclopentadienyl ligands have two or four adjacent substituents forming one or two alkylenic cycles of from 4 to 8...
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7091150 |
Synthetic polyisoprene rubber
The neodymium catalyst system prepared by the technique of this invention can be used in the polymerization of isoprene monomer into synthetic polyisoprene rubber having an extremely high...
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7087688 |
Magnesium dichloride-ethanol adduct and catalyst components obtained therefrom
A MgCl 2 ·mEtOH·nH 2 O adducts, where 3.4<m≦4.4, 0≦n≦0.7, characterized by an X-ray diffraction spectrum, taken under the condition set forth above, in which, in the range of 2θ...
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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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7084088 |
Lewis acid catalyst composition
A Lewis acid catalyst composition comprising a specific mixed medium and a Lewis acid catalyst, wherein the Lewis acid catalyst is at least one compound selected from the group consisting of...
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7084220 |
Catalyst system for preparing styrene polymer and method for preparing of styrene polymer using the same
The present invention relates to a catalyst system for preparing styrene polymer and a method of preparing styrene polymer using the same, more particularly to a catalyst system for preparing...
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7084221 |
Polymerization catalyst system containing polyether-modified aluminoxane
A modified aluminoxane is disclosed. Aluminoxane compounds are modified with glycol ethers or polyethers. The modified aluminoxanes are effective activators for single-site catalysts. Catalyst...
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7081427 |
Solid catalyst component for olefin polymerization
A solid catalyst component for olefin polymerization comprising titanium, magnesium and a compound of the general formula (I)
wherein R 1 and R 2 are independently a C 3 straight or branched...
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7078468 |
Polymerization catalyst system using di-sec-butyldimethoxysilane for preparation of polypropylene
It has been discovered that using di-sec-butyldialkoxysilanes, such as di-sec-butyldimethoxysilane (DSBDMS), as external electron donors for Ziegler-Natta catalysts can provide a catalyst system...
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7078362 |
Carbene donor-modified Ziegler-Natta catalysts
A modified Ziegler-Natta catalyst system comprising a titanium or vanadium compound, a magnesium compound, a carbene donor, and an aluminum compound is disclosed. The invention includes a process...
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7077977 |
Bulky borate activations
A discrete polyolefin catalyst activator is disclosed. A salient feature of invention borate-based activators is that at least one of the ligands on the borate non-coordinating anion (NCA)...
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7074736 |
Hydrozirconated matrix and process for polyolefin production
A hydrozirconated matrix for the production of polyolefins is disclosed. The hydrozirconated matrix is prepared from the reaction of an organozirconium composition and an olefin based material. A...
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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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7071137 |
Method of making a ziegler-natta catalyst
A method for making a Ziegler-Natta catalyst support includes the steps of contacting a fumed silica with a surface modifying agent such as a compound having the formula RMgX MgR′R″ wherein R,...
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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 R a —CH═CH—R b , in which R a and R b are identical or different and are...
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7071276 |
Process to produce polymers
A process to produce ethylene polymers is provided.
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7067451 |
Soluble magnesium complexes useful for the production of polyolefin catalysts and catalysts prepared therewith
A method of forming a polyolefin catalyst component includes halogenating metal complexes. The metal complexes result from reacting a metal alkoxide with an alcohol-ether. A particular non-limiting...
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7064096 |
Dual catalyst on a single support
Bimodal polyolefins having a reverse or partial reversed comonomer incorporation may be prepared in the presence of a dual catalyst on the same support wherein each catalyst has a different...
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7060646 |
Supported catalyst composition for polymerization of olefins, method for preparing the same and process for polymerization using the same
Supported catalyst composition for polymerization of olefins comprising: (i) a titanium compound, a magnesium compound and at least one electron donor compound; (ii) a chlorine containing polymer...
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7060763 |
Magnesium dichloride-ethanol adducts and catalyst components obtained therefrom
The present invention relates to a MgCl 2 .mEtOH adduct in which m is from 2.5 to 3.2 optionally containing water up to a maximum of 1% wt based on the total weight of the adduct, characterized by...
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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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7049263 |
Process for producing catalyst for α-olefin polymerization and process for producing α-olefin polymer
There are provided a process for producing a catalyst for α-olefin polymerization, which comprises the step of contacting (1) a solid catalyst component having Ti, Mg and a halogen as essential...
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7045583 |
Olefin polymerization catalyst system
This invention relates to a catalyst precursor compound comprising a tridentate phenoxy-amide-amine group bound to a group 3 to 12 metal or lanthanide metal. In particular, this invention relates...
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7045481 |
Nanocatalyst anchored onto acid functionalized solid support and methods of making and using same
Supported catalysts include a solid support such as silica that is functionalized to have inorganic acid functional groups attached thereto. Active catalyst particles are supported on the...
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7045479 |
Intermediate precursor compositions used to make supported catalysts having a controlled coordination structure and methods for preparing such compositions
Intermediate precursor compositions for use in manufacturing supported reactive catalysts having a controlled coordination structure, and methods for manufacturing such precursor compositions are...
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7045478 |
Method of producing a catalyst for ethylene homo-and co-polymerization
The present invention relates to a catalyst for homo-polymerization or co-polymerization of ethylene, or more particularly to a solid complex titanium catalyst for homo-polymerization or...
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7041756 |
Catalyst component comprising a metallocene with two tetrahydroindenyl ligands for producing a polyolefin
Provided is a catalyst component for producing a polyolefin, which catalyst component comprises a metallocene catalyst having a structure according to formula (I): (THI) 2 R″MQ p , wherein each...
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7041759 |
Method for the preparation of well-defined metal acetamidinate-based catalysts on solid supports
An olefin polymerization pre-catalyst, an activated catalyst and a process for preparing the catalysts are described herein. The pre-catalyst has the formula:
wherein the groups M and R 1 –R...
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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...
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7037872 |
Metallocene catalysts containing a cyclopentadienyl ligand substituted by a siloxy or germiloxy group containing an olefinic residue
The invention relates to a metallocene catalyst in which the metal is coordinated by any η 5 cyclopentadienyl ligand characterised in that said ligand is directly or indirectly substituted by a...
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7037987 |
Olefin polymerization catalyst and polymerization process
A polymerization catalyst for the polymerization and copolymerization of olefin monomers and the copolymerization of olefin monomers with other monomers selected from, for example, norbornenes and...
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7033970 |
Process for preparing a diether-based catalyst component
A process for preparing a diether-based catalyst component in which: a) a slurry is obtained by contacting a solid support comprising a magnesium halide or a precursor thereof, one or more...
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7022640 |
1,3-diethers and components and catalysts for the polymerization of olefins, containing said diethers
Cyclopolyenic 1,3-diethers wherein the carbon atom in position 2 belongs to a particular cyclic or polycyclic structure containing two or three unsaturations, solid catalyst components and...
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7022783 |
Group III-B metal catalyst system
The subject invention relates to a technique for synthesizing rubbery non-tapered, random, copolymers of 1,3-butadiene and isoprene. These rubbery copolymers exhibit an excellent combination of...
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7022782 |
Homogeneous type solid catalyst component or homogeneous type solid catalyst, process for production thereof and process for producing addition polymer with the same
A process for producing a homogeneous type solid catalyst component or a homogeneous type solid catalyst comprising a step for removing a fine-powdery component and/or a shapeless component...
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7019097 |
Process for the (co)polymerization of ethylene
A process for the (co)polymerization ethylene, optionally in mixtures with olefins CH═CHR in which R is hydrogen or a hydrocarbyl radical with 1–12 carbon atoms, carried out in the presence of...
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7005487 |
Catalyst system for the polymerization of olefins
A solid catalyst component for the polymerization of olefins, comprising: an inert porous support, Mg, Ti, halogen and an electron donor selected from succinates of formula (I) wherein the radicals...
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7005398 |
Olefin polymerization catalyst, catalyst component for olefin polymerization, method of storing these, and process for producing olefin polymer
A catalyst is used which comprises a cocatalyst component wherein a non-coordinating ion-containing compound is chemically bonded to a fine particulate carrier, together with a metallocene compound...
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7002031 |
Preparation of silicon-bridged metallocene compounds
A process for obtaining silicon-bridged metallocene compounds comprising the following steps:
a) reacting, at a temperature of between −10° C. and 70° C., the starting ligand with about...
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7001862 |
Catalyst composition for polymerization of olefins and method for preparing the same
The present invention relates to a catalyst composition for polymerization of olefins comprising: (a) a solid catalyst pre cursor comprising at least one vanadium compound, at least one magnesium...
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7001968 |
Olefin polymerization processes and products thereof
A novel loop/slurry olefin polymerization process is provided which produces ultra-high molecular weight ethylene homopolymer.
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6998449 |
Latent metallocene catalyst systems for olefin polymerization
A metallocene catalyst may be temporarily and reversibly passivated by contact with an effective amount of a passivating compound selected from the group of oxygen, oxygen-containing compounds, and...
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6998363 |
Polyolefin catalyst component using non-covalent interactions
An olefin polymerization catalyst system is prepared from a catalyst of formula I or II:
R 1 –R 7 and R 1 –R 12 in formulae I and II, respectively, are each independently —H, -halo,...
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6995279 |
Metallocene compounds, processes for the production of olefin polymers using catalysts containing the compounds, and olefin polymers produced by the processes
Metallocene compounds represented by the following general formula (1):
Y q KLMX 2 (1)
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6995109 |
Method of making a bimetallic catalyst with higher activity
Methods of preparing bimetallic catalysts are disclosed. The methods include the steps of providing a supported non-metallocene catalyst, contacting a slurry of the supported non-metallocene...
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6992036 |
Catalyst systems, method for preparing and using same in a polymerization process
A polymerization catalyst system and process, which utilizes a Group 14 and Group 16 containing non-crystalline compound to solubilize or emulsify polymerization catalyst components, is disclosed.
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