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7525009 |
Trimerisation of olefins
The invention describes a process for trimerisation olefins, which process includes the step of contacting an olefinic feedstream with a catalyst system which includes a transition metal compound...
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7465688 |
Process for the isomerization of metallocene compounds
An isomerization process comprising the step of contacting a slurry or a solution comprising the meso or meso-like form of one or more bridged metallocene compounds of group 4 of the Periodic Table...
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7365214 |
Process for the preparation of cyclic carbonates
The present invention provides an improved process for the preparation of cyclic carbonates which comprises reacting an olefins or its epoxide with carbon dioxide or a mixture of oxygen-containing...
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7307130 |
Polymerization reactor operability using static charge modifier agents
The present invention relates to a catalyst composition and a method for making the catalyst composition of a polymerization catalyst and a static charge modifier. The invention is also directed to...
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7214638 |
Olefin polymerization catalyst composition comprising group 13 amide derivatives
Catalyst compositions that are highly tolerant of catalyst poisons for use in addition polymerizations comprising a catalytic derivative of a Group 4 metal complex, a cocatalyst, and a Group 13...
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7208559 |
Ethylened polymer and molded object obtained therefrom
An ethylene-based polymer which is an ethylene/C4 to C10 α-olefin copolymer and satisfies the following requirements [k1] to [k3]: [k1] melt flow rate (MFR) under a loading of 2.16 kg at 190° C....
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7148302 |
Catalyst for polymerization of norbornene
This invention is based upon the discovery that a catalyst system which is comprised of (a) palladium or a palladium compound and (b) a fluorinated alcohol is effective for polymerizing...
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7081557 |
Method for the oligomerization of olefins using a cycloalkylalkyl-substituted triazacyclohexane
Disclosed is a method for the oligomerization of olefins, wherein an olefin is brought into contact with a catalyst system that is obtained from a chromium source, a cycloalkylalkyl-substituted...
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7081505 |
Activating organometallic composition for the (co) polymerization of alpha-olefins comprising fluorinated cyclopentadienyl compounds
An organometallic composition which can be used as activating component in a metallocene catalyst for the (co)polymerization of α-olefins, comprises: (A) a fluorinated di-unsaturated cyclic...
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6911410 |
Catalyst composition containing an aluminoxane for dimerizing, co-dimerizing and oligomerizing olefins
A catalyst composition for use in dimerizing, co-dimerizing or oligomerizing olefins results from dissolving a nickel compound, optionally mixed or complexed with a ligand, in a medium resulting...
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6846885 |
Process for the preparation of isoolefin copolymers
The present invention provides a novel process for the preparation of isoolefin copolymers in the presence of zirconium halides or hafnium halides or mixtures thereof and organic nitro compounds,...
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6812303 |
Olefin polymerizaion catalyst and method for polymerizing an olefin using the catalyst
A novel olefin polymerization catalyst comprising: (A) a transition metal compound comprising a transition metal having η-bonded thereto a cyclic anionic ligand; (B) a mixture of (B-1) an...
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6790805 |
Process for the in-situ preparation of single-site transition metal catalysts and polymerization process
The invention relates to a process for the in-situ preparation of alkylated single-site transition metal catalysts by contacting a precatalyst with an alkylating agent in the presence of one or...
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6683018 |
Method for producing a supported catalyst system
A process for the preparation of a supported catalyst system, an inorganic carrier material being reacted with a metal compound of the formula M 1 (R 1 ) r (R 2 ) 5 (R 3 ) t (R 4 ) u I in the...
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6576724 |
Catalytic composition and process for the catalysis of dimerization codimerization and oligomerization of olefins
A catalytic composition for the dimerization, the codimerization or the oligomerization of olefins results from the dissolution of at least one nickel complex that contains a heterocyclic carbene...
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6515085 |
Components and catalysts for the polymerization of olefins
Catalyst-forming components and catalysts for the polymerization of olefins based on said components are disclosed. The catalysts comprise the reaction product of: (a) an Al alkyl compound; (b) a...
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6436864 |
Unsaturated nitrogenous compounds as electron donors for use with ziegler-natta catalysts
Unsaturated nitrogenous compounds are used as electron donors in conjunction with catalytic polymerization of addition polymerizable monomers such as olefins, using supported Ziegler-Natta...
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6395846 |
Catalysts for olefin polymer production
The invention relates to high-activity catalysts for olefin polymerization, to efficient methods for producing them, and to efficient methods of using the catalysts for producing high-quality...
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6355592 |
Catalyst system of enhanced productivity and its use in polymerization process
A catalyst system comprising a Group 4 transition metal cation having bonded thereto (1) a single cyclopentadienyl ligand or polycyclic derivative thereof, (2) a Group 15 or 16 heteroatom ligand,...
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6346499 |
Catalyst composition for producing diaryl carbonates using carboxylic acid amide as promoter
Hydroxyaromatic compounds such as phenol are carbonylated with oxygen and carbon monoxide in the presence of a catalyst system comprising a metal from Groups 8-10 of the Periodic Table having an...
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6271165 |
Catalyst component dispersion comprising an ionic compound and solid addition polymerization catalysts containing the same
This invention relates to supported and nonsupported catalyst components comprising (a) an ionic compound comprising (a)(1) a cation and (a)(2) an anion having up to 100 nonhydrogen atoms and the...
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6225427 |
Olefin polymerization process employing metallocene catalyst provided by cocatalyst activation of a metallocene procatalyst
A polyolefin elastomer possessing a unique combination of properties, i.e., high molecular weight (M w ), high Mooney viscosity (ML 1 +4 at 125° C.), low polydispersity index (M w /M n ) and low...
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6184316 |
Catalyst and process for the syndiotactic polymerization of vinylaromatic compounds
A catalyst for the polymerization of vinylaromatic monomers, and particularly styrene, with a high yield and a high syndiotacticity index, comprises the product consisting of the following two...
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6177376 |
Process for preparing a metallocene catalyst system
The present invention relates to a process for preparing a metallocene catalyst system, which comprises reacting a metallocene starting compound in a solvent with a compound capable of transferring...
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6177375 |
High activity olefin polymerization catalysts
A method for preparing a silica supported, α-olefin polymerization catalyst includes the steps of treating a silica support with an organosilane compound, contacting the silylated silica support...
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6140432 |
Polymerization catalyst systems, their production and use
This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported metallocene...
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6133187 |
Hetergeneous metallocene catalysts and use thereof in olefin polymerization process
A catalyst comprising a cocatalyst and a catalyst component obtained by contacting a silicon-containing metallocene compound with an inorganic support to chemically bond the metallocene compound to...
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6130180 |
Catalyst for the polymerization of alpha-olefins containing substituted amino silane compounds
An aminosilane of the formula: ##STR1## where R 1 is a linear or branched C 1 -22 alkyl or C 3 -22 cycloalkyl, which may be substituted with at least one halogen atom; R 2 is a bis(linear or...
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6124230 |
Polymerization catalyst systems, their production and use
This invention is generally directed toward a supported catalyst system useful for polymerizing olefins. The method for supporting the catalyst of the invention provides for a supported bulky...
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6114276 |
Catalyst system for olefin polymerization and its use
A heterogeneous catalyst system comprising a novel titanium catalyst component, the product of a sequential reaction of titanium halide with carbodiimide compound and an organometallic aluminum...
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6074977 |
Olefin addition polymerization catalyst composition
Catalyst compositions that are highly tolerant of catalyst poisons comprising a cationic or zwitterionic Group 4 metal complex of the constrained geometry type and an organoaluminum...
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6066704 |
Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymers
A transition metal complex represented by the formula [1] ##STR1## wherein M is a transition metal atom of the group 4 of the periodic table of elements; Cp is a group having a cyclopentadiene type...
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6051524 |
Olefin polymerization and copolymerization catalyst
A solid, hydrocarbon-insoluble, catalyst component useful in polymerizing olefins containing magnesium, titanium, and halogen further contains an internal electron donor comprising ##STR1## wherein...
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6051522 |
Catalyst which can be used for the preparation of olefins during polymerization
A catalyst containing the combination which comprises: (a) an aluminoxane, a compound of the formula R x NH 4 -x, BR' 4 , R x PH 4 -x, BR' 4 , R 3 CBR' 4 or BR' 3 , or a mixture thereof...
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RE36563 |
Transition metal compound, polymerization catalyst using same and process for producing styrenic polymer using said polymerization catalyst
There are disclosed a transition metal compound of the general formula RMX a -1 L b (R is a π ligand, a fused polycyclic cyclopentadienyl group in which at least one of many-membered rings to...
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6017842 |
Olefin polymerization catalyst composition comprising group 13 compound
Catalyst compositions that are highly tolerant of catalyst poisons comprising a catalytic derivative of a Group 4 metallocene metal complex and an Group 13 metal compound according to the formula R...
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5972822 |
Biscyclopentadienyldiene complex containing addition polymerization catalysts
Catalysts for polymerizing olefins, diolefins and/or acetylenically unsaturated monomers comprising biscyclopentadienyl, Group 4 transition metal complexes formed with conjugated dienes wherein the...
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5965477 |
Process for the preparation of supported metallocene catalyst
This invention is directed to a process for the preparation of a supported metallocene catalyst, said process comprising preparing a precursor catalyst material by dissolving a magnesium halide in...
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5962361 |
Methods of making and using catalyst precursor
A method of making a solid, substantially dry olefin polymerization procatalyst precursor is disclosed whereby a solid precursor containing magnesium and titanium is formed in a slurry or solution,...
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5962360 |
Process for the preparation of a magnesium halide supported metallocene catalyst
The present invention is directed to a process for the preparation of a solid magnesium halide supported metallocene catalyst having a transition metal selected from the group consisting of IIIB,...
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5922631 |
Liquid clathrate aluminoxane compositions as co-catalysts with transition metal catalyst compounds
Olefin polymerization catalysts are described that comprise the reaction product of (a) a metallocene and/or a Ziegler-Natta catalyst compound (TICl 4 , etc.,) and (b) a liquid clathrate...
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5905126 |
Process and catalyst for producing styrenic polymer
There is disclosed a process for producing a styrenic polymer which comprises polymerizing at least one styrenic monomer by the use of a polymerization catalyst comprising in combination (A) at...
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5858904 |
Catalyst for production of vinyl-based polymer and process for production of vinyl-based aromatic polymer
A catalyst for the production of a vinyl polymer, which comprises: in combination, (A) a transition metal complex of the formula: ##STR1## wherein each of T 1 , T 2 , T 3 and T 4 , independently...
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5851945 |
Olefin polymerization catalyst compositions comprising group 5 transition metal compounds stabilized in their highest metal oxidation state
The invention addresses Group 5 metal compounds suitable as polymerization catalysts characterized by comprising one Group 15 element polyanionic ancillary ligand and three single or multidentate...
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5817590 |
Catalyst for αE --olefin polymerization containing a Lewis base
A catalyst for olefin polymerization is provided which comprises, as the components, a) a metallocene compound, b) an ionizing ionic compound, c) an organoaluminum compound, and d) a Lewis base...
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5786433 |
Process for producing styrenic polymer
There is disclosed a process for producing a styrenic polymer which comprises polymerizing at least one styrenic monomer by the use of a polymerization catalyst comprising in combination (A) at...
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5756609 |
Homogeneous metallocene-based olefin polymerization system with increased activity
An olefin homogeneous polymerization catalyst demonstrating increased activity is formed from a cyclopentadienyl metallocene component, a salt of a compatible cation and a non-coordinating anion,...
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5747614 |
Catalyst for producing sytrenic polymer and process for producing sytrenic polymer by using same
A catalyst for producing a styrenic polymer which comprises an (A) transition metal compound having one and only one π-ligand comprising only one indenyl group, said indenyl group bearing a...
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5726115 |
Bridged bis-amino group 4 metal compounds in a catalyst composition for the production of alpha-olefins
A catalyst composition comprising a bis-amide compound represented by the formula ##STR1## wherein M is zirconium, hafnium or titanium; each N is a three coordinate nitrogen atom; each e is Si, Ge...
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5721183 |
Catalyst system comprising amine or phosphine adducts of tris(organyl)borane compounds
Compositions of matter useful as addition polymerization catalysts comprising a Group 4 metal complex and an adduct of tris(organyl)borane compound with a non-tertiary amine or non-tertiary...
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