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| Number | Title | Issue Date |
| 7442667 | Preparation of supported cocatalysts The present invention relates to a process for preparing a supported cocatalyst for olefin polymerization, which comprises reacting A) a support bearing functional groups, B) triethylaluminum and C) a compound of the formula (I), (R | 10/28/2008 |
| 7417006 | Catalyst system for the polymerization of olefins A salt of formula (I) [HEoR13]+[T1T2]− (I) wherein Eo is a nitrogen or phosphorous atom; R1 is hydrocarbon radical; T1 is a Lewi... | 08/26/2008 |
| RE40234 | Process for producing crystalline poly-α-olefins with a monocyclopentadienyl transition metal catalyst system The invention is a catalytic process using a Group IV B transition metal component and an alumoxane component to polymerize α-olefins to produce high crystallinity and high molecular weight poly-α-olefins. ... | 04/08/2008 |
| 7335710 | Polymerization process A process for the polymerisation of olefins is described involving the use of a catalyst system comprising a supported transition metal compound and an activator based on an organoborane and an aluminoxane. Preferably the transition metal compound is a metallocene c... | 02/26/2008 |
| 7247686 | Solid cocatalyst component for olefin polymerization and catalyst system thereof A solid cocatalyst for olefin polymerization in which an ion-containing compound comprising a cation expressed by [R4M]+, wherein the group R are each individually selected from the group consisting of hydrogen atom and a substituted or non-substituted hy... | 07/24/2007 |
| 7241715 | Bridged bi-aromatic ligands, catalysts, processes for polymerizing and polymers therefrom New ligands and compositions with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/... | 07/10/2007 |
| 7241714 | Bridged bi-aromatic catalysts, complexes, and methods of using the same Ligands, compositions, metal-ligand complexes and arrays with substituted bridged bis-biaromatic ligands, and methods of making and using the same, are disclosed that are useful in the catalysis of transformations such as the polymerization of monomers into polymers... | 07/10/2007 |
| 7232869 | Catalyst composition for olefin polymerization A process for the preparation of a catalyst system includes the steps of combining a Lewis base, an organic compound having at least one functional group containing active hydrogen, and an organometallic component with a particulate support material to provide an in... | 06/19/2007 |
| 7196147 | Olefin polymerization process with improved operability and polymer properties Ethylene and optional comonomers are polymerized in the presence of an organozinc compound and a catalyst system to produce an ethylene polymer. The catalyst system comprises a bridged indenoindolyl Group 3-10 transition metal complex and an activator. The organozin... | 03/27/2007 |
| 7189675 | Olefin polymerization catalyst on plasma-contacted support A method for preparing an olefin polymerization catalyst is disclosed. An inorganic oxide is contacted with plasma and a transition metal compound is supported on the contacted inorganic oxide. The method is fast, convenient, and avoids many of the problems associat... | 03/13/2007 |
| 7091272 | Olefin polymerization with pyridine moiety-containing single-site catalysts An olefin polymerization process is disclosed. The polymerization is performed in the presence of a clay, an activator, and a transition metal complex that has at least one pyridine moiety-containing ligand. The presence of clay increases the catalyst activity. The ... | 08/15/2006 |
| 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 activated with the modified aluminoxane produces polyolefin with increase... | 08/01/2006 |
| 7053158 | Carborane trianion based catalyst Disclosed is a Ziegler-Natta catalyst for olefin polymerization comprising a metal cation of Group 4 or 14 of the Periodic Table (IUPAC 1976) that is coordinated to a. a carborane dianion group; b. a heteroatom ani... | 05/30/2006 |
| 7026415 | Clathrochelates as olefin polymerization catalyst components Catalyst systems and methods for olefin polymerization are disclosed. The polymerizations are performed in the presence of a clathrochelate which comprises a transition metal ion and an encapsulating macropolycyclic ligand. At least one of the capping atoms of the m... | 04/11/2006 |
| 7005489 | Zwitterionic Metallocycles A new class of zwitterionic metallocycles is disclosed. A positively charged Group 4-10 transition metal is chelated to two heteroatoms and one of the heteroatoms has a substituent bearing a negative charge. We have found that substitution in this position stabilize... | 02/28/2006 |
| 6995220 | Ethylene polymerization process A process for polymerizing ethylene is disclosed. The ethylene is polymerized with a catalyst system which comprises an activator and an indeno[2,1-b]indolyl Group 4-6 transition metal complex having open architecture. The process gives polyethylene having a broad m... | 02/07/2006 |
| 6956002 | Process for polymerization of olefins A catalyst for olefin polymerization, comprising: a solid catalyst component comprising [A] a solid component having substantially no hydroxyl group, [B] a compound of a transition metal selected f... | 10/18/2005 |
| 6953829 | Catalyst system and the use thereof A catalyst system comprising at least one metallocene, at least one cocatalyst, at least one support material and, if desired, further organometallic compounds is described. The catalyst system can advantageously be used for the polymerization of olefins and ... | 10/11/2005 |
| 6939929 | Alpha-olefin-aromatic vinyl copolymer The α-olefin-aromatic vinyl compound copolymer of the present invention is obtained by using a transition metal compound represented by the following Formula (1) and a promoter component to carry out copolymerization, and it is a novel α-olefin-aromatic vinyl comp... | 09/06/2005 |
| 6939930 | Hydrosilane additives for increased polyolefin molecular weight A process for polymerizing olefins is disclosed. The process uses a hydrosilane in a polymerization catalyzed by an open architecture, bridged indenoindolyl organometallic complex and an activator. Polyolefins from the process have increased molecular weight. ... | 09/06/2005 |
| 6933354 | Aluminoboronate activators for single-site olefin polymerization catalysts Single-site catalyst systems useful for polymerizing olefins are disclosed. The catalyst systems comprise an organometallic complex and an activator. The complex includes a Group 3-10 transition metal, M, and at least one indenoindolyl ligand that is pi-bonded to M.... | 08/23/2005 |
| 6927263 | Catalyst precursor and olefin polymerization processes Catalyst precursor compounds having both (i) a polydentate ligand which comprises a cyclic moiety as well as a heteroatom and (ii) a protected hydride/hydrocarbyl ligand bonded to a metal atom, as well as olefin polymerization catalyst systems based thereupon, polym... | 08/09/2005 |
| 6908975 | Method for preparing high 1,4-cis polybutadiene having controlled cold flow The present invention relates to a method for preparing a high 1,4-cis polybutadiene having a controlled cold flow and, more particularly, to a novel method for preparing a high 1,4-cis polybutadiene having a controlled cold flow that involves initiating polymerizat... | 06/21/2005 |
| 6908972 | Method for making polyolefins A method for making ethylene polymers and copolymers is disclosed. The method uses a catalyst system comprising a low level of an aluminum-containing activator, a bridged indenoindolyl transition metal complex, and a treated silica support. The method enables econom... | 06/21/2005 |
| 6903169 | LTMC polymerization of unsaturated monomers A process for polymerizing unsaturated monomers is disclosed. The process comprises polymerizing, in the presence of a late transition metal catalyst (LTMC), a variety of unsaturated monomers which are traditionally, some of which are exclusively, made by free radic... | 06/07/2005 |
| 6869904 | Bridged bi-aromatic ligands, catalysts, processes for polymerizing and polymers therefrom New ligands, compositions, metal-ligand complexes and arrays with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance characteristics, including higher comono... | 03/22/2005 |
| 6855784 | Synthesis of polymerization catalyst components The present invention provides a method of synthesizing fluorided metallocene catalyst components comprising contacting at least one fluoriding agent comprising fluorine with one or more alkylated metallocene catalyst components comprising one or more non-halogen le... | 02/15/2005 |
| 6844288 | Process for the preparation of ligands for metallogene catalysts A process for the preparation of ligands for metallocene catalysts used in the production of amorphous polymers of alpha-olefins having high molecular weight and narrow molecular weight distributions, in which the isotactic sequences are more abundant than the syndi... | 01/18/2005 |
| 6806329 | Highly alternating ethylene styrene interpolymers Novel ethylene styrene interpolymers having atactic ES repeating units and an alternating structure substantially higher than that predicted using Bernoullian statistics may be prepared in the presence of a transition metal phosphinimine compound and an activator. | 10/19/2004 |
| 6756505 | Metallocene complexes In metallocene complexes of a metal of transition group IV, V or VI of the Periodic Table, at least one substituted or unsubstituted cyclopentadienyl radical is bound to an element of group III of the Periodic Table which is in turn a constituent of a bridge between... | 06/29/2004 |
| 6730755 | Halosulfonic acid treated catalyst support for olefin polymerization A supported catalyst for olefin polymerization comprises a combination of a novel metal oxide support and an activator which is an aluminoxane or a boron activator. The novel metal oxide support of this invention is a conventional particulate metal oxide support mat... | 05/04/2004 |
| 6683199 | Dicationic non-metallocene group 4 metal complexes Dicationic or partially dicationic Group 4 metal compounds having utility has addition polymerization catalysts among other uses and a method of preparation.... | 01/27/2004 |
| 6653417 | Catalyst precursor and olefin polymerization processes Catalyst precursor compounds having both (i) a polydentate ligand which comprises a cyclic moiety as well as a heteroatom and (ii) a protected hydride/hydrocarbyl ligand bonded to a metal atom, as well as olefin polymerization catalyst systems based there... | 11/25/2003 |
| 6642169 | Polymerisation catalysts A catalyst system suitable for preparing substantially terminally unsaturated atactic polymers or copolymers of -olefins having a number average molecular weight in the range 300-500,000 comprises (A) a metallocene complex and (B) a cocatalyst comp... | 11/04/2003 |
| 6639030 | Process for production of olefin polymer A process for production of an olefin polymer is provided which comprises polymerization of ethylene and/or -olefin of three of more carbons at a polymerization temperature of not lower than 120° C. with a catalyst comprising a specific metallocen... | 10/28/2003 |
| 6620758 | Olefin polymerization catalyst component, its preparation and use A catalyst having high activity independent of the hydrogen concentration and low gel productivity in the polymerization of ethylene has been prepared. The preparation comprises the steps of reacting: a support comprising a magnesium halide compound having... | 09/16/2003 |
| 6608152 | Process for the polymerization of olefins; novel polyethylenes, and films and articles produced therefrom A novel process for the polymerization of olefins is provided. The process involves contacting at least one olefin with a Ziegler-Natta type catalyst in the presence of a specified compound that results in the production of polymeric products having a nar... | 08/19/2003 |
| 6605676 | Process for obtaining polyolefins with broad bimodal or multimodal molecular weight distributions The process is characterized by the use of catalyst systems consisting of a single metallocene catalyst activated with mixtures of at least 2 co-catalysts. The co-catalysts are aluminium alkyls, aluminoxanes or boron compounds. Different active centers ar... | 08/12/2003 |
| 6583239 | Process for producing a polymer of an -olefin and lubricant A process for producing a polymer of an -olefin which comprises polymerizing an -olefin having at least 4 carbon atoms in the presence of a catalyst for producing polymers of olefins which comprises (A) a specific metal compound and (B) at l... | 06/24/2003 |
| 6579961 | Ethylene styrene interpolymers with double reverse styrene incorporation Novel ethylene styrene interpolymers having triads with double reverse styrene incorporation (SSS) may be prepared in the presence of a transition metal phosphinimine compound and an activator.... | 06/17/2003 |
