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| Number | Title | Issue Date |
| 7910670 | Methods of preparation of an olefin oligomerization catalyst A method of making an olefin oligomerization catalyst, comprising contacting a chromium-containing compound, a heteroatomic ligand, and a metal alkyl, wherein the chromium-containing compound comprises less than about 5 weight percent chromium oligomers. A method of... | 03/22/2011 |
| 7468417 | Method of preparing cyclic olefin copolymer having controlled gel contents The present invention relates to a method of preparing a copolymer having controlled gel content by polymerizing cyclic olefin compound by ROMP (Ring Opening Metathesis Polymerization), and more precisely, a method of preparing cyclic olefin copolymer with high yiel... | 12/23/2008 |
| 7423101 | Catalyst composition and use thereof The present invention is directed toward Group 4, 5, 6, 7, 8, 9, 10 or 11 transition metal compounds containing neutral, mono- or di-anionic tridentate nitrogen/oxygen based ligands that are useful, with or without activators, to polymerize olefins, particularly α-... | 09/09/2008 |
| 7414099 | Hindered polyalicyclic alkyl catalysts and their use in a gas-phase polymerization reactor Embodiments of the present invention include a method of polymerizing olefins comprising contacting olefins with a catalyst composition made by the process of combining a hindered polyalicyclic alkyl catalyst precursor with a particulate inorganic oxide for a deposi... | 08/19/2008 |
| 7399895 | Aluminum phosphate-supported group 6 metal amide catalysts for oligomerization of ethylene A catalyst composition for the preparation of oligomeric and/or polymer derivatives of olefin monomers, said composition comprising a Group 6 metal amide complex, a Group 1, 2, 12, 13, or 14 metal hydrocarbyl composition or compound, and a solid support comprising a... | 07/15/2008 |
| 7384886 | Methods of preparation of an olefin oligomerization catalyst A method of making a catalyst for use in oligomerizing an olefin comprising a chromium-containing compound, a pyrrole-containing compound, a metal alkyl, a halide-containing compound, and optionally a solvent, the method comprising contacting a composition comprisin... | 06/10/2008 |
| 7358209 | Polymerisation catalysts A transition metal complex having the following Formula (A): wherein the monovalent groups R1 and R2 are —Ra, —ORb, —NRcRd, and —NHRe: the monovalent groups Ra, Rb | 04/15/2008 |
| 7356209 | Method and apparatus for optically powering and multiplexing distributed fiber optic sensors An optical power converting apparatus is provided that may be used with remote sensors. A plurality of remote sensors may be coupled to a backbone optical fiber with each sensor having an optical power converter that receives an optical signal from a head end of tha... | 04/08/2008 |
| 7338698 | Homogeneously branched ethylene polymer carpet, carpet backing and method for making same The present invention pertains to carpet and methods of making carpet. In one aspect, the carpet includes (a) a primary backing which has a face and a back surface, (b) a plurality of fibers attached to the primary backing and extending from the face of the primary ... | 03/04/2008 |
| 7317057 | Catalyst composition and use thereof The present invention is directed toward Group 4, 5, 6, 7, 8, 9, 10 or 11 transition metal compounds containing neutral, mono- or di-anionic tridentate nitrogen/oxygen based ligands that are useful, with or without activators, to polymerize olefins, particularly α-... | 01/08/2008 |
| 7279537 | Transition metal complexes and polymerization catalysts There are provided a transition metal complex of formula (1): wherein M represents an element of Group 6 of Periodic Table of Elements, A and A′ are the same or different, and represent a substituted or unsubst... | 10/09/2007 |
| 7273912 | Supported olefin polymerization catalyst Supported catalyst systems are provided comprising (a) a transition metal compound, (b) a non aluminoxane activator comprising, and (c) a support material comprising an inorganic metal oxide, inorganic metal halide or polymeric material or mixtures thereof character... | 09/25/2007 |
| 7259216 | Method for producing highly branched ethylene polymers A process for preparing highly branched ethylene polymers comprises polymerizing ethylene over a catalyst system comprising a compound of the formula Ia or Ib and an activator, where the process is carried out at... | 08/21/2007 |
| 7208441 | Polymerization catalyst systems and processes therefor and therewith A copolymer of ethylene and a higher alpha olefin, preferably 1-hexene, can be produced using an activated chromium containing catalyst system and a cocatalyst selected from the group consisting of trialkylboron, trialkylsiloxyalutninum, and a combination of trialky... | 04/24/2007 |
| 7189791 | Catalyst composition II This invention relates to a transition metal catalyst compound represented by the formula: LMX2 or (LMX2)2 wherein each M is independently a Group 7 to 11 metal, preferably a Group 7, 8, 9, or 10 metal; each L is, independently, a tr... | 03/13/2007 |
| 7144839 | Polymerization catalysts A transition metal complex having the following Formula (A): wherein the monovalent groups R1 and R2 are —Ra, —ORb, —NRcRd, and —NHRe; the monovalent groups Ra, Rb | 12/05/2006 |
| 7144964 | Solution polymerization process utilizing preassembled bimetallic Ziegler-Natta catalyst A high-temperature solution process for polymerizing ethylene is disclosed. The polymerization is performed in the presence of a preassembled bimetallic Ziegler-Natta catalyst and an aluminum compound. Molecular modeling calculations predict that the bimetallic Zieg... | 12/05/2006 |
| 7129305 | Heterocyclic-amide catalyst compositions for the polymerization of olefins A family of novel hetrocyclic-amide type catalyst precursors useful for the polymerization of olefins, such as ethylene, higher alpha-olefins, dienes, and mixtures thereof. ... | 10/31/2006 |
| 7115688 | Nanoparticles with polymer shells The invention provides a method of preparing nanoparticles having at least one polymer shell attached to them, each polymer shell having a selected property or properties. The method comprises attaching initiation monomers to the surfaces of the nanoparticles, conta... | 10/03/2006 |
| 7041763 | Photochromic polymers and methods of synthesizing same Ring-opening metathesis polymerization (ROMP) of a photochromic 1,2-bis-(3-thienyl)-cyclopentene monomer generated a series of novel polymers. All polymers exhibit reversible light-activated interconversion between their colorless-open and their colored-closed forms... | 05/09/2006 |
| 7037990 | Transition metal complexes in the controlled synthesis of polyolefins substituted with functional groups A method is provided for the polymerization of olefins substituted with a functional group using a transition metal catalyst that, by virtue of one or more stabilizing groups incorporated within the catalyst structure, “fixes” the stereoconfiguration of each ole... | 05/02/2006 |
| 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 |
| 7001964 | Selective isomerization and linear dimerization of olefins using cobalt catalysts Provided herein is an oligomerization product formed from alpha-olefins having at least three carbon atoms comprising dimers, at least about 80 weight percent of which are linear. In an embodiment, an oligomerization product formed from alpha-olefins having at least... | 02/21/2006 |
| 6992035 | Metallocenes, polymerization catalyst systems, their preparation, and use Metallocene having two cyclic dienyl groups connected by a single carbon having an aryl substituent and a terminally unsaturated hydrocarbyl substituent, olefin polymerization catalyst systems prepared therefrom, and the use of such catalyst systems are disclosed. | 01/31/2006 |
| 6951911 | Cross-linked polymer and process for producing the same, absorptive structure and absorptive article A crosslinked polymer (A) which comprises, as essential structural units, units derived from (a) one or more vinyl monomers selected from the group consisting of water-soluble vinyl monomers and/or vinyl monomers which become water-soluble upon hydrolysis and units ... | 10/04/2005 |
| 6927262 | Bridged biphospholes and metallocenes prepared therefrom The invention relates to novel bridged biphosphole ligands according to the general formula: where R2, R3, R4 are chosen from hydrogen, alkyl, aryl or silyl, R1 is chosen fro... | 08/09/2005 |
| 6897275 | Catalysts for olefin polymerization Transition metal complexes of selected monoanionic phosphine ligands, which also contain a selected Group 15 or 16 (IUPAC) element and which are coordinated to a Group 3 to 11 (IUPAC) transition metal or a lanthanide metal, are polymerization catalysts for the (co)p... | 05/24/2005 |
| 6894180 | Catalyst structure for olefin polymerization A catalyst system having the following formula is described herein. wherein M is a metal; each X is an atom or group banded to M and may be the same or different; R1 and R2 may be the same or each... | 05/17/2005 |
| 6891007 | Method for polymerizing polar substituted cycloalkenes This invention relates to a process for polymerizing polar substituted norbornenes and/or cycloalkenes, optionally, in the presence of another unsaturated compound. The method is characterized in that the polymerization is carried out in the presence of one or more ... | 05/10/2005 |
| 6887958 | Method for polymerizing olefins Ethylene or propylene are copolymerized with one another or with other olefinically unsaturated compounds in the presence of a catalyst system comprising the following components: A) a complex of a transition metal with one or two substituted or unsubst... | 05/03/2005 |
| 6875835 | Polymerization catalyst systems and processes therefor and therewith A copolymer of ethylene and a higher alpha olefin, preferably 1-hexene, can be produced using an activated chromium containing catalyst system and a cocatalyst selected from the group consisting of trialkylboron, trialkylsiloxyalutninum, and a combination of trialky... | 04/05/2005 |
| 6864209 | Organometallic complexes comprising phosphonite ligands, and their use in catalyzing olefin oligomerization A catalytic composition for oligomerizing olefins, in particular ethylene, comprises mixing at least one nickel complex, prepared by reacting a nickel salt with a phosphonite ligapd, with at least one hydrocarbylaluminum compound in a molar proportion with respect t... | 03/08/2005 |
| 6809057 | Chromium compounds and olefin polymerization processes utilizing them An olefin polymerization catalyst system, comprising a catalyst represented by the general formula CrR4, wherein each R is independently a hydrocarbyl or substituted hydrocarbyl, with the proviso that R may not be a cyclopentadienyl group, an activator re... | 10/26/2004 |
| 6794488 | Method for purifying a thermoplastic norbornene resin, a substrate using such a resin, and a magnetic recording medium using such a substrate A thermoplastic norbornene resin is purified by using a cleaning liquid to eliminate organic impurities, ionic impurities, metallic impurities, and particles of the resin. The cleaning liquid is selected from 2-propanol and a mixed solvent of 2-propanol and water. A... | 09/21/2004 |
| 6784261 | Imidochromium compounds contained in catalyst systems for olefin polymerization The present invention relates to catalyst system containing at least one imidochrome compound and at least one activation compound. This invention also relates to imidochrome compounds, to a method for olefin polymerization and to methods for producing said imidochr... | 08/31/2004 |
| 6750302 | Organometal catalyst compositions A polymerization catalyst is disclosed, wherein the catalyst comprises: (a) a metallocene of Ti, Zr or Hf, (b) an organoaluminum compound, and (c) a treated solid oxide support which comprises fluorine and chromium. ... | 06/15/2004 |
| 6723807 | Catalyst component and catalyst for addition polymerization, and process for producing addition polymer A catalyst obtained by contacting a transition metal compound (A) of the general formula [1]: [LpXoCpjM(N2)nM′XmLl]X′k [1], wherein M an... | 04/20/2004 |
| 6649558 | Bis-phosphinimine catalyst Organometallic complexes having two phosphinimine ligands and at least one activatable ligand are catalyst components for olefin polymerization. Preferred polymerization systems are prepared by combining the organometallic complexes with an ionic activato... | 11/18/2003 |
| 6646069 | Ethylene polymers and method for producing the same The invention relates to a method for producing an ethylene polymer, comprising performing polymerization of ethylene in co-presence of hydrogen using a trialkylaluminum compound-carried chromium catalyst, wherein the chromium catalyst is obtained by calc... | 11/11/2003 |
| 6613851 | Catalyst for the polymerization of olefins The invention relates to the use of cyclic carbene-η-ligand complexes for catalysis of olefin polymerization.... | 09/02/2003 |
