Patents Examined by J. Pasterczyk
  • Patent number: 6841634
    Abstract: A modified supported olefin polymerization catalyst modified by prepolymerization with an olefin or an olefin mixture different from the olefin or olefin mixture of the subsequent olefin polymerization. The polymerization catalyst is a metallocene, and the melting or softening point of the polyolefin made using the catalyst is at least 20° C. lower than that of the prepolymerized polyolefin.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: January 11, 2005
    Assignee: Borealis Technology Oy
    Inventors: Eberhard Ernst, Jens Reussner, Per Roterud, Kjell-Arne Solli
  • Patent number: 6841693
    Abstract: A transition metal compound of Groups to 10 of the Periodic Table, represented by the following formula (1): wherein M represents a transition metal of Groups 8 to 10 of the Periodic Table; L, electrically neutral, represents a hetero atom-containing hydrocarbon group represented by the following formula (2) wherein R1 to R5 each independently represent a hydrogen atom, a halogen atom, a hydrocarbon group having form 1 to 20 carbon atoms, a halogenohydrocarbon group having from 1 to 20 carbon atoms, or a hetero atom-containing group, and optionally these groups are bonded to each other to form a ring; R6 represents a hydrogen atom, a hydrocarbon group having form 1 to 40 carbon atoms, a halogenohydrocarbon group having from 1 to 40 carton atoms, or a hetero atom-containing group; L? electrically neutral, represents a hetero atom-containing hydrocarbon group represented by the following formula (3) wherein R7 to R11 each independently represent a hydrogen atom, a halogen atom, a hydrocarbon group
    Type: Grant
    Filed: November 10, 2000
    Date of Patent: January 11, 2005
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Masami Watanabe, Haruhito Sato, Masahiko Kuramoto, Shinji Tanaka, Takao Tamura
  • Patent number: 6841676
    Abstract: Novel compounds are provided which are useful as catalysts, particularly in the polymerization of addition polymerizable monomers such as olefinic or vinyl monomers. The compounds are complexes of a mid-transition metal coordinated to at least two ligands, at least one of which is an unsaturated nitrogenous ligand. Depending on ligand substitution, stereospecific catalysts can be provided, including isospecific catalysts and syndiospecific catalysts. Catalyst systems containing the novel compounds in combination with a catalyst activator are provided as well, as are methods of using the novel compounds in the preparation of polyolefins.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: January 11, 2005
    Assignee: SRI International
    Inventors: Christopher D. Tagge, Robert B. Wilson, Jr.
  • Patent number: 6828268
    Abstract: A catalyst system composition comprising a chromium compound supported on a silica-titania support, wherein said catalyst system has been reduced with carbon monoxide, and a cocatalyst selected from the group consisting of i) alkyl lithium compounds, ii) dialkyl aluminum alkoxides in combination with at least one metal alkyl selected from the group consisting of alkyl zinc compounds, alkyl aluminum compounds, alkyl boron compounds, and mixtures thereof and iii) mixtures thereof can be used to polymerize olefins to produce a low density polymer with a decreased melt index and/or high load melt index. This catalyst system also can be used with a Ziegler-Natta catalyst system to polymerize olefins. Polymerization processes using these catalyst system compositions are also provided.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: December 7, 2004
    Assignee: Phillips Petroleum Company
    Inventors: Max P. McDaniel, Joseph S. Shveima, Elizabeth A. Benham, Rolf L. Geerts, James L. Smith
  • Patent number: 6828270
    Abstract: The supported catalyst according to the present invention comprises a support of organic or inorganic powder with a high-surface area, a polymer coated onto the support and a metallocene catalyst. The polymer (1) contains polar groups; (2) interacts with the surface of the support; and (3) is insoluble in the styrenic monomer or polymerization solvent during polymerization after the catalyst is loaded. The polymer is located between the support and the metallocene catalyst such that the polymer insulates the metallocene layer from the support layer to prevent poisoning of the metallocene catalyst layer by the support layer. The styrenic polymer powder such produced by the present invention has good flow-ability and good morphology demonstrating a great deal of industrial applicability.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: December 7, 2004
    Assignee: Samsung Atofina Co. Ltd.
    Inventors: Xuequan Zhang, Sung-Cheol Yoon, Jae-Gon Lim, Young-Sub Lee
  • Patent number: 6825372
    Abstract: This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization. The metallocene compositions may be represented by the formula: wherein R9 and R11 are identical or different and are a Group 14 radical having from 1 to 20 carbon atoms or are each primary, secondary or tertiary butyl groups, aryl groups, isopropyl groups, fluoroalkyl groups, trialkyl silyl groups, or other groups of similar size.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: November 30, 2004
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Terry John Burkhardt, William T. Haygood, Jr., Robert Tan Li, James Charles Vizzini, Matthew Cornyn Kuchta, Udo M. Stehling, James R. Hart
  • Patent number: 6825369
    Abstract: A monocyclopentadienyl or substituted monocyclopentadienyl metal complex containing compound useful as a polymerization catalyst corresponding to the formula: CpMXn+A− wherein: Cp is an &eegr;5-substituted cyclopentadienyl group optionally covalently bonded to M through a substituent, said Cp being substituted in at least one occurrence with an alkoxy or aryloxy group; M is a metal of Group 3-10 or the Lanthanide Series of the Periodic Table bound in an &eegr;hu 5 bonding mode to the cyclopentadienyl or substituted cyclopentadienyl group; X each occurrence independently is selected from the group consisting of hydride, halo, alkyl, aryl, silyl, germyl, aryloxy, alkoxy, amide, siloxy, neutral Lewis base ligands and combinations thereof having up to 20 non-hydrogen atoms, and optionally one X together with Cp forms a metallocycle with M; R is alkyl or aryl of up to 10 carbons; n is one or two depending on the valence of M; and A is a noncoordinating, compatible anion of a Bronsted acid salt.
    Type: Grant
    Filed: March 10, 1994
    Date of Patent: November 30, 2004
    Assignee: The Dow Chemical Company
    Inventors: James C. Stevens, David R. Neithamer
  • Patent number: 6825148
    Abstract: A process for the oligomerization of ethylene to a mixture of olefinic products having high linearity is provided, by using a catalyst comprising a reaction product of a simple divalent nickel salt; a boron hydride reducing agent; a water soluble base; a ligand selected from the group consisting of an o-dihydrocarbylphosphinobenzoic acid and alkali metal salts thereof; and a phosphite.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: November 30, 2004
    Assignee: Shell Oil Company
    Inventors: David Stephen Brown, Richard Edward Robertson
  • Patent number: 6812184
    Abstract: A late transition metal catalyst system for polymerization of olefin monomers is a Group 9, 10 or 11 metal complex stabilized by a bidentate ligand immobilized on a solid support where the late transition metal loading is less than 100 micromoles transition metal compound per gram of solid support. The bidentate ligand has the formula: wherein A is a bridging group containing a Group 13-15 element; each E is independently a Group 15 or 16 element bonded to M; each R is independently a C1-C30 containing radical or diradical group which is a hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, hydrocarbyl-substituted organometalloid, halocarbyl-substituted organometalloid, m and n are independently 1 or 2 depending on the valency of E; and p is the charge on the bidentate ligand.
    Type: Grant
    Filed: June 17, 1997
    Date of Patent: November 2, 2004
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: George Alan Vaughan, Jo Ann Marie Canich, Phillip T. Matsunaga, David Edward Gindelberger, Kevin Richard Squire
  • Patent number: 6809058
    Abstract: The instant invention provides a late transition metal complex which can be used with an activating cocatalyst to produce polymers and copolymers. The invention also provides methods for polymerizing olefins, as well as copolymers having polar monomers incorporated therein.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: October 26, 2004
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Lisa Saunders Boffa, Abhimanyu Onkar Patil, Donald Norman Schulz, Robert Timothy Stibrany, Joseph Anthony Sissano, Stephen Zushma
  • Patent number: 6809059
    Abstract: A catalyst and method for performing a Michael addition reaction between a &bgr;-dicarbonyl compound with a cyclic or acyclic enone, where the catalyst comprises a substituted or unsubstituted lanthanum-linked BINOL complex, e.g. a (R,R)-La-linked-BINOL complex (I), are described. The catalyst is stable in air, is readily separated from the reaction mixtures and may be reused if desired.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: October 26, 2004
    Assignee: Johnson Matthey PLC
    Inventor: Masakatsu Shibasaki
  • Patent number: 6800774
    Abstract: The present invention provides a polynuclear &agr;-diimine Ni(II) complex used as the precursor of the catalyst in polymerizing polyolefine, represented by the following formula: wherein M is Ni; X is Cl or Br; m and n is independently an integer from 0 to 100, respectively; R1 and R2 is the same or different, and is selected from the group consisting of H, methyl, ethyl, isopropyl and tert-butyl; Y is CR3R4, wherein R3 and R4 is the same or different, and is selected from the group consisting of H, methyl, ethyl, propyl, butyl and phenyl, or R3 and R4 forming a cyclic alkyl group; R5 and R6 is the same or different, and is selected from the group consisting of methyl, ethyl, propyl and heterocyclic group; Q is a cyclic divalent residual group of the following formula or a mixture thereof: The compound of this invention can be used to catalyze the polymerization of ethylene and to prepare high molecular weight branched polyethylene.
    Type: Grant
    Filed: May 10, 2001
    Date of Patent: October 5, 2004
    Assignee: Changchun Institute of Applied Chemistry Chinese Academy of Science
    Inventors: Yuesheng Li, Jingyu Liu, Ke Dai, Yi Zheng
  • Patent number: 6790805
    Abstract: 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 more olefin monomers in the polymerization system. The precatalyst, which is produced prior to introducing into the polymerization system, is obtained by contacting a transition metal complex and boron-containing ionizing agent, optionally, with a support.
    Type: Grant
    Filed: August 2, 2001
    Date of Patent: September 14, 2004
    Assignee: Equistar Chemicals, LP
    Inventor: Shaotian Wang
  • Patent number: 6767856
    Abstract: This invention is directed to cationic polymerization of olefins using catalysts comprising a Group 6 or 10 neutral transition metal cation composition having a cyclopropenyl ring, a pi-bonded cyclopentadienyl ligand or cyclopentadienyl group-containing ligand and an amido or imido ligand. The precursor of the neutral transition metal composition is activated to a catalytic state by exposure to an activator composition that may be any of the heretofore known activator compositions such as an alumoxane or a compatible non-coordinating anion (NCA).
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: July 27, 2004
    Assignee: Univation Technologies, LLC
    Inventor: Donna Jean Crowther
  • Patent number: 6759362
    Abstract: A process for making a solid composition comprising alkoxide groups, chloride groups, one or more metals, M, in the +2 oxidation state selected from Mg, Ca, Mn, Cu, Co or Zn, and one or more metals, T, in the +3, +4 or +5 oxidation state selected from Ti, Zr, V, Sm, Fe, Ni, Rh, Co, Cr, Mo, W or Hf, the molar ratio M/T of the composition being from 2.5 to 3.75, said process comprising contacting one or more alkoxide containing compounds of metal M, one or more alkoxide compounds of metal T, and a halide compound, the molar ratio M/T of the contacting compounds being from 2.5 to 3.5, and recovering the resulting solid.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: July 6, 2004
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventor: Robert Charles Job
  • Patent number: 6759361
    Abstract: 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. The activator is a reaction product of an alkylaluminum compound and an organoboronic acid. Catalyst systems of the invention significantly outperform known catalyst systems that employ a metallocene complex and similar aluminoboronate activators.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: July 6, 2004
    Assignee: Equistar Chemicals, LP
    Inventors: Michael W. Lynch, Craig C. Meverden, Sandor Nagy, Karen L. Neal-Hawkins
  • Patent number: 6753288
    Abstract: Organolead compounds such as tetraethyllead are useful in catalyst compositions for the oxidative carbonylation of hydroxyaromatic compounds to diaryl carbonates. They are employed in combination with a Group 8, 9, or 10 metal such as palladium, or a compound thereof, and a bromide or chloride such as tetraethylammonium bromide.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: June 22, 2004
    Assignee: General Electric Company
    Inventors: Kirill Vladimirovich Shalyaev, Bruce Fletcher Johnson
  • Patent number: 6750170
    Abstract: Single site catalysts which contain a transition metal, a cyclopentadienyl may be activated with alumoxanes in the gas, solution or group-containing ligand, and a phosphinimine ligand slurry phase polymerization of olefin. Alumoxanes contain residual aluminum alkyls which may poison the catalysts. The residual aluminum alkyls may be bound and/or removed from the alumoxanes by treatment with carbohydrates such as cellulose, starch or sugar.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: June 15, 2004
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Peter Phung Minh Hoang, Dusan Jeremic, Jason Roy Kearns, Iain McLaren Coulter, Robert D. Donaldson
  • Patent number: 6734134
    Abstract: A new synthesis of a Ziegler-Natta catalyst uses a multi-step preparation that includes treating a magnesium dialkoxide compound with two halogenating/titanating agents, the second stronger than the first, an organoaluminum preactivating agent, and a heat treatment. The catalyst may be used in the polymerization of olefins, particularly ethylene, to control the molecular weight distribution of the resulting polyolefins.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: May 11, 2004
    Assignee: Fina Technology, Inc.
    Inventors: Steven D. Gray, Tim J. Coffy
  • Patent number: 6734267
    Abstract: 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 catalyst formed by vacuum or pressurized impregnation.
    Type: Grant
    Filed: May 6, 2003
    Date of Patent: May 11, 2004
    Assignee: Univation Technologies, LLC
    Inventor: Main Chang