Patents Represented by Attorney Jaimes Sher

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  • Nitrogen-containing group 13 anionic complexes for olefin polymerization
    Patent number: 6211105
    Abstract: This description addresses a process for the preparation of polyolefins from one or more olefinic monomers comprising combining said olefins under olefin polymerization conditions with an organometallic catalyst compound that is activated for olefin polymerization by reaction with a Group 13 element cocatalyst complex comprising at least one halogenated, nitrogen-containing aromatic group ligand. High number-average molecular weight polymers and copolymers at high rates of productivity were observed from the use of metallocene catalysts complexes when activated with [(C6H5)3C][(C6F5)3B(C5F4N)].
    Type: Grant
    Filed: July 20, 2000
    Date of Patent: April 3, 2001
    Assignee: Univation Technologies, LLD
    Inventor: Matthew W. Holtcamp
  • Mixed catalysts and their use in a polymerization process
    Patent number: 6207606
    Abstract: The present invention relates to a mixed catalyst system of at least one bridged, bulky ligand metallocene-type compound, and at least one bridged, asymmetrically substituted, bulky ligand metallocene-type compound, a method of making the mixed catalyst system and to its use in a polymerization process to produce olefin polymers having an unexpected improvement in processability.
    Type: Grant
    Filed: May 15, 1998
    Date of Patent: March 27, 2001
    Assignee: Univation Technologies, LLC
    Inventors: Ching-Tai Lue, Donna J. Crowther
  • Catalyst composition for the polymerization of olefins
    Patent number: 6187712
    Abstract: A catalyst composition for the polymerization of olefins is provided. The catalyst composition comprises a mono- or biscycloalkadienyl catalyst precursor comprising at least one protected hydride ligand or protected hydrocarbyl ligand bound to a metal atom plus a cocatalyst. The protected hydride ligand is preferably a borohydride ligand.
    Type: Grant
    Filed: September 16, 1998
    Date of Patent: February 13, 2001
    Assignee: Univation Technologies, LLC
    Inventor: Thomas Henry Peterson
  • Catalyst composition and methods for its preparation and use in a polymerization process
    Patent number: 6180735
    Abstract: The present invention relates to a catalyst composition and a method for making the catalyst composition of a polymerization catalyst and a carbonyl compound. The invention is also directed to the use of the catalyst composition in the polymerization of olefin(s). In particular, the polymerization catalyst system is supported on a carrier. More particularly, the polymerization catalyst comprises a bulky ligand metallocene-type catalyst system.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: January 30, 2001
    Assignee: Univation Technologies
    Inventor: Timothy T. Wenzel
  • Ethylene polymers having superior clarity enhanced toughness, low extractables, and processing ease
    Patent number: 6159617
    Abstract: Ethylene polymers having a) a Polydispersity Index of about 2 to about 4; b) a melt index, MI, and Relaxation Spectrum Index, RSI, such that (RSI)(MI.sup.0.6) is about 2.5 to about 6.5; c) a Crystallizable Chain Length Distribution Index, L.sub.w /L.sub.n, of about 1.0 to about 9; and d) a density, .rho., and a percent haze when fabricated into films such that the percent haze is less than 370.rho.-330, are provided. These ethylene polymers advantageously combine superior clarity and toughness with low extractables and enhanced processing ease.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: December 12, 2000
    Assignee: Univation Technologies, LLC
    Inventors: George Norris Foster, Tong Chen, Robert Harold Vogel, Scott Hanley Wasserman, Day-Chyuan Lee, Walter Thomas Reichle, Frederick John Karol, Gregory Todd Whiteker
  • Aluminum based lewis acid cocatalysts for olefin polymerization
    Patent number: 6147174
    Abstract: This invention is directed to a process for the preparation of polyolefins from one or more olefinic monomers comprising combining said olefins under olefin polymerization conditions with an organometallic catalyst compound that is activated for olefin polymerization by reaction with at least one Lewis acid aluminum compound of the formula R.sub.n Al(ArHal).sub.3-n, where "ArHal" is a halogenated aryl group, n=1 or 2, and R is a monoanionic group other than a halogenated aryl group. The invention also relates to a polymer produced using the process and to the polymer itself.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: November 14, 2000
    Assignee: Univation Technologies, LLC
    Inventors: Matthew W. Holtcamp, Ching-Tai Lue
  • Nitrogen-containing group 13 anionic complexes for olefin polymerization
    Patent number: 6147173
    Abstract: This description addresses a process for the preparation of polyolefins from one or more olefinic monomers comprising combining said olefins under olefin polymerization conditions with an organometallic catalyst compound that is activated for olefin polymerization by reaction with a Group 13 element cocatalyst complex comprising at least one halogenated, nitrogen-containing aromatic group ligand. High number-average molecular weight polymers and copolymers at high rates of productivity were observed from the use of metallocene catalysts complexes when activated with [(C.sub.6 H.sub.5).sub.3 C][(C.sub.6 F.sub.5).sub.3 B(C.sub.5 F.sub.4 N)].
    Type: Grant
    Filed: November 13, 1998
    Date of Patent: November 14, 2000
    Assignee: Univation Technologies, LLC
    Inventor: Matthew W. Holtcamp
  • Catalyst for the production of olefin polymers
    Patent number: 6093824
    Abstract: A catalyst composition for the polymerization of olefins is provided, comprising a bis(hydroxy aromatic nitrogen ligand) transition metal catalyst precursor and an activating cocatalyst.
    Type: Grant
    Filed: February 25, 1998
    Date of Patent: July 25, 2000
    Assignee: Univation Technologies, LLC
    Inventors: Walter Thomas Reichle, Frederick John Karol
  • Carbocationic catalysts and process for using said catalysts
    Patent number: 6074978
    Abstract: A carbocationic catalyst composition comprising an initiator of water, a tertiary alkyl or aralkyl halide, ester, ether, carboxylic acid, acid halide or a polymeric halide, a co-initiator of organometal alkoxide halides, organometal phenoxide halides and/or organometal carboxyl halides is used to produce polymers particularly polyisobutylene and isobutylene/para-methyl-styrene copolymers.
    Type: Grant
    Filed: March 12, 1996
    Date of Patent: June 13, 2000
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Timothy Daniel Shaffer
  • Process for the production of olefin polymers
    Patent number: 6066703
    Abstract: A process for the polymerization of an olefin which employs as the catalyst composition the reaction product of a) a monocycloalkadienyl catalyst precursor; b) an activity enhancing cycloalkadiene; and c) an activating cocatalyst is disclosed.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: May 23, 2000
    Assignee: Univation Technologies LLC.
    Inventors: Walter Thomas Reichle, Xinmin Yang, Frederick John Karol
  • Germanium bridged metallocenes producing polymers with increased melt strength
    Patent number: 6034192
    Abstract: This invention relates to a process for polymerizing ethylene comprising contacting ethylene and optional comonomers with a catalyst system comprising an activator and a transition metal compound represented by the formula: ##STR1## Wherein R.sub.1 and R2 are independently hydrogen or a group having up to 100 carbon atoms, Cp.sub.1 is a bulky ligand; Cp.sub.2 is a bulky ligand or a heteroatom optionally bound to a C.sub.1 to C.sub.50 hydrocarbyl group, n is the valence state of the transition metal, Tm is a Group 3 to 10 metal, and each X is independently an anionic leaving group.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: March 7, 2000
    Assignee: Univation Technologies, LLC
    Inventors: Donna J. Crowther, Natalie A. Merrill, Ching-Tai Lue
  • Pentafulvene synthesis
    Patent number: 6025512
    Abstract: This invention relates to a method to produce pentfulvenes comprising combining a partially substituted cyclopentadiene with a carbonyl containing compound and lithium or an alkyl lithium, wherein the partially substituted cyclopentadiene is represented by the formula: ##STR1## wherein the R.sup.1 to R.sup.5 groups are independently hydrogen or a C.sub.1 to C.sub.100 group, provided at least one R group is hydrogen but not more than three R groups are hydrogen.
    Type: Grant
    Filed: January 6, 1999
    Date of Patent: February 15, 2000
    Assignee: Univation Technologies, LLC
    Inventors: Donna Jean Crowther, Jorge L. Zamora
  • Polymerization catalyst systems, their production and use
    Patent number: 5801113
    Abstract: The invention is generally directed toward a catalyst system useful for polymerizing olefins. The catalyst system of this invention comprises a supported ion-exchange catalyst system.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 1, 1998
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Moses Olukayode Jejelowo, Gregory George Hlatky
  • Olefin polymerization process with little or no scavenger present
    Patent number: 5763543
    Abstract: The present invention relates to a continuous process for the polymerization of olefin(s) utilizing a metallocene catalyst or catalyst system in a continuous slurry or gas phase polymerization process for polymerizing monomer(s). The invention is more particularly drawn to a gas phase polymerization process for polymerizing one or more olefin(s), alone or in combination, in the presence of a metallocene catalyst system in a fluidized bed reactor, preferably operating in a condensed mode.
    Type: Grant
    Filed: September 14, 1994
    Date of Patent: June 9, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Michael Elroy Muhle, Gary Thomas Renola, Agapios Kyriacos Agapiou, Dwayne Lee Litteer, John Robert Griffin
  • Process for transitioning between incompatible polymerization catalysts
    Patent number: 5753786
    Abstract: This invention relates to a process for transitioning between incompatible polymerization catalyst systems. Particularly, the invention relates to a process for transitioning from an olefin polymerization reaction utilizing a traditional Ziegler-Natta catalyst system to a metallocene-olefin polymerization reaction.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: May 19, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Agapios Kyriacos Agapiou, Michael Elroy Muhle, Gary Thomas Renola
  • Process for transitioning between incompatible polymerization catalysts
    Patent number: 5747612
    Abstract: This invention relates to a process for transitioning between incompatible polymerization catalyst systems. Particularly, the invention relates to a process for transitioning from an olefin polymerization reaction utilizing a traditional Ziegler-Natta catalyst system to a metallocene-olefin polymerization reaction.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: May 5, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Agapios Kyriacos Agapiou, Michael Elroy Muhle, Gary Thomas Renola
  • Polymerization process
    Patent number: 5712352
    Abstract: The present invention relates to a continuous process for the polymerization of olefin(s) utilizing a metallocene catalyst or catalyst system in a continuous slurry or gas phase polymerization process. The invention is more particularly drawn to a gas phase polymerization process for polymerizing one or more olefin(s) in the presence of a metallocene catalyst system in a fluidized bed reactor in the absence of or with a low mount of a scavenger.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: January 27, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Patrick Brant, John R. Griffin, Michael Elroy Muhle, Dwayne Lee Litteer, Agapios Kyriacos Agapiou, Gary Thomas Renola
  • Gas phase polymerization process
    Patent number: 5712353
    Abstract: The present invention relates to a gas phase process for the polymerization of olefins utilizing a metallocene catalyst system to produce polymers having a low density and a relatively high molecular weight. More particularly, the gas phase process of the invention is directed forward the production of very low density polymers, for example rubbers, elastomers and plastomers.
    Type: Grant
    Filed: October 31, 1994
    Date of Patent: January 27, 1998
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Eugene Edmond Poirot, Vispi Ruston Sagar, Scott Kevin Jackson
  • Process for transitioning between incompatible polymerization catalysts
    Patent number: 5672666
    Abstract: This invention relates to a process for transitioning between polymerization catalyst systems which are incompatible with each other. Particularly, the invention relates to a process for transitioning from an olefin polymerization reaction utilizing a traditional Ziegler-Natta catalyst system to a metallocene-olefin polymerization reaction.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: September 30, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Michael Elroy Muhle, Agapios Kyriacos Agapiou, Gary Thomas Renola
  • Process for transitioning between incompatible polymerization catalysts
    Patent number: 5672665
    Abstract: This invention relates to a process for transitioning between incompatible polymerization catalyst systems. Particularly, the invention relates to a process for transitioning from an olefin polymerization reaction utilizing a traditional Ziegler-Natta catalyst system to a metallocene-olefin polymerization reaction.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: September 30, 1997
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Agapios Kyriacos Agapiou, Michael Elroy Muhle, Gary Thomas Renola