Patents by Inventor Bruce Welch

Bruce Welch has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5886202
    Abstract: Bridged fluorenyl/indenyl metallocenes having substituents at the 3 position of the indenyl and the use thereof in the polymerization of olefins are disclosed. Also a new method for preparing bridged fluorenyl/indenyl ligands wherein the indenyl has a substituent in the 3 position and the preparation of metallocenes with such ligands.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: March 23, 1999
    Inventors: Michael Jung, Helmut G. Alt, M. Bruce Welch
  • Patent number: 5856547
    Abstract: An (organo) (omega-alkenyl) (cyclopentacarbyl) silane compound is provided. A process that produces an (organo) (omega-alkenyl) (cyclopentacarbyl) silane compound is provided. A process to polymerize olefins, especially ethylene, with a metallocene compound that comprises an (organo) (omega-alkenyl) (cyclopentacarbyl) silane compound is provided.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: January 5, 1999
    Assignee: Phillips Petroleum Company
    Inventors: Michael Jung, Helmut G. Alt, M. Bruce Welch
  • Patent number: 5854363
    Abstract: An (omega-alkenyl) (cyclopentacarbyl) metallocene compound is provided. Polymerization processes therewith are also provided.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: December 29, 1998
    Assignee: Phillips Petroleum Company
    Inventors: Michael Jung, Helmut G. Alt, M. Bruce Welch
  • Patent number: 5830958
    Abstract: A process for preparing polynuclear metallocenes by reacting a metallocene in which one of the cyclopentadienyl-containing radicals has a substituent having olefinic or acetylenic unsaturation with a second metallocene having a metal which comes from groups IVb to VIb of the periodic table and a metal-hydride bond. The use of the resulting metallocenes in the polymerization of olefins is disclosed, including techniques for using such metallocenes to produce solid prepolymerized metallocene-containing catalyst systems suitable for use in the polymerization of olefins.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: November 3, 1998
    Assignee: Phillips Petroleum Company
    Inventors: Bernd Peifer, Helmut G. Alt, M. Bruce Welch
  • Patent number: 5780659
    Abstract: Unbridged metallocenes of titanium, zirconium and hafnium having an unsubstituted cyclopentadienyl radical and an indenyl radical having in at least one of the 1, 2, or 3 positions a substitutent selected from hydrocarbon radicals and trialkylsilyl radicals, and their use in the polymerization of olefins.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: July 14, 1998
    Assignee: Phillips Petroleum Company
    Inventors: Claudia Schmid, Helmut G. Alt, M. Bruce Welch
  • Patent number: 5770755
    Abstract: Processes to prepare polymeric metallocene are provided. Said processes comprise reacting a polymeric ligand, an alkali metal compound, and a transition metal-containing compound to produce said polymeric metallocene. therefor.
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: June 23, 1998
    Assignee: Phillips Petroleum Company
    Inventors: Peter Schertl, Helmut G. Alt, Bernd Peifer, Syriac J. Palackal, M. Bruce Welch
  • Patent number: 5770663
    Abstract: Double bound metallocenes, i.e. metallocenes having a cyclopentadienyl-containing radical that is bound to a transition metal both by a pi bond and by a sigma carbon bond of a substituent of that same cyclopentadienyl-containing radical can be prepared by reducing metallocenes having a cyclopentadienyl-containing radical having at least one an unsaturated substituent. Also a process for producing polymers comprising contacting at least one olefinic monomer under suitable polymerization conditions with such double bound metallocenes.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: June 23, 1998
    Assignee: Phillips Petroleum Company
    Inventors: Bernd Peifer, Helmut G. Alt, M. Bruce Welch
  • Patent number: 5744666
    Abstract: A process for preparing an alkynyl fulvene group containing compound and said compound is provided. Said process comprises reacting an alkynyl ketone compound with a cyclopentadienyl-type compound.
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: April 28, 1998
    Assignee: Phillips Petroleum Company
    Inventors: M. Bruce Welch, Bernd Peifer, Helmut G. Alt
  • Patent number: 5728908
    Abstract: A process for preparing a bridged ligand, where said bridged ligand has an alkynyl group, and said bridged ligand is provided. Said process comprises reacting an alkynyl fulvene containing compound with an alkali metal salt of a cyclopentadienyl-type compound.
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: March 17, 1998
    Assignee: Phillips Petroleum Company
    Inventors: M. Bruce Welch, Bernd Peifer, Helmut G. Alt
  • Patent number: 5726264
    Abstract: A process to produce an ethylene-bridged-metallocene-transition-metal compound that has an omega-alkenyl substitution on said ethylene bridge is provided. Said process comprises: contacting a diolefin compound with a peracid compound to form an omega-alkenyl oxirane compound; contacting said omega-alkenyl oxirane compound with an organometal compound to form an organo-omega-alkenyl-alcohol compound; contacting said organo-omega-alkenyl-alcohol compound with an organosulfur compound to form an organo-omega-alkenyl-organosulfur ester compound; contacting said organo-omega-alkenyl-organosulfur ester compound with an organometal to form an orgaomega-alkenyl-organo compound; contacting said organo-omega-alkenyl-organo compound with a transition metal compound to form a organo-omega-alkenyl-organo-transition compound. Additionally, processes to polymerize olefins using these compounds is provided.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: March 10, 1998
    Assignee: Phillips Petroleum Company
    Inventors: Michael Jung, Helmut G. Alt, M. Bruce Welch
  • Patent number: 5712404
    Abstract: In accordance with the present invention there is provided a process for preparing a cyclopentadienyl-type ligand comprising reacting an alkali metal compound and a fulvene-type compound to form a dianion, and then reacting the dianion with water. In accordance with another embodiment of the present invention a process for preparing a metallocene compound is provided comprising reacting an alkali metal compound, a fulvene-type compound, and a transition metal-containing compound. In another embodiment, the metallocene compound and a cocatalyst are combined to form a catalyst system. Other aspects of the invention include the cyclopentadienyl-type ligands, metallocene compounds, and catalyst systems thus produced and polymerization processes employing the catalyst systems.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: January 27, 1998
    Assignee: Phillips Petroleum Company
    Inventors: Bernd Peifer, Helmut G. Alt, M. Bruce Welch
  • Patent number: 5710224
    Abstract: A process for preparing a polymer of ethylene having a flow activation energy higher than that of a substantially linear ethylene polymer of the same molecular weight involving using bridged sandwich-bonded fluorenyl-containing metallocenes and the polymers resulting therefrom.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: January 20, 1998
    Assignee: Phillips Petroleum Company
    Inventors: Helmut G. Alt, Syriac J. Palackal, M. Bruce Welch, David C. Rohlfing, Jay Janzen
  • Patent number: 5705578
    Abstract: Methods are disclosed for preparing a highly active solid metallocene-containing catalyst system and its use in the polymerization of olefins. The solid catalyst system is prepared by combining an aluminoxane with a metallocene having a substituent which has internal alkynyl unsaturation in a suitable liquid to form a liquid catalyst system, conducting prepolymerization of an olefin in the liquid catalyst system, and separating the resulting solid metallocene-containing catalyst system from the last reaction product mixture. Also polymerization of olefins using the inventive solid catalyst system is disclosed.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: January 6, 1998
    Assignee: Phillips Petroleum Company
    Inventors: Bernd Peifer, Helmut G. Alt, M. Bruce Welch
  • Patent number: 5670589
    Abstract: In accordance with the present invention, there is provided an organoaluminoxy product prepared by the process comprising reacting an organoaluminoxane with an ene-ol compound. In another embodiment, the organoaluminoxane can be prepared in situ by the process comprising reacting a hydrocarbylaluminum compound, water, and the ene-ol compound. Further there is provided olefin polymerization catalyst systems comprising the organoaluminoxy product and at least one transition metal-containing catalyst. Optionally, the catalyst system is prepolymerized in the presence of at least one olefin to form a prepolymerized catalyst system. Still further there is provided processes for the polymerization of olefins using the catalyst systems.
    Type: Grant
    Filed: February 8, 1995
    Date of Patent: September 23, 1997
    Assignee: Phillips Petroleum Company
    Inventors: Rolf L. Geerts, M. Bruce Welch, Syriac J. Palackal, Helmut G. Alt, Bernd Peifer, Harold R. Deck
  • Patent number: 5668230
    Abstract: A catalyst system and process for polymerizing olefins employing a cocatalyst and specific ethylene bridged fluorenyl-containing metallocenes having substituents which result in high yields of polyethylene and/or high molecular weight polyethylene.
    Type: Grant
    Filed: July 11, 1996
    Date of Patent: September 16, 1997
    Assignee: Phillips Petroleum Company
    Inventors: Peter Schertl, Helmut G. Alt, M. Bruce Welch
  • Patent number: 5654454
    Abstract: Double bound metallocenes, i.e. metallocenes having a cyclopentadienyl-containing radical that is bound to a transition metal both by a pi bond and by a sigma carbon bond of a substituent of that same cyclopentadienyl-containing radical can be prepared by reducing metallocenes having a cyclopentadienyl-containing radical having at least one an unsaturated substituent. Also a process for producing polymers comprising contacting at least one olefinic monomer under suitable polymerization conditions with such double bound metallocenes.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: August 5, 1997
    Assignee: Phillips Petroleum Company
    Inventors: Bernd Peifer, Helmut G. Alt, M. Bruce Welch
  • Patent number: 5650528
    Abstract: In accordance with the present invention there is provided a cyclopentadienyl-type ligand represented by the formula ZA, wherein Z is a cyclopentadienyl-type group, wherein A is --YPR.sub.2, --YNR.sub.2, or --NR.sub.2, wherein Y is an alkylene group containing 1 to 24 carbon atoms, wherein each R is individually selected from alkyl groups containing 1 to 20 carbon atoms. Another aspect of the invention is to provide a metallocene represented by the formula ZAMX.sub.3, wherein Z and A are as described above, M is a Group IVB or VB transition metal, and X is a halide. Other aspects of the present invention include catalyst systems comprising the metallocenes and an organoaluminoxane, processes for preparing the above defined ligands, metallocenes and catalyst systems, and polymerization processes employing the catalyst systems.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: July 22, 1997
    Assignee: Phillips Petroleum Company
    Inventors: Krisztina Frey, Gabriele von Massow, Helmut G. Alt, M. Bruce Welch
  • Patent number: 5646323
    Abstract: In accordance with the present invention there is provided a cyclopentadienyl-type ligand represented by the formula ZA, wherein Z is a cyclopentadienyl-type group, wherein A is --YPR.sub.2, --YNR.sub.2, or --NR.sub.2, wherein Y is an alkylene group containing 1 to 24 carbon atoms, wherein each R is individually selected from alkyl groups containing 1 to 20 carbon atoms. Another aspect of the invention is to provide a metallocene represented by the formula ZAMX.sub.3, wherein Z and A are as described above, M is a Group IVB or VB transition metal, and X is a halide. Other aspects of the present invention include catalyst systems comprising the metallocenes and an organoaluminoxane, processes for preparing the above defined ligands, metallocenes and catalyst systems, and polymerization processes employing the catalyst systems.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: July 8, 1997
    Assignee: Phillips Petroleum Company
    Inventors: Krisztina Frey, Gabriele von Massow, Helmut G. Alt, M. Bruce Welch
  • Patent number: 5637744
    Abstract: Group IVB metal metallocenes of bis(1-methyl fluorenyl) diphenyl silane and bis(1-methyl fluorenyl) dimethyl tin are disclosed, plus their use in the production of polyolefins, including isotactic polypropylene.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: June 10, 1997
    Assignee: Phillips Petroleum Company
    Inventors: Helmut G. Alt, Konstantinos Patsidis, M. Bruce Welch, Peter P. Chu
  • Patent number: 5631203
    Abstract: Metallocene compounds and processes for preparing such metallocene compounds are provided. Such processes for preparing such metallocene compounds comprise reacting an alkynyl ligand, an alkali metal compound, and a transition metal-containing compound.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: May 20, 1997
    Assignee: Phillips Petroleum Company
    Inventors: M. Bruce Welch, Helmut G. Alt, Bernd Peifer