Patents Represented by Attorney, Agent or Law Firm Darrell E. Warner
  • Patent number: 6818585
    Abstract: The present invention relates to a cyclic germanium bridged bulky ligand metallocene-type catalyst compound, a catalyst system thereof, and to its use in a process for polymerizing olefin(s) to produce enhanced processability polymers.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: November 16, 2004
    Assignee: Univation Technologies, LLC
    Inventors: Donna J. Crowther, Phillip T. Matsunaga, Ching-Tai Lue
  • Patent number: 6803430
    Abstract: The present invention relates to a process for polymerizing olefin(s) in the presence of metallocene-type catalyst compound, an activator and an inorganic oxide support, a Group 13 containing compound and a carboxylic acid, where the carboxylic acid is added to the polymerization reactor separately. The invention also relates to a process for transitioning from one polymerization catalyst to another.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: October 12, 2004
    Assignee: Univation Technologies, LLC
    Inventors: Agapios K. Agapiou, Chi-I Kuo
  • Patent number: 6605675
    Abstract: The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containing solution to form the completed catalyst composition for introduction into the polymerization reactor. The invention is also directed to methods of preparing the catalyst component slurry, the catalyst component solution and the catalyst compositions, to methods of controlling the properties of polymer products utilizing the catalyst compositions, and to polymers produced therefrom.
    Type: Grant
    Filed: December 4, 2000
    Date of Patent: August 12, 2003
    Assignee: Univation Technologies, LLC
    Inventors: Simon Mawson, Sun-Chueh Kao, Tae Hoon Kwalk, Timothy Roger Lynn, David H. McConville, Matthew Gary McKee, John Francis Szul, Kersten Anne Terry, Timothy T. Wenzel, Mark Gregory Goode, John Henry Oskam, Robert J. Jorgensen, Robert Harold Vogel
  • Patent number: 6605560
    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: March 13, 1997
    Date of Patent: August 12, 2003
    Assignee: Univation Technologies, LLC
    Inventor: Main Chang
  • Patent number: 6492472
    Abstract: The present invention relates to 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 there use in a polymerization process to produce polymers having an unexpected improvement in processability.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: December 10, 2002
    Assignee: Univation Technologies, LLC
    Inventors: Ching-Tai Lue, Donna J. Crowther
  • Patent number: 6489263
    Abstract: This invention relates to an olefin polymerization catalyst composition comprising the product of the combination of at least one activator and at least two different transition metal compounds each of which is represented by the formula: ((Z)XAt(YJ))qMQn  (I) where M is a metal selected from Group 3 to 13 or lanthanide and actinide series of the Periodic Table of Elements; Q is bonded to M and each Q is a monovalent, divalent or trivalent anion; X and Y are bonded to M; X and Y are independently C or a heteroatom, provided that at least one of X and Y is a heteroatom and Y is contained in a heterocyclic ring J, where J comprises from 2 to 50 non-hydrogen atoms; Z is bonded to X, where Z comprises 1 to 50 non-hydrogen atoms; t is 0 or 1; when t is 1, A is a bridging group joined to at least one of X, Y or J; q is 1 or 2; n is the oxidation state of M minus q if Q is a monovalent anion, n is (the oxidation state of M−q)/2, if Q is a bivalent anion or n is (the oxidation state of M−q)/3
    Type: Grant
    Filed: April 26, 2001
    Date of Patent: December 3, 2002
    Assignee: Univation Technologies, LLC
    Inventors: Rex E. Murray, Simon Mawson, Clark C. Williams, D. James Schreck
  • Patent number: 6346586
    Abstract: The present invention relates to a supported catalyst composition and a method for making the supported catalyst composition and its use in a process for polymerizing olefin(s). In particular, the invention is directed to a method for making a supported catalyst composition by combining a heated bulky ligand metallocene-type catalyst system with a carrier or an optionally heated carrier.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: February 12, 2002
    Assignee: Univation Technologies, LLC
    Inventors: Agapios K. Agapiou, Chi-I Kuo, David M. Glowczwski, Steven K. Ackerman
  • Patent number: 6255410
    Abstract: The invention relates to processes for producing polyolefins at pressures substantially below conventional high pressure conditions in two-phase conditions below the cloud point. The invention can involve a continuous system with optional recycle.
    Type: Grant
    Filed: September 2, 1997
    Date of Patent: July 3, 2001
    Assignee: Exxon Mobil Chemical Patents Inc.
    Inventors: Hayashi Shigekauzu, Makoto Sugawara, Norbert Baron, Charles Stanley Speed, Jo Ann Marie Canich, Howard Curtis Welborn, Jr.
  • Patent number: 6231936
    Abstract: Provided are articles such as packaging materials and medical devices having enhanced tolerance to radiation and heat, produced from a blend of from about 99% to about 50% by weight homo or copolymerized polypropylene and about 1% to about 50% by weight polyethylene produced by single-site catalysis, such polyethylene having a MWD between about 1 and about 4, and a CDBI greater than about 45%. Optionally, other blend components may be added, such as hindered amine stabilizers, secondary antioxidants, clarifying nucleators and secondary antioxidants. Also provided are processes for producing such articles.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: May 15, 2001
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: ReneƩ A. Kozimor, Robert C. Portnoy
  • Patent number: 5747592
    Abstract: A thermoplastic polymer composition incorporating at least about 50 wt % polypropylene, at least about 20 wt % of an elastomer such as EP rubber and at least about 4 wt % plastomer. The plastomer is preferably a single site catalyzed ethylene based copolymer having a density less than about 0.915. By adjusting the amount of the plastomer in the composition, considerable control is secured over post-mold shrinkage of components produced through injection molding operations utilizing the composition. The composition can be prepared as a reactor blend or a melt blend. The composition is particularly useful in producing large components such as bumpers and exterior trim fascia for automobiles.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: May 5, 1998
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Terrence Huff, James John McAlpin
  • Patent number: 5530065
    Abstract: Heat sealed articles and heat sealable films comprising a polymer blend of a first polymer having a narrow molecular weight and composition distribution and a second polymer having a broad molecular weight distribution and composition distribution. The articles and films have significantly improved physical characteristics and remarkably low heat seal initiation temperatures, high seal strength, high hot tack and therefore provide improved processibility and higher line speeds on commercial heat sealing equipment.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: June 25, 1996
    Assignee: Exxon Chemical Patents Inc.
    Inventors: James M. Farley, Prasadarao Meka, Ferdinand C. Stehling, Barry C. Trudell, Myron B. Kurtzman
  • Patent number: 5491207
    Abstract: Disclosed is a process for preparing high molecular weight ethylene-.alpha.-olefin elastomers, preferably an ethylene-propylene elastomer, by liquid phase polymerization of the requisite monomers in the presence of a metallocene/alumoxane catalyst complex. Preferably, the process is carried out as a slurry polymerization utilizing the metallocene/alumoxane catalyst in supported form on a silica gel support with the .alpha.-olefin monomer maintained in liquid state and used in excess to serve as a polymerization diluent. The metallocene component of the catalyst by which the process is practiced is of the formula: ##STR1## wherein M is zirconium, titanium or hafnium; R.sup.1 and R.sup.2 are independently a C.sub.1 -C.sub.20 linear, branched or cyclic alkyl group; X an alkyl, aryl, halide, hydride or oxygen bridge of a zirconocene dimer; "y" and "z" are independently numbers 0, 1 or 2; and M is preferably zirconium.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: February 13, 1996
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Elvin L. Hoel
  • Patent number: 5488078
    Abstract: Disclosed are compositions of a two-phase mixture of a structural bitumen component and a thermoplastic polymer derived predominantly of ethylene and at least one other non-cyclic alpha-olefin, wherein the polymer has a crystallinity of less than 18% and a solubility distribution index value of less than C. Also disclosed is a method for producing such compositions. Such compositions are particularly useful as road paving and construction materials.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: January 30, 1996
    Assignee: Exxon Chemical Patents Inc.
    Inventors: John R. Shutt, Benoit M. F. Touzard
  • Patent number: 5432242
    Abstract: A process for preparing olefinic polymers by metallocene catalyzed olefin polymerisation in which at least one volatile catalyst kill agent is introduced. A non-volatile catalyst kill agent may also be used in conjunction with the volatile catalyst kill agent. Water may be used as the volatile agent and compounds containing a terminal hydroxy group, oxygen, nitrogen or sulfur may constitute the non-volatile agent. Purified monomer is recycled to the reactor.
    Type: Grant
    Filed: August 23, 1993
    Date of Patent: July 11, 1995
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Norbert Baron