Patents by Inventor Abbas Razavi

Abbas Razavi 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).

  • Linear Low Density Polymers Having Optical and Processing Capabilities of Low Density Polyethyelene
    Publication number: 20080188632
    Abstract: The present invention discloses a catalyst system that comprises several bridged bis- or bis-tetrahydro-indenyl components having different substitution patterns in order to prepare polymers having a broad molecular weight distribution.
    Type: Application
    Filed: October 24, 2005
    Publication date: August 7, 2008
    Applicant: TOTAL PETROCHEMICALS RESEARCH FELUY
    Inventor: Abbas Razavi
  • Catalyst system comprising a mixture of catalyst components for producing a polyolefin blend
    Patent number: 7396888
    Abstract: Provided is a catalyst system for producing a polyolefin blend, which catalyst system comprises a mixture including the following catalyst components: i) a catalyst component A capable of producing an isotactic olefin polymer, and/or a catalyst component A? capable of producing a polymer comprising an isotactic polyolefin block; and ii) a catalyst component B capable of producing a syndiotactic polyolefin, and/or a catalyst component B? capable of producing a polymer comprising a syndiotactic polyolefin block; wherein each of the components in the catalyst system is distinct from the other components in the catalyst system.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: July 8, 2008
    Assignee: TOTAL Petrochemicals Research Feluy
    Inventor: Abbas Razavi
  • Ldpe-Like Polymers With Bisindeny-Based Ligands Having Different Rings
    Publication number: 20080146752
    Abstract: The present invention discloses a catalyst system that comprises several bridged pseudo-bisindenyl components that are structurally different in order to prepare polymers having a broad molecular weight distribution.
    Type: Application
    Filed: October 24, 2005
    Publication date: June 19, 2008
    Inventor: Abbas Razavi
  • Group IIIb metal complexes with “constrained geometry” fluorenyl based ligands
    Patent number: 7388062
    Abstract: The present invention discloses a metallocene catalyst component based on a Group IIIb metal of the periodic Table and a bridged heteroatom-fluorenyl ligand. It also discloses its method of preparation and its use in polymerisation.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: June 17, 2008
    Assignee: Fina Technology, Inc.
    Inventors: Abbas Razavi, Jean-François Carpentier, Evgueni Kirillov
  • Activating Agents for Hafnium-Based Metallocene Components
    Publication number: 20080108765
    Abstract: The present invention discloses an active metallocene catalyst system prepared with a hafnium-based metallocene catalyst system and an activating agent comprising an aluminoxane and a sterically hindered Lewis base.
    Type: Application
    Filed: October 20, 2005
    Publication date: May 8, 2008
    Inventors: Vincenzo Busico, Roberta Cipullo, Roberta Pellecchia, Abbas Razavi
  • Polyolefins Prepared From A Metallocene And A New Single Site Catalyst Component In A Single Reactor
    Publication number: 20080108766
    Abstract: The present invention discloses a catalyst system based on a metallocene catalyst component and a new single site catalyst component for the production in a single reactor of improved polyolefins having a bimodal molecular weight distribution.
    Type: Application
    Filed: October 20, 2005
    Publication date: May 8, 2008
    Applicant: TOTAL PETROCHEMICALS RESEARCH FELUY
    Inventor: Abbas Razavi
  • SYNDIOTACTIC POLYPROPYLENE AND METHODS OF PREPARING SAME
    Publication number: 20080097052
    Abstract: A syndiotactic polypropylene comprising a melting temperature of greater than 160° C., a percentage of syndiotactic pentads greater than 95%, a toluene soluble fraction of equal to or less than 0.4, and a molecular weight of from 10,000 Daltons to 1,000,000 Daltons. A syndiotactic polypropylene comprising a melting temperature of greater than 170° C., a molecular weight of from 100,000 Daltons to 300,000 Daltons, a molecular weight distribution of less than 3, and a toluene soluble fraction of less than 0.4. A syndiotactic polypropylene comprising a tensile modulus of equal to or greater than 60,000 psi, a tensile strength at yield of equal to or greater than 3,600 psi, a tensile strength at break of equal to or greater than 3,900 psi, an elongation at yield of equal to or greater than 13%, and an elongation at break of equal to or greater than 400%.
    Type: Application
    Filed: October 23, 2006
    Publication date: April 24, 2008
    Inventors: Vladimir Marin, Abbas Razavi
  • Preparation and use of tetrasubstituted fluorenyl catalysts for polymerization of olefins
    Patent number: 7335711
    Abstract: Catalyst compositions and processes for the polymerization of ethylenically unsaturated monomers to produce polymers, including copolymers or homopolymers. Such monomers include ethylene, C3+ alpha olefins and substituted vinyl compounds, such as styrene and vinyl chloride. The polymerization catalyst characterized by the formula B(FluL)MQn in which Flu is a fluorenyl group substituted at at least the 2,7- and 3,6-positions by hydrocarbyl groups, preferably relatively bulky hydrocarbyl groups.
    Type: Grant
    Filed: August 17, 2005
    Date of Patent: February 26, 2008
    Assignee: Fina Technology, Inc.
    Inventors: Vladimir Marin, Abbas Razavi
  • ISOTACTIC-ATACTIC POLYPROPYLENE AND METHODS OF MAKING SAME
    Publication number: 20080027193
    Abstract: A method of producing a polymer comprising contacting in a reaction zone under conditions suitable for polymerization of an alpha-olefin monomer with a metallocene catalyst having at least three asymmetric centers, and recovering an alpha-olefin polymer from the reaction zone. A method of polymerizing propylene comprising contacting in a reaction zone propylene, a cocatalyst, and a metallocene catalyst having the formula including stereoisomers: and recovering polypropylene from the reaction zone. A polypropylene composition having a tensile modulus from 40,000 psi to 300,000 psi, a tensile strength at yield from 2,000 psi to 6,000 psi, a tensile strength at break from 1,000 psi to 3,500 psi, a tensile strength from 1,000 psi to 5,000 Kpsi, an elongation at yield of greater than or equal to 10%, and an elongation at break from 50% to 500%.
    Type: Application
    Filed: July 31, 2006
    Publication date: January 31, 2008
    Applicant: Fina Technology, Inc.
    Inventors: Vladimir Marin, Abbas Razavi
  • Preparation and Use of Tetrasubstituted Fluorenyl Catalysts for Polymerization of Olefins
    Publication number: 20080026935
    Abstract: Catalyst compositions and processes for the polymerization of ethylenically unsaturated monomers to produce polymers, including copolymers or homopolymers. Such monomers include ethylene, C3+ alpha olefins and substituted vinyl compounds, such as styrene and vinyl chloride. The polymerization catalyst characterized by the formula B(FluL)MQn in which Flu is a fluorenyl group substituted at at least the 2,7- and 3,6-positions by hydrocarbyl groups, preferably relatively bulky hydrocarbyl groups.
    Type: Application
    Filed: October 5, 2007
    Publication date: January 31, 2008
    Applicant: Fina Technology, Inc.
    Inventors: Vladimir Marin, Abbas Razavi
  • FLUORENYL CATALYST COMPOSITIONS AND OLEFIN POLYMERIZATION PROCESS
    Publication number: 20080027189
    Abstract: An olefin polymerization process comprising contacting one or more olefins and a catalyst component in a reaction zone under suitable reaction conditions to form a polyolefin, wherein the catalyst component is characterized by the formula: B(Cp)(Fl)MQ2 wherein M comprises a metal, Q comprises a halogen, an alkyl group or an aryl group or combinations thereof, Cp comprises a cyclopentadienyl group, Fl comprises a fluorenyl group, B is a bridging group that may be characterized by the general formula —YRH wherein Y comprises C or Si and R comprises an alkyl group, an aryl group, a poly-aryl group or combinations thereof.
    Type: Application
    Filed: July 25, 2006
    Publication date: January 31, 2008
    Inventors: Vladimir Marin, Abbas Razavi
  • Group III bridged ionic metallocene based on cyclopentadienyl-fluorenyl ligands
    Patent number: 7309748
    Abstract: The present invention discloses a metallocene catalyst component of the formula (I) [(Flu-R?-Cp)2M]?[Li(ether)4]+, wherein Cp is a cyclopentadienyl, substituted or unsubstituted, Flu is a fluorenyl, substituted or unsubstitutted, M is a metal Group III of the Periodic Table, and R? is a structural bridge between Cp and Flu imparting stereorigidity to the component. It further discloses a process for preparing said metallocene catalyst component and its use in controlled polymerisation.
    Type: Grant
    Filed: January 23, 2004
    Date of Patent: December 18, 2007
    Assignee: Total Petrochemicals Research Feluy
    Inventors: Jean-Francois Carpentier, Evgueni Kirillov, Abbas Razavi
  • Catalyst Support
    Publication number: 20070276105
    Abstract: The present invention discloses a solid support having a crystal lattice with crystal faces that are modified with respect to orientation characterized in that an olefin polymerization catalyst or a pre-catalyst thereof is immobilized on the modified crystal faces. It also discloses a method for preparing said support.
    Type: Application
    Filed: July 28, 2004
    Publication date: November 29, 2007
    Inventor: Abbas Razavi
  • Bidentate catalyst for olefin polymerization, methods of forming such and products therefrom
    Patent number: 7301040
    Abstract: Bidentate catalyst systems and the methods or forming such are described herein. The catalyst systems generally are compounds having the general formula: where R, R1, R2 and R3 are optional and independently selected from hydrogen, C1 to C20 alkyl groups or C6 to C20 aryl groups, A? and A? are independently selected from coordination groups, M is a Group 4 or 5 transition metal, X is selected from halogens, alkyl groups, aromatic groups or combinations thereof and n is less than 4.
    Type: Grant
    Filed: August 18, 2005
    Date of Patent: November 27, 2007
    Assignee: Fina Technology, Inc.
    Inventors: Abbas Razavi, Vladimir P. Marin, Margarito Lopez
  • Fluorinated transition metal catalysts and formation thereof
    Publication number: 20070254800
    Abstract: Supported catalyst systems and methods of forming the same are generally described herein. The methods generally include providing a support material including silica-alumina prepared by cogel methods, contacting the support material with a fluorinating agent to form a fluorinated support and contacting the fluorinated support with a transition metal compound to form a supported catalyst system.
    Type: Application
    Filed: April 28, 2006
    Publication date: November 1, 2007
    Applicant: Fina Technology, Inc.
    Inventors: Abbas Razavi, Vladimir Marin, Margarito Lopez
  • Fluorinated transition metal catalysts and formation thereof
    Publication number: 20070255022
    Abstract: Supported catalyst systems and methods of forming the same are generally described herein. The methods generally include providing an inorganic support composition, wherein the inorganic support composition includes a bonding sequence selected from Si—O—Al—F, F—Si—O—Al, F—Si—O—Al—F and combinations thereof and contacting the inorganic support composition with a transition metal compound to form a supported catalyst system, wherein the transition metal compound is represented by the formula [L]mM[A]n; wherein L is a bulky ligand, A is a leaving group, M is a transition metal and m and n are such that a total ligand valency corresponds to the transition metal valency.
    Type: Application
    Filed: April 28, 2006
    Publication date: November 1, 2007
    Applicant: Fina Technology, Inc.
    Inventors: Abbas Razavi, Vladimir Marin, Margarito Lopez
  • Process for copolymer production using fluorinated transition metal catalysts
    Publication number: 20070255023
    Abstract: Copolymers and methods of forming copolymers are described herein. The methods generally include providing a transition metal compound represented by the formula [L]mM[A]n, wherein L is a bulky ligand including bis-indenyl, A is a leaving group, M is a transition metal and m and n are such that the total ligand valency corresponds to the transition metal valency and providing a support material having a bonding sequence selected from Si—O—Al—F, F—Si—O—Al, F—Si—O—Al—F and combinations thereof. The methods further include contacting the transition metal compound with the support material to form an active supported catalyst system, wherein the contact of the transition metal compound with the support material occurs in proximity to contact with monomer and contacting the active supported catalyst system with a plurality of monomers to form an olefin copolymer.
    Type: Application
    Filed: September 29, 2006
    Publication date: November 1, 2007
    Applicant: Fina Technology, Inc.
    Inventors: Abbas Razavi, Vladimir P. Marin, Margarito Lopez
  • Process for polyolefin production using fluorinated transition metal catalysts
    Publication number: 20070255024
    Abstract: Supported catalyst systems and methods of forming polyolefins are generally described herein. The polymerization methods generally include introducing an inorganic support material to a reaction zone, wherein the inorganic support material includes a bonding sequence selected from Si—O—Al—F, F—Si—O—Al, F—Si—O—Al—F and combinations thereof, introducing a transition metal compound to the reaction zone and contacting the transition metal compound with the inorganic support material for in situ activation/heterogenization of the transition metal compound to form a catalyst system. The method further includes introducing an olefin monomer to the reaction zone and contacting the catalyst system with the olefin monomer to form a polyolefin.
    Type: Application
    Filed: June 21, 2006
    Publication date: November 1, 2007
    Applicant: Fina Technology, Inc.
    Inventors: Abbas Razavi, Vladimir P. Marin, Margarito Lopez
  • Process for polyolefin production using fluorinated transition metal catalyst
    Publication number: 20070255025
    Abstract: Supported catalyst systems, methods of forming polyolefins and the formed polymers are generally described herein. The methods generally include identifying desired polymer properties, providing a transition metal compound and selecting a support material capable of producing the desired polymer properties, wherein the support material includes a bonding sequence selected from Si—O—Al—F, F—Si—O—Al, F—Si—O—Al—F and combinations thereof.
    Type: Application
    Filed: July 26, 2006
    Publication date: November 1, 2007
    Applicant: Fina Technology, Inc.
    Inventors: Abbas Razavi, Vladimir P. Marin, Margarito Lopez
  • Fluorinated transition metal catalysts and formation thereof
    Publication number: 20070255028
    Abstract: Supported catalyst systems and methods of forming polymers are generally described herein. The polymerization processes generally include contacting an inorganic support composition with a fluorinating agent to form a fluorinated support, wherein the fluorinating agent includes an organofluorine compound having the formula R4nAlF3-n and wherein each R is independently selected from alkyls, aryls and combinations thereof and n is 1 or 2, contacting the fluorinated support with a transition metal compound to form a supported catalyst system and contacting an olefin monomer with the supported catalyst composition to form a polyolefin.
    Type: Application
    Filed: April 28, 2006
    Publication date: November 1, 2007
    Applicant: Fina Technology, Inc.
    Inventors: Abbas Razavi, Vladimir Marin, Margarito Lopez