Patents by Inventor Prasadarao Meka

Prasadarao Meka 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: 7851554
    Abstract: Disclosed is a propylene impact copolymer comprising a first polypropylene having an MFR1 within the range from 15 to 40 dg/min; a second polypropylene having an MFR2 within the range from 50 to 190 dg/min; an elastomeric polymer; and wherein the propylene impact copolymer has an MFRICP within the range from 6 to 18 dg/min; a 1% Secant Flexural Modulus of greater than 150 kpsi (1030 MPa); and an Izod Impact at 25° C. of greater than 10 ft-lbs/in (530 J/m). The impact copolymer may be produced in a two or three tandem-reactor system wherein the catalyst composition used in the second reactor to produce the second polypropylene is different from the catalyst composition used in the first reactor to produce the first polypropylene.
    Type: Grant
    Filed: October 27, 2008
    Date of Patent: December 14, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Prasadarao Meka, Kevin Wayne Lawson
  • Patent number: 7816447
    Abstract: The invention relates to the production of polymers using polymerization processes and reactor systems including a plurality of multi-zone circulating reactors. In particular, the invention relates to the production of impact copolymers using reactor systems including a plurality of multi-zone circulating reactors.
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: October 19, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Kevin Wayne Lawson, Lawrence Carl Smith, Randell Wayne Dickey, Robert Tan Li, Prasadarao Meka
  • Patent number: 7790795
    Abstract: Provided is a polymer composition comprising a thermoplastic, an ethylene alpha-olefin plastomer, a fibrous inosilicate and a slip agent. The polymer composition exhibits superior scratch and mar resistance as indicated by a Ford Five Finger scratch resistance on Ford Fawn 2ZK grain of at least 15 N. Also provided are shaped articles made from the polymer compositions. Also provided are methods for making scratch and mar resistant polymer compositions. Finally, articles made from the polymer compositions are also provided, particularly automotive exterior, interior and fascia parts, requiring scratch and mar resistance.
    Type: Grant
    Filed: May 25, 2006
    Date of Patent: September 7, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jean-Roch Schauder, Jeffrey Valentage, Prasadarao Meka, Alan Joseph Oshinski, Jared Michael Hill, Vincent B. B. G. Gallez
  • Publication number: 20100124864
    Abstract: Disclosed is a multilayer fabric and a method of forming a multilayer fabric comprising one or more facing layers and one or more elastic layers adjacent to or sandwiched there between, the one or more facing layers comprising a polypropylene; and a propylene-?-olefin elastomer having and an MFR of less than 80 dg/min; wherein the facing layer is extensible and non-elastic and has a Handle-O-Meter value of less than 60 g and a 1% Secant Flexural Modulus of less than 1000 MPa. In certain embodiments, polyethylenes are absent from the facing layer(s).
    Type: Application
    Filed: November 14, 2008
    Publication date: May 20, 2010
    Inventors: Raja N. Dharmarajan, Prasadarao Meka
  • Publication number: 20100125118
    Abstract: Plastic toughened plastics include a polymer composition having a polypropylene component and a second polymer component. The polypropylene component is present in an amount from about 50 to about 95 weight percent based on the total weight of the blend. The second polymer component is present in an amount from about 5 to about 50 weight percent based on the total weight of the blend, is a BOCD or BCD blend of at least two ssPE components, and has an overall density greater than about 0.90 g/cm3. Optionally, the plastic toughened plastics include one or more third polymer component selected from propylene-olefin elastomers and ethylene-propylene rubbers, which are present in an amount from about 1 to about 50 weight percent, based on the total weight of the blend.
    Type: Application
    Filed: October 2, 2006
    Publication date: May 20, 2010
    Inventors: Patrick Brant, Bryan R. Chapman, Narayanaswami Raja Dharmarajan, Prasadarao Meka
  • Publication number: 20100105848
    Abstract: Disclosed is a propylene impact copolymer comprising a first polypropylene having an MFR1 within the range from 15 to 40 dg/min; a second polypropylene having an MFR2 within the range from 50 to 190 dg/min; an elastomeric polymer; and wherein the propylene impact copolymer has an MFRICP within the range from 6 to 18 dg/min; a 1% Secant Flexural Modulus of greater than 150 kpsi (1030 MPa); and an Izod Impact at 25° C. of greater than 10 ft-lbs/in (530 J/m). The impact copolymer may be produced in a two or three tandem-reactor system wherein the catalyst composition used in the second reactor to produce the second polypropylene is different from the catalyst composition used in the first reactor to produce the first polypropylene.
    Type: Application
    Filed: October 27, 2008
    Publication date: April 29, 2010
    Inventors: Prasadarao Meka, Kevin Wayne Lawson
  • Patent number: 7544420
    Abstract: The present invention relates to new backing layers and/or new substrates for making (1) new multilayer structures formed from one or more ionomers and one or more tie-layers, and optionally a new backing layer to form laminates, (2) new composite articles made from these laminates in combination with optional new substrate materials, and (3) new methods of making composite articles from these laminates by shaping and subsequently contacting them with a substrate material.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: June 9, 2009
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Joseph Dominic Domine, Jeffrey Valentage, Prasadarao Meka
  • Patent number: 7405008
    Abstract: The present invention includes a laminate and formation of a laminate having at least one layer of an ionomer and at least one layer of an acid polymer or blend of acid polymer and a thermoplastic polyolefin that can be thermoformed to form a shaped laminate. The shaped laminate can then be contacted with a plastic substrate such as a thermoplastic polyolefin to form a composite article by such means as, for example, injection molding. The laminate can be pigmented to eliminate the need to paint the surface of the plastic substrate. Impact and scratch resistant articles can be formed from the laminated substrate such as automotive parts, appliance body parts and sporting equipment.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: July 29, 2008
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Joseph D. Domine, Jeffrey Valentage, Prasadarao Meka
  • Patent number: 7335424
    Abstract: A co-extruded laminate of at least one layer of an ionomer and at least one layer of an acid polymer that can be thermoformed with a plastic substrate such as a polyolefin. The laminate can be pigmented to eliminate the need to paint the surface of the plastic substrate. Articles can be formed from the laminated substrate such as automotive parts and sporting equipment.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: February 26, 2008
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Joseph D. Domine, Jeffrey Valentage, Prasadarao Meka
  • Publication number: 20080045675
    Abstract: The invention relates to the production of polymers using polymerization processes and reactor systems including a plurality of multi-zone circulating reactors. In particular, the invention relates to the production of impact copolymers using reactor systems including a plurality of multi-zone circulating reactors.
    Type: Application
    Filed: August 23, 2004
    Publication date: February 21, 2008
    Inventors: Kevin Larson, Lawrence Smith, Randell Dickey, Robert Li, Prasadarao Meka
  • Publication number: 20070276063
    Abstract: Provided is a polymer composition comprising a thermoplastic, an ethylene alpha-olefin plastomer, a fibrous inosilicate and a slip agent. The polymer composition exhibits superior scratch and mar resistance as indicated by a Ford Five Finger scratch resistance on Ford Fawn 2ZK grain of at least 15 N. Also provided are shaped articles made from the polymer compositions. Also provided are methods for making scratch and mar resistant polymer compositions. Finally, articles made from the polymer compositions are also provided, particularly automotive exterior, interior and fascia parts, requiring scratch and mar resistance.
    Type: Application
    Filed: May 25, 2006
    Publication date: November 29, 2007
    Inventors: Jean-Roch Schauder, Jeffrey Valentage, Prasadarao Meka, Alan Joseph Oshinski, Jared Michael Hill, Vincent B. B. G. Gallez
  • Patent number: 7247679
    Abstract: Hetero phase polymer compositions are described. The compositions may have polypropylene component, a modifier component and a compatibilizer component. The modifier component may in some embodiments be an ethylene ?-olefin copolymer with a density ?0.905 g/cm3. In other embodiments the modifier component may be a blend of a copolymer with a density of ?0.905 g/cm3, and an ethylene ?-olefin copolymer of lower, more traditional density.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: July 24, 2007
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Sudhin Datta, Narayanaswami Raja Dharmarajan, Prasadarao Meka
  • Patent number: 7217766
    Abstract: Hetero phase polymer compositions are described. The compositions may have polypropylene component, a modifier component and a compatibilizer component. The modifier component may in some embodiments be an ethylene ?-olefin copolymer with a density ?0.905 g/cm3. In other embodiments the modifier component may be a blend of a copolymer with a density of ?0.905 g/cm3, and an ethylene ?-olefin copolymer of lower, more traditional density.
    Type: Grant
    Filed: May 28, 2004
    Date of Patent: May 15, 2007
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Sudhin Datta, Narayanaswami Raja Dharmarajan, Prasadarao Meka
  • Patent number: 7183234
    Abstract: The present invention provides catalyst systems including a Ziegler-Natta or Ziegler-Natta-type catalyst in combination with a mixture of certain electron donors.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: February 27, 2007
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Robert Tan Li, Kevin Wayne Lawson, Aspy Keki Mehta, Prasadarao Meka
  • Patent number: 7105603
    Abstract: Disclosed herein are various compositions that have particular utility in automotive components, including compositions that include: (a) polypropylene having a melting point of 110° C. or more; (b) ethylene ?-olefin polymer in which the ?-olefin is C4 or higher; and (c) propylene polymer, having 60 wt % or more units derived from propylene, including isotactically arranged propylene derived sequences and a heat of fusion less than 45 J/g.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: September 12, 2006
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Narayanaswami Raja Dharmarajan, Michael Glenn Williams, Sudhin Datta, Prasadarao Meka, Srivatsan Srinivas
  • Publication number: 20050245698
    Abstract: The present invention provides catalyst systems including a Ziegler-Natta or Ziegler-Natta-type catalyst in combination with a mixture of certain electron donors.
    Type: Application
    Filed: April 29, 2004
    Publication date: November 3, 2005
    Inventors: Robert Li, Kevin Lawson, Aspy Mehta, Prasadarao Meka
  • Publication number: 20050227022
    Abstract: The present invention includes a laminate and formation of a laminate having at least one layer of an ionomer and at least one layer of an acid polymer or blend of acid polymer and a thermoplastic polyolefin that can be thermoformed to form a shaped laminate. The shaped laminate can then be contacted with a plastic substrate such as a thermoplastic polyolefin to form a composite article by such means as, for example, injection molding. The laminate can be pigmented to eliminate the need to paint the surface of the plastic substrate. Impact and scratch resistant articles can be formed from the laminated substrate such as automotive parts, appliance body parts and sporting equipment.
    Type: Application
    Filed: May 31, 2005
    Publication date: October 13, 2005
    Inventors: Joseph Domine, Jeffrey Valentage, Prasadarao Meka
  • Publication number: 20050221077
    Abstract: A co-extruded laminate of at least one layer of an ionomer and at least one layer of an acid polymer that can be thermoformed with a plastic substrate such as a polyolefin. The laminate can be pigmented to eliminate the need to paint the surface of the plastic substrate. Articles can be formed from the laminated substrate such as automotive parts and sporting equipment.
    Type: Application
    Filed: May 31, 2005
    Publication date: October 6, 2005
    Inventors: Joseph Domine, Jeffrey Valentage, Prasadarao Meka
  • Publication number: 20050054781
    Abstract: Disclosed herein are various compositions that have particular utility in automotive components, including compositions that include: (a) polypropylene having a melting point of 110° C. or more; (b) ethylene a-olefin polymer in which the ?-olefin is C4 or higher; and (c) propylene polymer, having 60 wt % or more units derived from propylene, including isotactically arranged propylene derived sequences and a heat of fusion less than 45 J/g.
    Type: Application
    Filed: July 21, 2004
    Publication date: March 10, 2005
    Inventors: Narayanaswami Dharmarajan, Michael Williams, Sudhin Datta, Prasadarao Meka, Srivatsan Srinivas
  • Publication number: 20050009991
    Abstract: Embodiments of the present invention include a composition formed from (a) 50 wt % to 85 wt % of at least one impact copolymer relative to the total weight of the composition, the impact copolymer comprising up to 25 wt % of an ethylene-propylene rubber, the rubber having a content of ethylene-derived units of from 40 wt % to 60 wt % relative to the rubber; and (b) 50 wt % to 15 wt % of at least one plastomer relative to the total weight of the composition, wherein the plastomer is a copolymer of ethylene derived units and at least one of C3 to C8 ?-olefin derived units from 5 wt % to 30 wt % of the plastomer. The composition is useful for automotive components, especially interior automotive components such as airbag covers, the composition having a secant flexural modulus of at least 50 kpsi (345 MPa) and 100% ductility down to ?40° C.
    Type: Application
    Filed: November 5, 2002
    Publication date: January 13, 2005
    Inventors: Prasadarao Meka, Jeffrey Valentage, Paul Burke