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).

  • Publication number: 20040241479
    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: Application
    Filed: April 16, 2004
    Publication date: December 2, 2004
    Inventors: Joseph Dominic Domine, Jeffrey Valentage, Prasadarao Meka
  • Publication number: 20040220341
    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 &agr;-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 &agr;-olefin copolymer of lower, more traditional density.
    Type: Application
    Filed: May 28, 2004
    Publication date: November 4, 2004
    Inventors: Sudhin Datta, Narayanaswami Raja Dharmarajan, Prasadarao Meka
  • Publication number: 20040161623
    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: April 6, 2004
    Publication date: August 19, 2004
    Inventors: Joseph D Domine, Jeffrey Valentage, Prasadarao Meka
  • Publication number: 20040132913
    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 &agr;-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 &agr;-olefin copolymer of lower, more traditional density.
    Type: Application
    Filed: October 17, 2003
    Publication date: July 8, 2004
    Inventors: Sudhin Datta, Narayanaswami Dharmarajan, Prasadarao Meka
  • Publication number: 20040076846
    Abstract: A laminate structure having at least one layer of an ionomer resin (a) and at least one layer of an acid polymer or a blend of an acid polymer and a thermoplastic polyolefin (b) that can be thermoformed to form a shaped article and additional polyolefin substrate can be provided. The laminate can be pigmented to eliminate the need to paint the surface of the plastic substrate. The laminate is useful in the production of automotive parts and sports equipment.
    Type: Application
    Filed: August 25, 2003
    Publication date: April 22, 2004
    Inventors: Joseph D Domine, Jeffrey Valentage, Prasadarao Meka
  • Patent number: 6630538
    Abstract: Thermoplastic elastomer compositions having improved processabillity while maintaining good physical properties are prepared from a mixture of olefinic rubber and a polypropylene composition having a melt flow rate in the range of from about 0.5 to about 5 dg/min. and a molecular weight distribution Mw/Mn of greater than 5.5 up to about 20. The rubber component of the mixture may be at least partially cured by dynamic vulcanization.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: October 7, 2003
    Inventors: Maria D. Ellul, Prasadarao Meka, Kang-Bo Wang, Yu-Feng Wang
  • Patent number: 6399707
    Abstract: A polymeric material suitable for fabrication into an article and particularly a polymeric material suitable for fabrication into an article suitable for receiving paint is provided. The polymeric material may be a blend of impact copolymer and plastomer. The impact copolymer includes between 95 and 78 wt % homopolypropylene and between 5 and 22 wt % of ethylene-propylene rubber, wherein ethylene propylene rubber may have less than about 50 wt % ethylene. The plastomer may be an ethylene/hexene plastomer. The ethylene/hexene plastomer may have a density in the range from 0.88 to 0.915 g/cc and a melt index (dg/min) from 0.8 to 10. The impact copolymer may be present in the blend in a range of 95 to 70 wt % and the ethylene/hexene plastomer may be present in the blend in a range from 5 to 30 wt %. The propylene, ethylene and hexene components may be present in the blend in respective ranges of 73.2 to 84.2 wt %, 14.3 to 23.1 wt % and 1.5 to 3.7 wt %.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: June 4, 2002
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Prasadarao Meka, Jeffrey Valentage, Paul J. Burke, Kris K. Killinger, James T. Luce
  • 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: 5294678
    Abstract: A grafted and/or functionalized macromolecule comprises entanglement-inhibited architecture wherein the polymer exhibits reduced melt viscosity. In one embodiment, the macromolecule comprises a polymer of an isoolefin having about 4 to about 7 carbon atom and a para-alkylstyrene, wherein a grafted macromonomer such as a terminally functionalized polystyryl chain of very narrow molecular weight distribution is attached to the para-alkyl group of the para-alkylstyrene such that entanglement of adjacent chains in the melt are inhibited. In addition to distributed macromonomer grafts, other functionality may be attached to the para-alkyl group of the para-alkylstyrene to introduce other desirable properties such as radiation curability. In another embodiment the macromolecule comprises a polymer of one or more simple olefinic monomers wherein a macromolecule is attached to pendent functionality and/or copolymerized into the polymer backbone.
    Type: Grant
    Filed: January 27, 1993
    Date of Patent: March 15, 1994
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Mun-Fu Tse, Anthony J. Dias, Prasadarao Meka, Kenneth O. McElrath
  • Patent number: 5206303
    Abstract: A grafted and/or functionalized macromolecule comprises entanglement-inhibited architecture wherein the polymer exhibits reduced melt viscosity. In one embodiment, the macromolecule comprises a polymer of an isoolefin having about 4 to about 7 carbon atom and a para-alkylstyrene, wherein a grafted macromonomer such as a terminally functionalized polystyryl chain of very narrow molecular weight distribution is attached to the para-alkyl group of the para-alkylstyrene such that entanglement of adjacent chains in the melt are inhibited. In addition to distributed macromonomer grafts, other functionality may be attached to the para-alkyl group of the para-alkylstyrene to introduce other desirable properties such as radiation curability. In another embodiment the macromolecule comprises a polymer of one or more simple olefinic monomers wherein a macromolecule is attached to pendent functionality and/or copolymerized into the polymer backbone.
    Type: Grant
    Filed: December 27, 1990
    Date of Patent: April 27, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Mun-Fu Tse, Anthony J. Dias, Prasadarao Meka, Kenneth O. McElrath