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: 10465025
    Abstract: A propylene-based impact copolymer having a high gloss and suitable for appliance components comprising a polypropylene homopolymer and within a range of from 6 wt % to 20 wt % of propylene copolymer based on the weight of the impact copolymer, wherein the copolymer comprises from 20 wt % to 44 wt % ethylene, and/or C4 to C10 ?-olefin derived units and the remainder propylene-derived units based on the weight of the propylene copolymer, the impact copolymer having a melt flow rate (230° C./2.16 kg) within a range of from 10 g/10 min to 50 g/10 min.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: November 5, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Chon-Yie Lin, Todd S. Edwards, Christopher G. Bauch, Prasadarao Meka
  • Patent number: 9902822
    Abstract: Disclosed herein are embodiments of films which comprise a polypropylene resin comprising at least 50 mol % propylene, an MWD (Mw/Mn) of greater than 5, a branching index (g?) of at least 0.95, and a melt strength of at least 20 cN determined using an extensional rheometer at 190° C. A method of making a film is also disclosed.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: February 27, 2018
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Saifudin M. Abubakar, Prasadarao Meka, Stefan B. Ohlsson
  • Publication number: 20170267794
    Abstract: A propylene-based impact copolymer having a high gloss and suitable for appliance components comprising a polypropylene homopolymer and within a range of from 6 wt % to 20 wt % of propylene copolymer based on the weight of the impact copolymer, wherein the copolymer comprises from 20 wt % to 44 wt % ethylene, and/or C4 to C10 ?-olefin derived units and the remainder propylene-derived units based on the weight of the propylene copolymer, the impact copolymer having a melt flow rate (230° C./2.16 kg) within a range of from 10 g/10 min to 50 g/10 min.
    Type: Application
    Filed: May 31, 2017
    Publication date: September 21, 2017
    Inventors: Chon-Yie Lin, Todd S. Edwards, Christopher G. Bauch, Prasadarao Meka
  • Patent number: 9745395
    Abstract: A propylene-based impact copolymer (ICP) and composition including the ICP, the ICP comprising a polypropylene homopolymer and within the range of from 10 wt % to 45 wt % of propylene copolymer based on the weight of the ICP, wherein the copolymer comprises from 20 wt % to 44 wt % ethylene, 1-butene, 1-hexene and/or 1-octene derived units and from 80 to 60 wt % propylene-derived units based on the weight of the propylene copolymer, the propylene-based impact copolymer having a Melt Flow Rate (230° C./2.16 kg) within the range of from 10 g/10 mm to 50 g/10 mm and an Elongation at Break of greater than 70%.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: August 29, 2017
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Prasadarao Meka, Chon-Yie Lin, Todd S. Edwards, Christopher G. Bauch
  • Publication number: 20170022308
    Abstract: A propylene-based impact copolymer (ICP) and composition including the ICP, the ICP comprising a polypropylene homopolymer and within the range of from 10 wt % to 45 wt % of propylene copolymer based on the weight of the ICP, wherein the copolymer comprises from 20 wt % to 44 wt % ethylene, 1-butene, 1-hexene and/or 1-octene derived units and from 80 to 60 wt % propylene-derived units based on the weight of the propylene copolymer, the propylene-based impact copolymer having a Melt Flow Rate (230° C./2.16 kg) within the range of from 10 g/10 mm to 50 g/10 mm and an Elongation at Break of greater than 70%.
    Type: Application
    Filed: March 4, 2016
    Publication date: January 26, 2017
    Inventors: Prasadarao Meka, Chon-Yie Lin, Todd S. Edwards, Christopher G. Bauch
  • Patent number: 9464178
    Abstract: Disclosed herein are molded articles, foamed articles, and foamable resins comprising a polypropylene resin comprising at least 50 mol % propylene, an MWD (Mw/Mn) of greater than 5, a branching index (g?) of at least 0.95, and a melt strength of at least 20 cN determined using an extensional rheometer at 190° C. Methods of making a molded article and making a foamed article are also disclosed.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: October 11, 2016
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Saifudin M. Abubakar, Anthony Poloso, Prasadarao Meka
  • Patent number: 9453093
    Abstract: Polypropylene resin comprising at least 50 mol % propylene, an MWD (Mw/Mn) of greater than 5, a branching index (g?) of at least 0.95, and a melt strength of at least 20 cN determined using an extensional rheometer at 190° C. A catalyst system comprising a Ziegler-Natta catalyst comprising a non-aromatic internal electron donor, and first and second external electron donors comprising different organosilicon compounds, and a method to produce a polypropylene resin comprising contacting propylene monomers at propylene polymerization conditions with the catalyst system are also disclosed.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: September 27, 2016
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Prasadarao Meka, Saifudin M. Abubakar, Yumin Chen, Todd S. Edwards
  • Patent number: 9321914
    Abstract: This invention relates to a process for producing propylene-based in-reactor compositions comprising: (a) contacting propylene and from about 0 wt % to 10 wt % C2 and/or C4 to C20 alpha olefins under polymerization conditions in a first stage to form Component A; (b) contacting Component A, ethylene and from about 3 wt % to 30 wt % of one or more C3 to C20 alpha olefin, in the presence of a metallocene catalyst system, under polymerization conditions in a second stage to form Component B; wherein the metallocene catalyst system comprises: (i) a metallocene compound comprising a group 4, 5, or 6 metal, (ii) an activator, and (iii) a support material; and (c) obtaining a propylene-based in-reactor composition comprising Component A and Component B, wherein the propylene-based in-reactor composition has a multimodal melting point. Propylene-based in-reactor compositions and articles comprising these propylene compositions are also disclosed.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: April 26, 2016
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Matthew W. Holtcamp, Prasadarao Meka, Celestino M. Perez, Jr., Gregory S. Day
  • Patent number: 9309334
    Abstract: A propylene-based impact copolymer (ICP) and composition including the ICP, the ICP comprising a polypropylene homopolymer and within the range of from 10 wt % to 45 wt % of propylene copolymer based on the weight of the ICP, wherein the copolymer comprises from 20 wt % to 44 wt % ethylene, 1-butene, 1-hexene and/or 1-octene derived units and from 80 to 56 wt % propylene-derived units based on the weight of the propylene copolymer, the propylene-based impact copolymer having a Melt Flow Rate (230° C./2.16 kg) within the range of from 10 g/10 min to 50 g/10 min and an Elongation at Break of greater than 70%.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: April 12, 2016
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Prasadarao Meka, Chon-Yie Lin, Todd S. Edwards, Christopher G. Bauch
  • Publication number: 20160082690
    Abstract: Described herein are fibers, nonwoven fabrics, and other nonwoven articles comprising a blend of at least one propylene-based elastomer and a broad molecular weight polypropylene or a broad molecular weight impact copolymer. The broad molecular weight polypropylene has a molecular weight distribution (MWD) of greater than 4.5. The impact copolymer is a reactor blend and comprises a propylene homopolymer component and a copolymer component, where the propylene homopolymer component has a molecular weight distribution (MWD) of greater than 4.5.
    Type: Application
    Filed: June 12, 2014
    Publication date: March 24, 2016
    Inventors: Vincent B. Gallez, Galen C. Richeson, Prasadarao Meka, John W. M. Roberts
  • Publication number: 20160076171
    Abstract: Described herein are fibers, nonwoven fabrics, and other nonwoven articles comprising a blend of at least one propylene-based elastomer and an impact copolymer. The impact copolymer is a reactor blend and comprises a propylene homopolymer component and a copolymer component, where the copolymer component comprises less than about 55 wt % ethylene-derived units, based on the weight of the copolymer component.
    Type: Application
    Filed: June 12, 2014
    Publication date: March 17, 2016
    Inventors: Vincent B. Gallez, Galen C. Richeson, Prasadarao Meka, John W. M. Roberts
  • Publication number: 20150291755
    Abstract: Disclosed herein are molded articles, foamed articles, and foamable resins comprising a polypropylene resin comprising at least 50 mol % propylene, an MWD (Mw/Mn) of greater than 5, a branching index (g?) of at least 0.95, and a melt strength of at least 20 cN determined using an extensional rheometer at 190° C. Methods of making a molded article and making a foamed article are also disclosed.
    Type: Application
    Filed: October 8, 2013
    Publication date: October 15, 2015
    Inventors: Saifudin M. Abubakar, Anthony Poloso, Prasadarao Meka
  • Publication number: 20150284521
    Abstract: Disclosed herein are embodiments of films which comprise a polypropylene resin comprising at least 50 mol % propylene, an MWD (Mw/Mn) of greater than 5, a branching index (g?) of at least 0.95, and a melt strength of at least 20 cN determined using an extensional rheometer at 190° C. A method of making a film is also disclosed.
    Type: Application
    Filed: October 8, 2013
    Publication date: October 8, 2015
    Inventors: Saifudin M. Abubakar, Prasadarao Meka, Stefan B. Ohlsson
  • Publication number: 20150252127
    Abstract: Polypropylene resin comprising at least 50 mol % propylene, an MWD (Mw/Mn) of greater than 5, a branching index (g?) of at least 0.95, and a melt strength of at least 20 cN determined using an extensional rheometer at 190° C. A catalyst system comprising a Ziegler-Natta catalyst comprising a non-aromatic internal electron donor, and first and second external electron donors comprising different organosilicon compounds, and a method to produce a polypropylene resin comprising contacting propylene monomers at propylene polymerization conditions with the catalyst system are also disclosed.
    Type: Application
    Filed: October 8, 2013
    Publication date: September 10, 2015
    Inventors: Prasadarao Meka, Saifudin M. Abubakar, Yumin Chen, Todd S. Edwards
  • Publication number: 20150197583
    Abstract: A propylene-based impact copolymer (ICP) and composition including the ICP, the ICP comprising a polypropylene homopolymer and within the range of from 10 wt % to 45 wt % of propylene copolymer based on the weight of the ICP, wherein the copolymer comprises from 20 wt % to 44 wt % ethylene, 1-butene, 1-hexene and/or 1-octene derived units and from 80 to 60 wt % propylene-derived units based on the weight of the propylene copolymer, the propylene-based impact copolymer having a Melt Flow Rate (230° C./2.16 kg) within the range of from 10 g/10 min to 50 g/10 min and an Elongation at Break of greater than 70%.
    Type: Application
    Filed: December 11, 2014
    Publication date: July 16, 2015
    Inventors: Prasadarao Meka, Chon-Yie Lin, Todd S. Edwards, Christopher G. Bauch
  • Publication number: 20140121325
    Abstract: This invention relates to a process for producing propylene-based in-reactor compositions comprising: (a) contacting propylene and from about 0 wt % to 10 wt % C2 and/or C4 to C20 alpha olefins under polymerization conditions in a first stage to form Component A; (b) contacting Component A, ethylene and from about 3 wt % to 30 wt % of one or more C3 to C20 alpha olefin, in the presence of a metallocene catalyst system, under polymerization conditions in a second stage to form Component B; wherein the metallocene catalyst system comprises: (i) a metallocene compound comprising a group 4, 5, or 6 metal, (ii) an activator, and (iii) a support material; and (c) obtaining a propylene-based in-reactor composition comprising Component A and Component B, wherein the propylene-based in-reactor composition has a multimodal melting point. Propylene-based in-reactor compositions and articles comprising these propylene compositions are also disclosed.
    Type: Application
    Filed: October 11, 2013
    Publication date: May 1, 2014
    Inventors: Matthew W. Holtcamp, Prasadarao Meka, Celestino M. Perez, JR., Gregory S. Day
  • Patent number: 8664129
    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: Grant
    Filed: November 14, 2008
    Date of Patent: March 4, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Narayanaswami Raja Dharmarajan, Prasadarao Meka
  • Patent number: 8198373
    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: Grant
    Filed: October 2, 2006
    Date of Patent: June 12, 2012
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Patrick Brant, Bryan R. Chapman, Narayanaswami Raja Dharmarajan, Prasadarao Meka
  • Patent number: 8076419
    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: November 10, 2010
    Date of Patent: December 13, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Prasadarao Meka, Kevin Wayne Lawson
  • Publication number: 20110105690
    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: November 10, 2010
    Publication date: May 5, 2011
    Inventors: Prasadarao MEKA, Kevin Wayne Lawson