Patents by Inventor Rohan A. Hule

Rohan A. Hule 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: 20190144576
    Abstract: Polyethylene compositions including at least 65 wt % ethylene derived units, based upon the total weight of the polyethylene composition, are provided.
    Type: Application
    Filed: October 5, 2018
    Publication date: May 16, 2019
    Inventors: Ching-Tai Lue, Adriana S. Silva, Matthew W. Holtcamp, David F. Sanders, Ryan W. Impelman, Richard E. Pequeno, Charles J. Harlan, Xuan Ye, Dongming Li, Rohan A. Hule, Matthew S. Bedoya
  • Patent number: 10266685
    Abstract: The present invention relates to a bimodal polypropylene composition comprising a blend of a HMW polypropylene component and a LMW polypropylene component, where the high molecular weight (HMW) component of the bimodal composition has a z-average molecular weight Mz of more than 400,000 g/mole, and a process to make such composition. The composition is suitable for thermoformed articles and injection molded articles.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: April 23, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Yi Ping Ni, Rohan A. Hule, Sudhin Datta
  • Publication number: 20180258203
    Abstract: Bimodal polypropylene compositions and a process to form melt blended bimodal polypropylene compositions comprising combining at least two polypropylenes in at least a two-pass process, and forming a bimodal polypropylene composition having a Flexural Modulus (190° C., 1% secant) of at least 1700 MPa, as well as one or more other selected properties. These compositions are suitable for thermoformed articles and injection molded articles, any of which may be foamed.
    Type: Application
    Filed: August 4, 2015
    Publication date: September 13, 2018
    Inventors: Rohan A. Hule, Sudhin Datta, Yi Ping Ni
  • Publication number: 20180186986
    Abstract: This invention relates to a polyolefin composition with (a) 80 to 90 wt % of an amorphous ethylene-propylene copolymer having either no crystallinity or crystallinity derived from ethylene, having about 30 wt % or more units derived from ethylene; (b) 5 to 15 wt % of a semi-crystalline ethylene-propylene copolymer having substantial crystallinity derived from ethylene and having 70 wt % or more units derived from ethylene; and (c) 1 to 5 wt % of a propylene-based elastomer having within the range from 5 to 25 wt % ethylene derived units and having a melting point temperature of less than 110° C. and a Mw/Mn within the range from 2.0 to 4.0.
    Type: Application
    Filed: November 17, 2017
    Publication date: July 5, 2018
    Inventors: Xin Chen, Sudhin Datta, Rohan A. Hule
  • Patent number: 9994658
    Abstract: This invention relates to a process to polymerize olefins comprising: i) contacting one or more olefins with a catalyst system comprising: 1) a support comprising an organoaluminum treated layered silicate and an inorganic oxide; and 2) a bisphenolate compound; and ii) obtaining olefin polymer having high molecular weight and layered silicate dispersed therein. Preferably the support is in the form of spheroidal particles.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: June 12, 2018
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Crisita Carmen H. Atienza, Matthew W. Holtcamp, Xuan Ye, Gregory S. Day, David A. Cano, Machteld M. W. Mertens, Gerardo J. Majano Sanchez, Rohan A. Hule
  • Patent number: 9982067
    Abstract: This invention relates to a process to polymerize olefins comprising: i) contacting one or more olefins with a catalyst system comprising: 1) a support comprising an organoaluminum treated layered silicate and an inorganic oxide; and 2) a pyridyldiamido compound; and ii) obtaining olefin polymer having high molecular weight and layered silicate dispersed therein. Preferably the support is in the form of spheroidal particles.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: May 29, 2018
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Matthew W. Holtcamp, John R. Hagadorn, Gregory S. Day, Machteld M. W. Mertens, Gerardo J. Majano Sanchez, Rohan A. Hule
  • Publication number: 20180134828
    Abstract: This invention relates to ethylene polymers obtained using a catalyst system comprising fluorided silica, alkylalumoxane activator and at least two metallocene catalyst compounds (a bridged monocyclopentadienyl group 4 transition metal compound and a biscyclopentadientyl group 4 transition metal compound), where the fluorided support has not been calcined at a temperature of 400° C. or more, and is preferably produced using a wet mixing method, such as an aqueous method. The ethylene polymers have: 1) at least 50 mol % ethylene; 2) a reversed comonomer index, mol %, (RCI,m) of 85 or more; 3) a Comonomer Distribution Ratio-2 (CDR-2,m) of the percent comonomer at the z average molecular weight divided by the percent comonomer at the weight average molecular weight plus the number average molecular weight divided by 2 ([% comonomer at Mz]/[% comonomer at ((Mw+Mn)/2)] as determined by GPC of 2.3 or more; and 4) a density of 0.91 g/cc or more.
    Type: Application
    Filed: April 19, 2016
    Publication date: May 17, 2018
    Inventors: Antonios K. DOUFAS, David F. SANDERS, Matthew W. HOLTCAMP, Xuan YE, Alexander I. NORMAN, Rohan A. HULE, Hasnain RANGWALLA
  • Publication number: 20180079845
    Abstract: This invention relates to new multimodal and/or broad molecular weight high density polyethylene polymers. The polymers may be made in a single reactor, preferably a gas phase reactor using a dual catalyst system comprising a pyridyldiamido transition metal compound, a metallocene compound, a support, and optionally an activator.
    Type: Application
    Filed: April 20, 2016
    Publication date: March 22, 2018
    Inventors: Antonios K. Doufas, David F. Sanders, Alexander I. Norman, Matthew W. Holtcamp, Keith R. Green, Rohan A. Hule, Derek W. Thurman
  • Publication number: 20180022907
    Abstract: The present invention relates to a bimodal polypropylene composition comprising a blend of a HMW polypropylene component and a LMW polypropylene component, where the high molecular weight (HMW) component of the bimodal composition has a z-average molecular weight Mz of more than 400,000 g/mole, and a process to make such composition. The composition is suitable for thermoformed articles and injection molded articles.
    Type: Application
    Filed: June 20, 2017
    Publication date: January 25, 2018
    Inventors: Yi Ping Ni, Rohan A. Hule, Sudhin Datta
  • Publication number: 20170275443
    Abstract: Disclosed is a thermoplastic polyolefin composition useful in automotive components comprising at least a polypropylene having a melting point temperature (Tm) of greater than 130° C. and a melt flow rate (230° C./2.16 kg) within the range from 10 g/10 min to 80 g/10 min; an amorphous ethylene-propylene copolymer comprising within the range from 40 wt % to 80 wt % ethylene derived units and having a melt flow rate (230° C./2.16 kg) within the range from 0.1 g/10 min to 20 g/10 min; and a propylene-based elastomer having within the range from 5 to 25 wt % ethylene derived units and having a Tm of less than 110° C. The composition only partially breaks or there is no break at ?29° C. (ASTM D256) with Notched Izod Force of between 10 to 40 ft-lb/in2 at 22° C. (533 to 2,132 J/m2), and between 1.0 to 12 ft-lb/in2 at ?29° C. (53 to 636 J/m2).
    Type: Application
    Filed: August 21, 2015
    Publication date: September 28, 2017
    Applicant: ExxonMobil Chemical Patents Inc.
    Inventors: Sudhin Datta, Xin Chen, Abdul M. Jangda, Rohan A. Hule, Jan Kalfus
  • Publication number: 20170233566
    Abstract: A bimodal polypropylene composition of at least a high molecular weight, predominantly isotactic, narrow molecular weight distribution polypropylene having a heat of fusion of 70 to 100 J/g, and a low molecular weight, predominantly isotactic, narrow molecular weight distribution polypropylene having a heat of fusion of 70 to 100 J/g, wherein the high molecular weight polymer and low molecular weight polymer are sufficiently miscible to impart a single glass transition temperature and a single melting point to the polymer blend, has improved processibility and stiffness compared to a single narrow molecular weight distribution isotactic polypropylene of the average of the components.
    Type: Application
    Filed: August 4, 2015
    Publication date: August 17, 2017
    Inventors: Sudhin Datta, Rohan A. Hule, Xin Chen, Feng Li
  • Patent number: 9725569
    Abstract: This invention relates to high porosity (?15%) and/or low pore diameter (PD<165 ?m) propylene polymers and propylene polymerization processes using single site catalyst systems with supports having high surface area (SA?400 m2/g), low pore volume (PV?2 mL/g), a specific mean pore diameter range (PD=1-20 nm), and high average particle size (PS?30 ?m).
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: August 8, 2017
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Matthew W. Holtcamp, Gregory S. Day, Jian Yang, Lubin Luo, Steven D. Brown, Rohan A. Hule
  • Patent number: 9676882
    Abstract: This invention relates to processes using staged hydrogen addition in propylene polymerization. Using this process, broad/bi-modal MWD iPP with excellent stiffness properties and melt flow rates were produced.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: June 13, 2017
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Matthew W. Holtcamp, Jian Yang, Celestino M. Perez, Jr., Gregory S. Day, Rohan A. Hule
  • Publication number: 20170096511
    Abstract: This invention relates to a process to polymerize olefins comprising: i) contacting one or more olefins with a catalyst system comprising: 1) a support comprising an organoaluminum treated layered silicate and an inorganic oxide; and 2) a bisphenolate compound; and ii) obtaining olefin polymer having high molecular weight and layered silicate dispersed therein. Preferably the support is in the form of spheroidal particles.
    Type: Application
    Filed: August 19, 2016
    Publication date: April 6, 2017
    Inventors: Crisita Carmen H. Atienza, Matthew W. Holtcamp, Xuan Ye, Gregory S. Day, David A. Cano, Machteld M. W. Mertens, Gerardo J. Majano Sanchez, Rohan A. Hule
  • Publication number: 20170088641
    Abstract: This invention relates to a process to polymerize olefins comprising: i) contacting one or more olefins with a catalyst system comprising: 1) a support comprising an organoaluminum treated layered silicate and an inorganic oxide; and 2) a pyridyldiamido compound; and ii) obtaining olefin polymer having high molecular weight and layered silicate dispersed therein. Preferably the support is in the form of spheroidal particles.
    Type: Application
    Filed: August 17, 2016
    Publication date: March 30, 2017
    Inventors: Matthew W. Holtcamp, John R. Hagadorn, Gregory S. Day, Machteld M. W. Mertens, Gerardo J. Majano Sanchez, Rohan A. Hule
  • Publication number: 20160355653
    Abstract: This invention relates to high porosity (?15%) and/or low pore diameter (PD<165 ?m) propylene polymers and propylene polymerization processes using single site catalyst systems with supports having high surface area (SA?400 m2/g), low pore volume (PV?2 mL/g), a specific mean pore diameter range (PD=1-20 nm), and high average particle size (PS?30 ?m).
    Type: Application
    Filed: April 29, 2016
    Publication date: December 8, 2016
    Inventors: Matthew W. Holtcamp, Gregory S. Day, Jian Yang, Lubin Luo, Steven D. Brown, Rohan A. Hule
  • Publication number: 20160137763
    Abstract: This invention relates to processes using staged hydrogen addition in propylene polymerization. Using this process, broad/bi-modal MWD iPP with excellent stiffness properties and melt flow rates were produced.
    Type: Application
    Filed: January 22, 2016
    Publication date: May 19, 2016
    Inventors: Matthew W. Holtcamp, Jian Yang, Celestino M. Perez, JR., Gregory S. Day, Rohan A. Hule
  • Patent number: 9279024
    Abstract: This invention relates to processes using staged hydrogen addition in propylene polymerization. Using this process, broad/bi-modal MWD iPP with excellent stiffness properties and melt flow rates were produced.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: March 8, 2016
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Matthew W. Holtcamp, Jian Yang, Celestino M. Perez, Jr., Gregory S. Day, Rohan A. Hule
  • Publication number: 20150119537
    Abstract: This invention relates to processes using staged hydrogen addition in propylene polymerization. Using this process, broad/bi-modal MWD iPP with excellent stiffness properties and melt flow rates were produced.
    Type: Application
    Filed: October 9, 2014
    Publication date: April 30, 2015
    Inventors: Matthew W. Holtcamp, Jian Yang, Celestino M. Perez, JR., Gregory S. Day, Rohan A. Hule