Patents by Inventor I-Hwa Lee

I-Hwa Lee 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: 20210371712
    Abstract: Embodiments of the present disclosure are directed to a thermoplastic adhesive composition comprising: at least one maleic anhydride-grafted ethylene-based polymer; at least one at least one ethylene/?-olefin/non-conjugated diene interpolymer having a molecular weight distribution (MWD) ?2.5, wherein MWD=Mw/Mn, wherein Mw is weight averaged molecular weight and Mn is number averaged molecular weight, which are both determined by gel permeation chromatography; a very low density polyethylene (VLDPE) having a density in the range 0.885 to 0.915 grams/cm3; and optionally at least one ethylene alkyl (meth)acrylate copolymer, wherein the alkyl group comprises one to four carbon atoms.
    Type: Application
    Filed: June 26, 2019
    Publication date: December 2, 2021
    Applicant: Performance Materials NA, Inc.
    Inventors: Camille Olry, Karlheinz Hausmann, I-Hwa Lee
  • Publication number: 20210252838
    Abstract: Embodiments of the present disclosure are directed to coextruded multilayer films comprising a comprising a plurality of layers, wherein at least one layer comprises the thermoplastic adhesive composition, the thermoplastic adhesive composition comprising: at least one maleic anhydride-grafted ethylene-based polymer; at least one at least one ethylene/?-olefin/non-conjugated diene interpolymer having a molecular weight distribution (MWD)?2.5, wherein MWD=Mw/Mn, wherein Mw is weight averaged molecular weight and Mn is number averaged molecular weight, which are both determined by gel permeation chromatography; and a very low density polyethylene (VLDPE) having a density in the range 0.885 to 0.915 grams/cm3.
    Type: Application
    Filed: June 26, 2019
    Publication date: August 19, 2021
    Applicant: Performance Materials NA, Inc.
    Inventors: Camille Olry, Karlheinz Hausmann, I-Hwa Lee
  • Patent number: 10421258
    Abstract: Disclosed is a composition that comprises or is produced from a first ethylene ?-olefin copolymer, a modified first ethylene ?-olefin copolymer, and a second ethylene ?-olefin copolymer or propylene ?-olefin copolymer. Also disclosed is a multilayer film or sheet structure containing at least one barrier layer; at least one predominantly propylene-based layer, at least one predominantly ethylene-based layer, or both; and at least one adhesive layer produced from the composition. Further disclosed is a produced for producing a multilayer structure using the composition as adhesive layer.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: September 24, 2019
    Assignee: Performance Materials NA, Inc.
    Inventors: I-Hwa Lee, Karlheinz Hausmann
  • Patent number: 10414139
    Abstract: Provided are functionalized polypropylene adhesive compositions having a desirable range of melt flow rate. These compositions are obtained by grafting at least one impact polypropylene copolymer or by co-grafting a blend containing at least one impact polypropylene copolymer and at least one random polypropylene copolymer. The polypropylene copolymer(s) are grafted with one or more ethylenically unsaturated carboxylic acids or derivatives of these acids, such as anhydrides. Maleic anhydride is a preferred grafting monomer. Also provided is a multilayer film or sheet structure containing at least one barrier layer and at least one adhesive layer produced from the functionalized polypropylene adhesive composition. The multilayer film or sheet structure may also contain at least one predominantly polypropylene-based layer.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: September 17, 2019
    Assignee: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: I-Hwa Lee, Qian Deng
  • Publication number: 20170266933
    Abstract: Disclosed is a composition that comprises or is produced from a first ethylene ?-olefin copolymer, a modified first ethylene ?-olefin copolymer, and a second ethylene ?-olefin copolymer or propylene ?-olefin copolymer. Also disclosed is a multilayer film or sheet structure containing at least one barrier layer; at least one predominantly propylene-based layer, at least one predominantly ethylene-based layer, or both; and at least one adhesive layer produced from the composition. Further disclosed is a produced for producing a multilayer structure using the composition as adhesive layer.
    Type: Application
    Filed: August 13, 2015
    Publication date: September 21, 2017
    Inventors: I-Hwa Lee, Karlheinz Hausmann
  • Publication number: 20170058068
    Abstract: Provided are functionalized polypropylene adhesive compositions having a desirable range of melt flow rate. These compositions are obtained by grafting at least one impact polypropylene copolymer or by co-grafting a blend containing at least one impact polypropylene copolymer and at least one random polypropylene copolymer. The polypropylene copolymer(s) are grafted with one or more ethylenically unsaturated carboxylic acids or derivatives of these acids, such as anhydrides. Maleic anhydride is a preferred grafting monomer. Also provided is a multilayer film or sheet structure containing at least one barrier layer and at least one adhesive layer produced from the functionalized polypropylene adhesive composition. The multilayer film or sheet structure may also contain at least one predominantly polypropylene-based layer.
    Type: Application
    Filed: August 25, 2016
    Publication date: March 2, 2017
    Inventors: I-HWA LEE, Qian Deng
  • Publication number: 20170058159
    Abstract: Provided are functionalized polypropylene adhesive compositions having a desirable range of melt flow rate. These compositions are obtained by grafting at least one impact polypropylene copolymer or by co-grafting a blend containing at least one impact polypropylene copolymer and at least one random polypropylene copolymer. The polypropylene copolymer(s) are grafted with one or more ethylenically unsaturated carboxylic acids or derivatives of these acids, such as anhydrides. Maleic anhydride is a preferred grafting monomer. Also provided is a multilayer film or sheet structure containing at least one barrier layer and at least one adhesive layer produced from the functionalized polypropylene adhesive composition. The multilayer film or sheet structure may also contain at least one predominantly polypropylene-based layer.
    Type: Application
    Filed: August 25, 2016
    Publication date: March 2, 2017
    Inventors: I-HWA LEE, Qian Deng
  • Patent number: 9511569
    Abstract: A multilayer film structure is disclosed which comprises at least a first layer made of a bio-based polymer composition; a tie layer comprising one or more ethylene copolymers and one or more inorganic fillers; and optionally at least one additional layer.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: December 6, 2016
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Lucie Charbonnel, Karlheinz Hausmann, I-Hwa Lee, Cedric Thomi
  • Patent number: 9061819
    Abstract: A polymeric film, multiple-compartment container having an internal frangible seal comprising a curved portion and variable width with a maximum width near the portion of the curve having the smallest radius of curvature, for confining a fluid and related beverage container with a re-closable fitment for storing and delivering two different flavored liquids or the like. The frangible seal of the container will burst when sustained squeezed thus allowing the components in the container to mix within the container.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: June 23, 2015
    Assignees: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: James P. Kane, Jr., I-Hwa Lee, Donna Lynn Visioli, Jose Tirso Olivares-Cordoba, James A. Shoemaker
  • Patent number: 8945708
    Abstract: Decorative ionomeric surfaced film and sheet (e.g., multilayer co-extruded polymer) and articles made therefrom (e.g., automotive panels and parts) exhibiting good weatherability, mar resistance, and surface appearance of a high quality automotive finish (including color, haze, gloss, and DOI) and economical process for making (e.g., co-extrusion) and using (e.g., thermoforming and injection backfilling) the same.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: February 3, 2015
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Randall Allen Vogel, I-Hwa Lee, Sumita Sanjeevi Ranganathan, Lori J. Pike
  • Patent number: 8858985
    Abstract: Films comprising a liquid-absorbent layer with an adsorbed antimicrobial material and an impermeable layer are provided. The films can be suitable for preparation of tubular casings and shrinkbags such as casings for foodstuffs. Also disclosed are foodstuffs processed in the tubular casing comprising the antimicrobial material.
    Type: Grant
    Filed: May 11, 2005
    Date of Patent: October 14, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: I-Hwa Lee, Karlheinz Hausmann
  • Patent number: 8679619
    Abstract: Decorative ionomeric surfaced film and sheet (e.g., multilayer co-extruded polymer) and articles made therefrom (e.g., automotive panels and parts) exhibiting good weatherability, mar resistance, and surface appearance of a high quality automotive finish (including color, haze, gloss, and DOI) and economical process for making (e.g., co-extrusion) and using (e.g., thermoforming and injection backfilling) the same.
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: March 25, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Randall Allen Vogel, I-Hwa Lee, Sumita Sanjeevi Ranganathan, Lori J. Pike
  • Patent number: 8202590
    Abstract: Heat shrinkable oriented multilayer films are disclosed that comprise a structural layer, a heat sealing layer and a gas barrier layer. The structural layer comprises a polymer selected from the group consisting of copolymers of ethylene and a C3 to C8,-ethylenically unsaturated carboxylic acid, ionomers of the copolymers, polyesters, and blends thereof. The heat sealing layer comprises a polymer selected from the group consisting of ethylene vinyl acetate copolymers, ethylene alkyl acrylate copolymers, ethylene alkyl methacrylate copolymers, polyethylene, and blends thereof. The barrier layer, which is positioned between the structural and heat sealing layer, comprises at least one ethylene vinyl alcohol copolymer that has from about 2 to about 8 mol % 1,2-glycol structural units incorporated in the copolymer backbone chain. The films are particularly suitable for use in manufacture of shrinkbags.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: June 19, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: I-Hwa Lee, Heiko E. Schenck
  • Patent number: 8119235
    Abstract: Decorative ionomeric surfaced film and sheet (e.g., multilayer co-extruded polymer) and articles made therefrom (e.g., automotive panels and parts) exhibiting good weatherability, mar resistance, and surface appearance of a high quality automotive finish (including color, haze, gloss, and DOI) and economical process for making (e.g., co-extrusion) and using (e.g., thermoforming and injection backfilling) the same.
    Type: Grant
    Filed: July 11, 2007
    Date of Patent: February 21, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Randall Allen Vogel, I-Hwa Lee, Sumita Sanjeevi Ranganathan, Lori J. Pike
  • Publication number: 20110253296
    Abstract: Polymer compositions that can be useful as sealants for peelably and/or permanently sealed packages are provided. The polymer compositions comprise at least one ethylene copolymer and at least one propylene polymer. Also provided are packages sealed with the compositions of the invention, and methods of making packages comprising the compositions of the invention.
    Type: Application
    Filed: June 21, 2011
    Publication date: October 20, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: I-Hwa Lee, Karlheinz Hausmann
  • Patent number: 7968134
    Abstract: Films comprising a liquid-absorbant layer and an impermeable layer are provided. Processes for manufacturing these films is also provided. The films are suitable for preparation of tubular casings and shrinkbags, in particular, casings for smoked foodstuffs. Also described are foodstuffs processed in the tubular casings.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: June 28, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: I-Hwa Lee, James Michael McKenna, Raghuram Narumanchi
  • Patent number: 7964229
    Abstract: Films comprising a liquid-absorbant layer and an impermeable layer are provided. Processes for manufacturing these films is also provided. The films are suitable for preparation of tubular casings and shrinkbags, in particular, casings for smoked foodstuffs. Also described are foodstuffs processed in the tubular casings.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: June 21, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: I-Hwa Lee, James Michael McKenna, Raghuram Narumanchi
  • Patent number: 7964226
    Abstract: Films comprising a liquid-absorbant layer and an impermeable layer are provided. Processes for manufacturing these films is also provided. The films are suitable for preparation of tubular casings and shrinkbags, in particular, casings for smoked foodstuffs. Also described are foodstuffs processed in the tubular casings.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: June 21, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: I-Hwa Lee, James Michael McKenna, Raghuram Narumanchi
  • Patent number: 7964055
    Abstract: Films comprising a liquid-absorbant layer and an impermeable layer are provided. Processes for manufacturing these films is also provided. The films are suitable for preparation of tubular casings and shrinkbags, in particular, casings for smoked foodstuffs. Also described are foodstuffs processed in the tubular casings.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: June 21, 2011
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: I-Hwa Lee, James Michael McKenna, Raghuram Narumanchi
  • Publication number: 20100166925
    Abstract: Films comprising a liquid-absorbant layer and an impermeable layer are provided. Processes for manufacturing these films is also provided. The films are suitable for preparation of tubular casings and shrinkbags, in particular, casings for smoked foodstuffs. Also described are foodstuffs processed in the tubular casings.
    Type: Application
    Filed: September 22, 2009
    Publication date: July 1, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: I-Hwa Lee, James Michael McKenna, Raghuram Narumanchi