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).
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Patent number: 11976221Abstract: 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: GrantFiled: June 26, 2019Date of Patent: May 7, 2024Assignee: Dow Global Technologies LLCInventors: Camille Olry, Karlheinz Hausmann, I-Hwa Lee
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Publication number: 20220267578Abstract: The polymer blend includes at least 90% by weight low density polyethylene (LDPE) polymer and from 1% to 10% by weight acid copolymer based on the total weight of the polymer blend. In the polymer blend, the LDPE polymer has a melt index (I? 2#191) from 2 g/10 min to 8 g/10 min as determined in accordance with ASTM D1238, and a molecular weight distribution from 5 to 10.5. In the polymer blend, the acid copolymer is a polymerized reaction product of: at least 60% by weight ethylene, based on the total weight of the monomers present in the ethylene acid copolymer; from 1% to 20% by weight monocarboxylic acid monomer, based on the total weight of the monomers present in the ethylene acid copolymer; and from 0 to 20% by weight alkyl acrylate monomer, based on the total weight of the monomers present in the ethylene acid copolymer.Type: ApplicationFiled: July 27, 2020Publication date: August 25, 2022Applicant: Dow Global Technologies LLCInventors: Yifan Y. Dong, Jong Young Lee, Barry A. Morris, Teresa P. Karjala, Jianping Pan, Guihong Liao, I-Hwa Lee, Carmelo Declet Perez, Michael B. Biscoglio
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Publication number: 20210371712Abstract: 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: ApplicationFiled: June 26, 2019Publication date: December 2, 2021Applicant: Performance Materials NA, Inc.Inventors: Camille Olry, Karlheinz Hausmann, I-Hwa Lee
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Publication number: 20210252838Abstract: 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: ApplicationFiled: June 26, 2019Publication date: August 19, 2021Applicant: Performance Materials NA, Inc.Inventors: Camille Olry, Karlheinz Hausmann, I-Hwa Lee
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Patent number: 10421258Abstract: 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: GrantFiled: August 13, 2015Date of Patent: September 24, 2019Assignee: Performance Materials NA, Inc.Inventors: I-Hwa Lee, Karlheinz Hausmann
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Patent number: 10414139Abstract: 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: GrantFiled: August 25, 2016Date of Patent: September 17, 2019Assignee: E. I. DU PONT DE NEMOURS AND COMPANYInventors: I-Hwa Lee, Qian Deng
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Publication number: 20170266933Abstract: 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: ApplicationFiled: August 13, 2015Publication date: September 21, 2017Inventors: I-Hwa Lee, Karlheinz Hausmann
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Publication number: 20170058159Abstract: 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: ApplicationFiled: August 25, 2016Publication date: March 2, 2017Inventors: I-HWA LEE, Qian Deng
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Publication number: 20170058068Abstract: 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: ApplicationFiled: August 25, 2016Publication date: March 2, 2017Inventors: I-HWA LEE, Qian Deng
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Patent number: 9511569Abstract: 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: GrantFiled: July 2, 2008Date of Patent: December 6, 2016Assignee: E I DU PONT DE NEMOURS AND COMPANYInventors: Lucie Charbonnel, Karlheinz Hausmann, I-Hwa Lee, Cedric Thomi
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Patent number: 9061819Abstract: 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: GrantFiled: May 31, 2007Date of Patent: June 23, 2015Assignees: E I DU PONT DE NEMOURS AND COMPANYInventors: James P. Kane, Jr., I-Hwa Lee, Donna Lynn Visioli, Jose Tirso Olivares-Cordoba, James A. Shoemaker
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Patent number: 8945708Abstract: 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: GrantFiled: January 17, 2012Date of Patent: February 3, 2015Assignee: E. I. du Pont de Nemours and CompanyInventors: Randall Allen Vogel, I-Hwa Lee, Sumita Sanjeevi Ranganathan, Lori J. Pike
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Patent number: 8858985Abstract: 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: GrantFiled: May 11, 2005Date of Patent: October 14, 2014Assignee: E I du Pont de Nemours and CompanyInventors: I-Hwa Lee, Karlheinz Hausmann
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Patent number: 8679619Abstract: 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: GrantFiled: April 12, 2001Date of Patent: March 25, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Randall Allen Vogel, I-Hwa Lee, Sumita Sanjeevi Ranganathan, Lori J. Pike
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Patent number: 8202590Abstract: 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: GrantFiled: July 23, 2007Date of Patent: June 19, 2012Assignee: E. I. du Pont de Nemours and CompanyInventors: I-Hwa Lee, Heiko E. Schenck
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Patent number: 8119235Abstract: 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: GrantFiled: July 11, 2007Date of Patent: February 21, 2012Assignee: E. I. du Pont de Nemours and CompanyInventors: Randall Allen Vogel, I-Hwa Lee, Sumita Sanjeevi Ranganathan, Lori J. Pike
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Publication number: 20110253296Abstract: 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: ApplicationFiled: June 21, 2011Publication date: October 20, 2011Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: I-Hwa Lee, Karlheinz Hausmann
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Patent number: 7968134Abstract: 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: GrantFiled: September 22, 2009Date of Patent: June 28, 2011Assignee: E.I. du Pont de Nemours and CompanyInventors: I-Hwa Lee, James Michael McKenna, Raghuram Narumanchi
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Patent number: 7964226Abstract: 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: GrantFiled: September 22, 2009Date of Patent: June 21, 2011Assignee: E.I. du Pont de Nemours and CompanyInventors: I-Hwa Lee, James Michael McKenna, Raghuram Narumanchi
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Patent number: 7964229Abstract: 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: GrantFiled: September 22, 2009Date of Patent: June 21, 2011Assignee: E.I. du Pont de Nemours and CompanyInventors: I-Hwa Lee, James Michael McKenna, Raghuram Narumanchi