Patents by Inventor Stefan B. Ohlsson

Stefan B. Ohlsson 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: 11718719
    Abstract: Provided are oriented films comprising linear low density polyethylene polymer and having improved balance of properties including improved machine direction tear strength. The oriented polymer film has at least one layer comprising 50 to 100 wt. % of an ethylene-based polymer. The MDO polymer film has a normalized MD Elmendorf Tear (ASTM D-1922) of at least 40 g/?m. In certain embodiments, the MDO polymer film surprisingly does not tear when MD Elmendorf Tear is measured according to ASTM D-1922.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: August 8, 2023
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Etienne R. H. Lernoux, Giriprasath Gururajan, Donald A. Winesett, Stefan B. Ohlsson
  • Patent number: 11383483
    Abstract: Multilayer foam films including a core layer and two skin layers, (i) the core layer including the product of the combination of an LDPE composition, at least one blend partner and at least one foaming agent; and (ii) the two skin layers each independently including the product of the combination of an ethylene 1-hexene copolymer and at least one additive; wherein the core layer is disposed between the two skin layers, are provided. Methods for making the multilayer foam films are also provided.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: July 12, 2022
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Qi Tang, Stefan B. Ohlsson
  • Publication number: 20220025143
    Abstract: The present disclosure relates to compositions including copolymers, and methods for making compositions. In an embodiment, a composition includes the product of a copolymer comprising at least 50 mol % propylene and at least 1 wt % of at least one of ethylene or a C4 to C10 ?-olefin, based on the total weight of the copolymer; and an organic peroxide. The copolymer has MwMALLS/MnMALLS of from 1 to 5. In an embodiment, a process to form a composition includes introducing a copolymer with an organic peroxide, the copolymer comprising at least 50 mol % propylene and at least 1 wt % of at least one of ethylene or a C4 to C10 ?-olefin, based on the total weight of the copolymer; and obtaining a composition comprising a product of the copolymer and the organic peroxide. The copolymer has MwMALLS/MnMALLS of from 1 to 5.
    Type: Application
    Filed: September 6, 2019
    Publication date: January 27, 2022
    Inventors: Sasha P. Schmitt, George J. Pehlert, Stefan B. Ohlsson, Willy J.J. Leysen
  • Publication number: 20220017730
    Abstract: The present disclosure provides polyolefin compositions and films and method for producing such films. The polyolefin composition contains about 40 wt % to about 95 wt % of a BOCD polyethylene and about 10 wt % to about 60 wt % of a polypropylene, by weight of the polyolefin composition. The polyolefin composition has a 1% secant flexural modulus MID of greater than 250 MPa and a 1% secant flexural modulus TD of greater than 300 MPa, as determined for a layer of the polyolefin composition having a thickness of about 50 ?m and a Dart Impact (Method A) of greater than 15 g/?m and an Elmendorf tear MI) of greater than 7 g/?m, as determined for a film containing the polyolefin composition and having a thickness of about 90 ?m.
    Type: Application
    Filed: November 11, 2019
    Publication date: January 20, 2022
    Inventors: Sushanta DHAR ROY, Bradley A. KRAMER, Ying ZOU, Jasper HOLSBEEK, Stefan B. OHLSSON, Maciej M. PASNIEWSKI, Mosha H. ZHAO
  • Patent number: 11104783
    Abstract: A process to prepare a polypropylene, and the polypropylene and films therefrom, comprising combining a high melt strength polypropylene comprising at least 50 mol % propylene, and having a molecular weight distribution (Mw/Mn) greater than 6, a branching index (g?vis) of at least 0.95, and a melt strength of at least 20 cN determined using an extensional rheometer at 190° C., and within the range from 20 to 1000 ppm of a long half-life organic peroxide, and isolating the polypropylene, wherein the polypropylene thus formed has a molecular weight distribution (Mw/Mn) within a range of from 7 to 22, a z-average molecular weight of less than 1,600,000 g/mole, a branching index (g?vis) of at least 0.95; and a melt strength less than 20 cN.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: August 31, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: George J. Pehlert, Stefan B. Ohlsson, Edward F. Allen, Jr., Juliet B. Wagner, Edward Y. Bylina
  • Publication number: 20210260849
    Abstract: Multilayer foam films including a core layer and two skin layers, (i) the core layer including the product of the combination of an LDPE composition, at least one blend partner and at least one foaming agent; and (ii) the two skin layers each independently including the product of the combination of an ethylene 1-hexene copolymer and at least one additive; wherein the core layer is disposed between the two skin layers, are provided. Methods for making the multilayer foam films are also provided.
    Type: Application
    Filed: July 9, 2019
    Publication date: August 26, 2021
    Inventors: Qi TANG, Stefan B. OHLSSON
  • Patent number: 10875267
    Abstract: Methods and systems for making a film made of dynamically vulcanized thermoplastic elastomeric material are provided herein. The subject methods and systems achieve dimensional stability of an elastic film by applying thermal treatment as part of the film making process and enhance the shrinkage of the film by intentionally with stretching the film while hot and freezing the film in the stretch. The systems and methods are useful in controlling shrinkage of DVA post film extrusion.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: December 29, 2020
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Anna C. Claerbout, Peter W. Manders, Stefan B. Ohlsson, Willy J. J. Leysen
  • Publication number: 20200369841
    Abstract: Provided are oriented films comprising linear low density polyethylene polymer and having improved balance of properties including improved machine direction tear strength. The oriented polymer film has at least one layer comprising 50 to 100 wt. % of an ethylene-based polymer. The MDO polymer film has a normalized MD Elmendorf Tear (ASTM D-1922) of at least 40 g/?m. In certain embodiments, the MDO polymer film surprisingly does not tear when MD Elmendorf Tear is measured according to ASTM D-1922.
    Type: Application
    Filed: October 4, 2017
    Publication date: November 26, 2020
    Inventors: Etienne R.H. Lernoux, Giriprasath Gururajan, Donald A. Winesett, Stefan B. Ohlsson
  • Patent number: 10787564
    Abstract: Described is a polyethylene composition comprising at least one polyethylene having a crystallinity of less than 60, or 55, or 50% and within a range from 0.2 wt % to 15 wt % of cyclic-olefin copolymer and within a range from 0.2 wt % to 15 wt % of hydrocarbon resin, by weight of the polyethylene composition. The polyethylene compositions can be formed into useful articles such as films and injection molded and thermoformed articles.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: September 29, 2020
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Gregory K. Hall, Stefan B. Ohlsson, Yong Yang
  • Patent number: 10752740
    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, and a branching index (g?) of at least 0.95.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: August 25, 2020
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Saifudin M. Abubakar, Prasadarao Meka, Stefan B. Ohlsson
  • Publication number: 20190322088
    Abstract: Disclosed are multilayer films which can provide desired film performance and balanced overall performance suited for various applications.
    Type: Application
    Filed: November 28, 2017
    Publication date: October 24, 2019
    Inventors: Zhen-Yu Zhu, Xiao-Chuan Wang, Stefan B. Ohlsson, Achiel J.M. Van Loon, Xin Y. Zhang, Michael Martin-Gatius
  • Publication number: 20190211192
    Abstract: Described is a polyethylene composition comprising at least one polyethylene having a crystallinity of less than 60, or 55, or 50% and within a range from 0.2 wt % to 15 wt % of cyclic-olefin copolymer and within a range from 0.2 wt % to 15 wt % of hydrocarbon resin, by weight of the polyethylene composition. The polyethylene compositions can be formed into useful articles such as films and injection molded and thermoformed articles.
    Type: Application
    Filed: December 4, 2018
    Publication date: July 11, 2019
    Inventors: Gregory K. Hall, Stefan B. Ohlsson, Yong Yang
  • Publication number: 20180354210
    Abstract: Methods and systems for making a film made of dynamically vulcanized thermoplastic elastomeric material are provided herein. The subject methods and systems achieve dimensional stability of an elastic film by applying thermal treatment as part of the film making process and enhance the shrinkage of the film by intentionally with stretching the film while hot and freezing the film in the stretch. The systems and methods are useful in controlling shrinkage of DVA post film extrusion.
    Type: Application
    Filed: April 24, 2018
    Publication date: December 13, 2018
    Inventors: Anna C. Claerbout, Peter W. Manders, Stefan B. Ohlsson, Willy J.J. Leysen
  • Publication number: 20180319964
    Abstract: Shrink films made from metallocene-catalyzed polyethylene polymers and processes for making the same are disclosed.
    Type: Application
    Filed: December 20, 2016
    Publication date: November 8, 2018
    Inventors: Stefan B. OHLSSON, Wen LI, Etienne R.H. LERNOUX, Jianya CHENG, Xiao-Chuan WANG
  • Publication number: 20180298173
    Abstract: A process to prepare a polypropylene, and the polypropylene and films therefrom, comprising combining a high melt strength polypropylene comprising at least 50 mol % propylene, and having a molecular weight distribution (Mw/Mn) greater than 6, a branching index (g?vis) of at least 0.95, and a melt strength of at least 20 cN determined using an extensional rheometer at 190° C., and within the range from 20 to 1000 ppm of a long half-life organic peroxide, and isolating the polypropylene, wherein the polypropylene thus formed has a molecular weight distribution (Mw/Mn) within a range of from 7 to 22, a z-average molecular weight of less than 1,600,000 g/mole, a branching index (g?vis) of at least 0.95; and a melt strength less than 20 cN.
    Type: Application
    Filed: September 16, 2016
    Publication date: October 18, 2018
    Inventors: George J. Pehlert, Stefan B. Ohlsson, Edward F. Allen, JR., Juliet B. Wagner, Edward Y. Bylina
  • 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: 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
  • Patent number: 9126269
    Abstract: A multilayer blown film with improved strength or toughness comprising a layer comprising a metallocene polyethylene (mPE) having a high melt index ratio (MIR), a layer comprising an mPE having a low MIR, and a layer comprising a HDPE, and/or LDPE. Other embodiments have skin layers and a plurality of sublayers. At least one sublayer includes an mPE, and at least one additional sublayer includes HDPE and/or LDPE. The mPE has a density from about 0.910 to about 0.945 g/cm3, MI from about 0.1 to about 15, and melt index ratio (MIR) from about 15 to 25 (low-MIR mPE) and/or from greater than 25 to about 80 (high-MIR mPE). A process is related to supplying respective melt streams for coextrusion at a multilayer die to form a blown film having the inner and outer skin layers and a plurality of sublayers, wherein the skin layers and at least one of the sublayers comprise mPE and at least one of the sublayers comprise HDPE, LDPE or both.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: September 8, 2015
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Stefan B. Ohlsson, Dirk J. Permentier, Michael J. Vinck
  • Publication number: 20140248480
    Abstract: Disclosed herein is a film having an outer layer A in surface contact with a core layer, wherein the outer layer A includes a plastomer, and wherein the outer layer A contains no more than 0.1 wt. % of a C4-C10-based polymer having an Mw<about 5.00×104 g/mol. A method of controlling the peel cling force of a multilayer blown film, a method to produce a multilayer blown film, a method of wrapping an article, a method of reducing the noise associated with wrapping an article, a roll of stretch wrap film, and a multilayer blown surface protection film are also disclosed.
    Type: Application
    Filed: October 23, 2012
    Publication date: September 4, 2014
    Inventors: Michael J. Vinck, Anne-Marie L. Joly, Mario Bastiaens, Petra DeWael, Stefan B. Ohlsson
  • Patent number: 8715813
    Abstract: A high clarity, high throughput film comprising at least two skin layers and at least one core layer there between, wherein the skin layers comprise at least one linear ethylene-?-olefin copolymer having an I21/I2 of greater than 20; a density within the range from 0.910 to 0.945 g/cm3 and CDBI of less than 40; and the core layer comprises at least one polyethylene having an overall density of at least 0.910 g/cm3; wherein the film has a dart impact (ASTM D1709) of greater than 10 g/?m and a Haze (ASTM D1003 method B) of less than 10%.
    Type: Grant
    Filed: October 23, 2008
    Date of Patent: May 6, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Danny Van Hoyweghen, Stefan B. Ohlsson