Patents by Inventor Elisabeth Hebesberger

Elisabeth Hebesberger 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).

  • Sewage pipe comprising beta nucleated polypropylene material with improved properties
    Patent number: 8916250
    Abstract: Polypropylene composition comprising: a propylene homopolymer (A), a platelet-like inorganic filler (B) having optionally ?-nucleating activity and a ?-nucleating agent (C), wherein the propylene composition and/or the propylene homopolymer has (have) a polydispersity index (PI) of at least 4.0.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: December 23, 2014
    Assignee: Borealis AG
    Inventors: Klaus Bernreitner, Elisabeth Hebesberger, Franz Ruemer
  • Process for the Production of Polyolefins with Broad Molecular Weight Distribution
    Publication number: 20120136106
    Abstract: The present invention is directed to a propylene homo- or copolymer having a polydispersity index (PI), determined according ISO 6721-1, of at least 7.0 Pa?1; and a tensile modulus, determined according to ISO 527-2, of at least 1600 MPa measured on a test specimen prepared by injection molding according to ISO 1873-2. The present invention is furthermore directed to a process for the production of polyolefins in one or more reactors, wherein in at least one reactor the process comprises the following steps (c) feeding one or more (co)monomers and hydrogen to said at least one reactor, whereby the hydrogen concentration in said at least one reactor is periodically varied; (d) preparing an olefin homo- or copolymer in the presence of an olefin polymerization catalyst; (e) withdrawing the olefin homo- or copolymer from said at least one reactor whereby the following relation is fulfilled P H ? > 2.
    Type: Application
    Filed: February 4, 2010
    Publication date: May 31, 2012
    Applicant: BOREALIS AG
    Inventors: Klaus Bernreitner, Elisabeth Hebesberger, Thomas Horill, Franz Pillinger
  • Process for the Production of Polyolefins with Broad Molecular Weight Distribution
    Publication number: 20120046406
    Abstract: The present invention is directed to a propylene homo- or copolymer having a polydispersity index (PI), determined according ISO 6721-1, of at least 7.0 Pa?1; and a tensile modulus, determined according to ISO 527-2, of at least 1600 MPa measured on a test specimen prepared by injection molding according to ISO 1873-2. The present invention is furthermore directed to a process for the production of polyolefins in one or more reactors, wherein in at least one reactor the process comprises the following steps (c) feeding one or more (co)monomers and hydrogen to said at least one reactor, whereby the hydrogen concentration in said at least one reactor is periodically varied; (d) preparing an olefin homo- or copolymer in the presence of an olefin polymerization catalyst; (e) withdrawing the olefin homo- or copolymer from said at least one reactor whereby the following relation is fulfilled P H ? > 2.
    Type: Application
    Filed: February 22, 2011
    Publication date: February 23, 2012
    Applicant: BOREALIS AG
    Inventors: Klaus Bernreitner, Elisabeth Hebesberger, Thomas Horill, Franz Pillinger
  • SEWAGE PIPE MATERIAL WITH IMPROVED PROPERTIES
    Publication number: 20110200775
    Abstract: Polypropylene composition comprising: a propylene homopolymer (A), a platelet-like inorganic filler (B) having optionally ?-nucleating activity and a ?-nucleating agent (C), wherein the propylene composition and/or the propylene homopolymer has (have) a polydispersity index (PI) of at least 4.0.
    Type: Application
    Filed: September 29, 2009
    Publication date: August 18, 2011
    Applicant: Borealis AG
    Inventors: Klaus Bernreitner, Elisabeth Hebesberger, Franz Ruemer
  • PROCESS FOR THE PRODUCTION OF POLYOLEFINS WITH BROAD MOLECULAR WEIGHT DISTRIBUTION
    Publication number: 20110160373
    Abstract: The present invention is directed to a propylene homo- or copolymer having a polydispersity index (P1), determined according ISO 6721-1, of at least 7.0 Pa?1; and a tensile modulus, determined according to ISO 527-2, of at least 1600 MPa measured on a test specimen prepared by injection molding according to ISO 1873-2.
    Type: Application
    Filed: February 4, 2010
    Publication date: June 30, 2011
    Inventors: Klaus Bernreitner, Elisabeth Hebesberger, Thomas Horill, Franz Pillinger