Patents by Inventor Stefan Schiesser

Stefan Schiesser 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: 10435551
    Abstract: Injection molded article comprising at least 60 wt.-% of a heterophasic propylene copolymer, said polymer comprises a matrix being a polypropylene, said polypropylene comprises at least three polypropylene fractions, the three polypropylene fractions differ from each other by the melt flow rate and at least one of the three polypropylene fractions has a melt flow rate in the range of 1.0 to 20.0 g/10 min, and an elastomeric propylene copolymer dispersed in said matrix, wherein said heterophasic propylene copolymer has a melt flow rate of equal or more than 20.0 g/10 min and the amorphous phase of the xylene cold soluble fraction of the heterophasic propylene copolymer has an intrinsic viscosity of equal or higher than 2.0 dl/g.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: October 8, 2019
    Assignee: Borealis AG
    Inventors: Cornelia Tranninger, Stefan Schiesser, Balakantha rao Kona, Andreas Hauer
  • Patent number: 9382410
    Abstract: Fiber reinforced composition comprising a heterophasic propylene copolymer, a propylene homopolymer and/or a propylene copolymer, and fibers, wherein the propylene copolymer comprises not more than 2.0 wt.-% C2 to C10 ?-olefins other than propylene, the propylene homopolymer and the propylene copolymer have a melt flow rate MFR2 (230° C.) of at least 500 g/10 min, and the composition has a melt flow rate MFR2 (230° C.) of at least 10 g/10 min.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: July 5, 2016
    Assignee: Borealis AG
    Inventors: Klaus Bernreitner, Stefan Schiesser, Michael Tranninger, Markus Gahleitner
  • Patent number: 9139724
    Abstract: The invention pertains to a polypropylene composition consisting of: 55 to 79 wt % base polymer mix; 18 to 44.5 wt % talc; and 0.5 to 3 wt % additives based on the total weight of the polypropylene composition, the base polymer mix containing a XCU fraction and a XCS fraction and the XCU fraction being present in an amount of 91 to 98 wt % and the XCS fraction being present in an amount of 2 to 9 wt %; the base polymer mix containing a comonomer content of less than 5 wt % with respect to the base polymer mix; the talc having a d50 median particle size of 1.0 to 3.0 ?m when measured according to ISO 13317-3 15 using a Sedigraph; and the composition having a MFR (230° C./2.16 kg; ISO 1133) of 1 to 10 g/10 min. a process for the production of such a polypropylene composition and article comprising said polypropylene composition.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: September 22, 2015
    Assignee: Borealis AG
    Inventors: Rao Balakantha Kona, Stefan Schiesser, Andreas Hauer, Hansjorg Pramer
  • Publication number: 20150017366
    Abstract: Injection molded article comprising at least 60 wt.-% of a heterophasic propylene copolymer, said polymer comprises a matrix being a polypropylene, said polypropylene comprises at least three polypropylene fractions, the three polypropylene fractions differ from each other by the melt flow rate and at least one of the three polypropylene fractions has a melt flow rate in the range of 1.0 to 20.0 g/10 min, and an elastomeric propylene copolymer dispersed in said matrix, wherein said heterophasic propylene copolymer has a melt flow rate of equal or more than 20.0 g/10 min and the amorphous phase of the xylene cold soluble fraction of the heterophasic propylene copolymer has an intrinsic viscosity of equal or higher than 2.0 dl/g.
    Type: Application
    Filed: January 31, 2013
    Publication date: January 15, 2015
    Inventors: Cornelia Tranninger, Stefan Schiesser, Balakantha rao Kona, Andreas Hauer
  • Publication number: 20140371371
    Abstract: The invention pertains to a polypropylene composition consisting of: 55 to 79 wt % base polymer mix; 18 to 44.5 wt % talc; and 0.5 to 3 wt % additives based on the total weight of the polypropylene composition, the base polymer mix containing a XCU fraction and a XCS fraction and the XCU fraction being present in an amount of 91 to 98 wt % and the XCS fraction being present in an amount of 2 to 9 wt %; the base polymer mix containing a comonomer content of less than 5 wt % with respect to the base polymer mix; the talc having a d50 median particle size of 1.0 to 3.0 ?m when measured according to ISO 13317-3 15 using a Sedigraph; and the composition having a MFR (230° C./2.16 kg; ISO 1133) of 1 to 10 g/10 min a process for the production of such a polypropylene composition and article comprising said polypropylene composition.
    Type: Application
    Filed: January 16, 2013
    Publication date: December 18, 2014
    Applicant: BOREALIS AG
    Inventors: Rao Balakantha Kona, Stefan Schiesser, Andreas Hauer, Hansjorg Pramer
  • Patent number: 8461267
    Abstract: The invention relates to novel propylene polymers with improved properties especially with improved stiffness and impact strength comprising propylene homopolymers or propylene block copolymers with 90.0 to 99.9 wt % propylene and 0.1 to 10 wt % ?-olefins with 2 or 4 to 18 carbon atoms, or mixtures thereof, wherein the propylene homopolymers or propylene block copolymers are ?-nucleated propylene polymers, whereby the ?-nucleated propylene homopolymers have an Ir??0.98 and the values for tensile modulus and Charpy impact strength as specified herein. The ?-nucleated propylene block copolymers are polymers having an IR? of the propylene homopolymer block of ?0.98 and the values for tensile modulus and Charpy impact strength as also specified herein. The propylene polymers with an improved property spectrum are suitable for producing molded parts in a pipe system, such as pipes and fittings, inspection chambers, pipe ducting systems, extrusion or compression molded sheets and the like.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: June 11, 2013
    Inventors: James McGoldrick, Franz Ruemer, Stefan Schiesser, Siegfried Liedauer
  • Publication number: 20120302680
    Abstract: The invention relates to novel propylene polymers with improved properties especially with improved stiffness and impact strength comprising propylene homopolymers or propylene block copolymers with 90.0 to 99.9 wt % propylene and 0.1 to 10 wt % ?-olefins with 2 or 4 to 18 carbon atoms, or mixtures thereof, wherein the propylene homopolymers or propylene block copolymers are ?-nucleated propylene polymers, whereby the ?-nucleated propylene homopolymers have an Ir??0.98 and the values for tensile modulus and Charpy impact strength as specified herein. The ?-nucleated propylene block copolymers are polymers having an IR? of the propylene homopolymer block of ?0.98 and the values for tensile modulus and Charpy impact strength as also specified herein. The propylene polymers with an improved property spectrum are suitable for producing molded parts in a pipe system, such as pipes and fittings, inspection chambers, pipe ducting systems, extrusion or compression molded sheets and the like.
    Type: Application
    Filed: May 22, 2012
    Publication date: November 29, 2012
    Applicant: BOREALIS TECHNOLOGY OY
    Inventors: James McGoldrick, Franz Ruemer, Stefan Schiesser, Siegfried Liedauer
  • Patent number: 8283418
    Abstract: Polypropylene composition comprising a) an isotactic polypropylene (iPP) produced in the presence of a single-site catalyst and said isotactic polypropylene (iPP) has a mean isotactic block length between two structural chain defects, as a statistical average, greater than 70, and b) an atactic polypropylene (aPP) with an absorbance ratio of the absorption band at 998 cm?1 to the absorption band at 973 cm?1 [A998/A973] below 0.80 wherein the weight ratio of said atactic polypropylene to the sum of said atactic polypropylene and said isotactic polypropylene (aPP/(aPP+iPP)) is at least 0.50 wt.-%.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: October 9, 2012
    Assignee: Borealis Technology Oy
    Inventors: Werner Posch, Manfred Stadlbauer, Stefan Schiesser
  • Publication number: 20120225993
    Abstract: Fiber reinforced composition comprising a heterophasic propylene copolymer, a propylene homopolymer and/or a propylene copolymer, and fibers, wherein the propylene copolymer comprises not more than 2.0 wt.-% C2 to C10 ?-olefins other than propylene, the propylene homopolymer and the propylene copolymer have a melt flow rate MFR2 (230° C.) of at least 500 g/10 min, and the composition has a melt flow rate MFR2 (230° C.) of at least 10 g/10 min.
    Type: Application
    Filed: October 1, 2010
    Publication date: September 6, 2012
    Applicant: Borealis AG
    Inventors: Klaus Bernreitner, Stefan Schiesser, Michael Tranninger, Markus Gahleitner
  • Publication number: 20100305246
    Abstract: The invention relates to novel propylene polymers with improved properties especially with improved stiffness and impact strength comprising propylene homopolymers or propylene block copolymers with 90.0 to 99.9 wt % propylene and 0.1 to 10 wt % ?-olefins with 2 or 4 to 18 carbon atoms, or mixtures thereof, wherein the propylene homopolymers or propylene block copolymers are ?-nucleated propylene polymers, whereby the ?-nucleated propylene homopolymers have an IR??0.98, a tensile modulus ?1500 MPa at +23° C. and a Charpy impact strength, ?3 kJ/m2 at ?20° C. using notched test specimens, and the ?-nucleated propylene block copolymers are polymers having an IR? of the propylene homopolymer block of ?0.98, a tensile modulus ?1100 Mpa at +23° C. and a Charpy impact strength of ?6 kJ/m2 at ?20° C. using notched test specimens.
    Type: Application
    Filed: August 16, 2010
    Publication date: December 2, 2010
    Applicant: BOREALIS TECHNOLOGY OY
    Inventors: James MCGOLDRICK, Franz RUEMER, Stefan SCHIESSER, Siegfried LIEDAUER
  • Publication number: 20090318621
    Abstract: Polypropylene composition comprising a) an isotactic polypropylene (iPP) produced in the presence of a single-site catalyst and said isotactic polypropylene (iPP) has a mean isotactic block length between two structural chain defects, as a statistical average, greater than 70, and b) an atactic polypropylene (aPP) with an absorbance ratio of the absorption band at 998 cm?1 to the absorption band at 973 cm?1 [A998/A973] below 0.80 wherein the weight ratio of said atactic polypropylene to the sum of said atactic polypropylene and said isotactic polypropylene (aPP/(aPP+iPP)) is at least 0.50 wt.-%.
    Type: Application
    Filed: January 18, 2008
    Publication date: December 24, 2009
    Inventors: Werner Posch, Manfred Stadlbauer, Stefan Schiesser
  • Patent number: 7585911
    Abstract: Inner liners of foam insulated refrigerators and freezers are made of mineral filled bimodal polyethylene.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: September 8, 2009
    Assignee: Borealis Technology Oy
    Inventors: Werner Posch, Stefan Schiesser, Ole Jan Myhre
  • Publication number: 20080146714
    Abstract: Inner liners of foam insulated refrigerators and freezers are made of mineral filled bimodal polyethylene.
    Type: Application
    Filed: December 20, 2005
    Publication date: June 19, 2008
    Inventors: Werner Posch, Stefan Schiesser, Ole Jan Myhre
  • Publication number: 20040158002
    Abstract: The invention relates to novel propylene polymers with improved properties especially with improved stiffness and impact strength comprising propylene homopolymers or propylene block copolymers with 90.0 to 99.9 wt % propylene and 0.1 to 10 wt % &agr;-olefins with 2 or 4 to 18 carbon atoms, or mixtures thereof, wherein the propylene homopolymers or propylene block copolymers are &bgr;-nucleated propylene polymers, whereby the &bgr;-nucleated propylene homopolymers have an IR&tgr;≧0.98, a tensile modulus ≧1500 MPa at +23° C. and a Charpy impact strength, ≧3 kJ/m2 at −20° C. using notched test specimens, and the &bgr;-nucleated propylene block copolymers are polymers having an IR&tgr; of the propylene homopolymer block of ≧0.98, a tensile modulus ≧1100 Mpa at +23° C. and a Charpy impact strength of ≧6 kJ/m2 at −20° C. using notched test specimens.
    Type: Application
    Filed: February 25, 2004
    Publication date: August 12, 2004
    Inventors: James McGoldrick, Franz Ruemer, Stefan Schiesser, Siegfried Liedauer
  • Patent number: 6433087
    Abstract: The invention relates to a high resistance polypropylene tube especially with a high modulus of elasticity in extension, high impact strength, annular rigidity and resistance towards knocks. The inventive tube is made of polypropylene and has a modulus of elasticity in extension of 1300-2300 N/mm2 and an impact strength of 60-110 kJ/m2. The inventive tube is produced by extrusion of a plastic moulding material consisting of two constituents A and B of composition A) 80-98 mass parts of an isotactic polypropylene homopolymer as a coherent matrix constituent with a decade regularity of >95% and B) 2-20 mass parts of a copolymer, consisting of 50-70 mass parts of propylene and 30-50 mass parts of ethylene and/or other C4-C8-&agr;-olefins as a dispersedly distributed elastomer component. The intrinsic viscosity ratio of both components B/A is 0.9-1.5 and the melt flow index of the moulding material is 0.15-0.8 g/10 min.
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: August 13, 2002
    Assignee: Borealis GmbH
    Inventors: Karl Ebner, Roland Konrad, Stefan Schiesser, Klaus Bernreitner