Patents by Inventor Wolfgang Neissl

Wolfgang Neissl 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: 9512246
    Abstract: A process for the preparation of a polypropylene in a sequential polymerization process including a pre-polymerization reactor and at least two polymerization reactors connected in series. The polymerization in the at least two polymerization reactors takes place in the presence of a Ziegler-Natta catalyst. The Ziegler-Natta catalyst includes (a) a pro-catalyst that has a compound of a transition metal, a compound of a metal which metal is selected from one of the groups 1 to 3 of the periodic table (IUPAC), and an internal electron donor, (b) a co-catalyst, and (c) an external donor. The Ziegler-Natta catalyst is present in the pre-polymerization reactor. Ethylene and propylene are fed to the pre-polymerization reactor in a feed rate ratio of 0.5 to 10.0 g/kg.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: December 6, 2016
    Assignee: Borealis AG
    Inventors: Wolfgang Neissl, Dietrich Gloger, Thomas Horill, Martina Sandholzer, Gregory Potter
  • Patent number: 9487634
    Abstract: The present invention relates to a new biaxially oriented polypropylene (BOPP) film, a process for the preparation of such film as well as the use of a polypropylene for the preparation of such film and an article comprising such film.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: November 8, 2016
    Assignee: Borealis AG
    Inventors: Wolfgang Neissl, Dietrich Gloger, Gregory Potter, Davide Tranchida
  • Patent number: 9353203
    Abstract: A process for the preparation of a polypropylene in a sequential polymerization process including at least two polymerization reactors connected in series. The polymerization takes place in the presence of a Ziegler-Natta catalyst, and said Ziegler-Natta catalyst includes (a) a pro-catalyst that has a compound of a transition metal, a compound of a metal which metal is selected from one of the groups 1 to 3 of the periodic table (IUPAC), and an internal electron donor, (b) a co-catalyst, and (c) an external donor. The ratio of catalyst feed rate to propylene feed rate in the first polymerization reactor is 1.0 to 4.5 g/t.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: May 31, 2016
    Assignee: Borealis AG
    Inventors: Wolfgang Neissl, Dietrich Gloger, Thomas Horill, Martina Sandholzer, Gregory Potter
  • Publication number: 20150267014
    Abstract: The present invention relates to a new biaxially oriented polypropylene (BOPP) film, a process for the preparation of such film as well as the use of a polypropylene for the preparation of such film and an article comprising such film.
    Type: Application
    Filed: November 6, 2013
    Publication date: September 24, 2015
    Applicant: Borealis AG
    Inventors: Wolfgang Neissl, Dietrich Gloger, Gregory Potter, Davide Tranchida
  • Publication number: 20150191556
    Abstract: A process for the preparation of a polypropylene in a sequential polymerization process including a pre-polymerization reactor and at least two polymerization reactors connected in series. The polymerization in the at least two polymerization reactors takes place in the presence of a Ziegler-Natta catalyst. The Ziegler-Natta catalyst includes (a) a pro-catalyst that has a compound of a transition metal, a compound of a metal which metal is selected from one of the groups 1 to 3 of the periodic table (IUPAC), and an internal electron donor, (b) a co-catalyst, and (c) an external donor. The Ziegler-Natta catalyst is present in the pre-polymerization reactor. Ethylene and propylene are fed to the pre-polymerization reactor in a feed rate ratio of 0.5 to 10.0 g/kg.
    Type: Application
    Filed: July 30, 2013
    Publication date: July 9, 2015
    Inventors: Wolfgang Neissl, Dietrich Gloger, Thomas Horill, Martina Sandholzer, Gregory Potter
  • Publication number: 20150152203
    Abstract: A process for the preparation of a polypropylene in a sequential polymerization process including at least two polymerization reactors connected in series. The polymerization takes place in the presence of a Ziegler-Natta catalyst, and said Ziegler-Natta catalyst includes (a) a pro-catalyst that has a compound of a transition metal, a compound of a metal which metal is selected from one of the groups 1 to 3 of the periodic table (IUPAC), and an internal electron donor, (b) a co-catalyst, and (c) an external donor. The ratio of catalyst feed rate to propylene feed rate in the first polymerization reactor is 1.0 to 4.5 q/t.
    Type: Application
    Filed: July 30, 2013
    Publication date: June 4, 2015
    Inventors: Wolfgang Neissl, Dietrich Gloger, Thomas Horill, Martina Sandholzer, Gregory Potter
  • Patent number: 6165928
    Abstract: Procedure for the preparation of a solid catalyst component which is active in the polymerization of olefins, comprising the steps:a) contacting a dehydrated silica support with a solution of Mg-halide or Mg-alkyl-halide or a mixture of both, optionally in the presence of and Ti-alkoxyde or Ti-halogen-alkoxyde or a mixture of both,b) contacting the catalyst-precursor obtained in (a) with Mg-alkyl or Mg-alkyl-halide or a mixture of both, optionally in presence of electron-donors (Lewis bases),c) halogenating the catalyst-precursor obtained in (b) by contact of said activated support with halogenating agents,d) titanating the catalyst-precursor obtained in (c) with Ti-tetrahalide in the presence of electron-donors,e) recovering the solid catalyst-component from the reaction products of step (d).The catalyst component, which is obtained according to the above procedure, may also be used together with Al-trialkyl or Al-alkyl-halides and a Lewis base, as a catalyst for the polymerization of olefins.
    Type: Grant
    Filed: December 2, 1996
    Date of Patent: December 26, 2000
    Assignee: Borealis G.m.b.H.
    Inventors: Luciano Luciani, Wolfgang Neissl, Birgit Wenidoppler
  • Patent number: 6103655
    Abstract: Procedure for the preparation of a solid carrier for olefin polymerization catalysts, comprising the steps:a) impregnating a silica with Mg-chloride solubilized in ethylbenzoate, in the presence of further electron donors,b) optionally drying the impregnated silica obtained in (a) and impregnating it with a solution of Mg-alkyls in SiCl.sub.4 at a temperature from -10 to 20.degree. C. and subsequently treating the obtained slurry at a temperature from 40.degree. C. to reflux temperature, optionally adding a further amount of electron donors,c) drying the obtained carrier.The carrier which is obtained according to the above procedure is advantageously used for the preparation of supported catalysts for the polymerization of olefins.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: August 15, 2000
    Assignee: Borealis GmbH
    Inventors: Luciano Luciani, Wolfgang Neissl, Norbert Hafner
  • Patent number: 6096681
    Abstract: Procedure for the preparation of a solid carrier for olefin polymerization catalysts, comprising the steps:a) impregnating a silica with a solution of Mg-chloride in the presence of electron donors,b) drying the impregnated silica obtained in (a) and impregnating it with a solution of Mg-alkyls in SiCl.sub.4 at a temperature from -10 to 20.degree. C., optionally adding a further amount of electron donors,c) subsequently treating the slurry obtained in (b) at a temperature from 40.degree. C. to reflux temperature,d) drying the carrier obtained in (c).
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: August 1, 2000
    Assignee: Borealis GmbH
    Inventors: Luciano Luciani, Wolfgang Neissl, Norbert Hafner
  • Patent number: 6069108
    Abstract: Process for preparing a supported metallocene catalyst, in which a hydrophilic, macroporous, finely divided aluminum oxide, silicon oxide, titanium oxide or zirconium oxide or a mixture or mixed oxide thereof is dried at from 110 to 800.degree. C., then reacted with an aluminoxane and subsequently with polyfunctional organic crosslinkers. In a further step, the catalyst support can be mixed with a reaction product of metallocenes and activators, giving a supported metallocene catalyst which is used, in particular, for the polymerization of olefins.
    Type: Grant
    Filed: March 4, 1999
    Date of Patent: May 30, 2000
    Assignee: Borealis GmbH
    Inventors: Eberhard Ernst, Jens Reussner, Wolfgang Neissl
  • Patent number: 6028149
    Abstract: Procedure for the preparation of a solid catalyst component which is active in the polymerization of olefins, comprising the steps:a) contacting a silylated silica support with a solution of Mg-halide or Mg-alkyl-halide or a mixture of both and Ti-alkoxide or Ti-halogen-alkoxide or a mixture of both, optionally in the presence of Ti-tetrahalide,b) contacting the catalyst-precursor obtained in (a) with Mg-alkyl or Mg-alkyl-halide or a mixture of both, optionally in presence of Lewis base,c) halogenating the catalyst-precursor obtained in (b) by contact of said activated support with halogenating agents,d) titanating the catalyst-precursor obtained in (c) with Ti-tetrahalide in the presence of electron-donors,e) recovering the solid catalyst-component from the reaction products of step (d).The catalyst component, which is obtained according to the above procedure, may also be used together with Al-trialkyl or Al-alkyl-halides and a Lewis base, as a catalyst for the polymerization of olefins.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: February 22, 2000
    Assignee: PCD Polymere Gesellschaft m.b.H.
    Inventors: Luciano Luciani, Wolfgang Neissl, Birgit Wenidoppler
  • Patent number: 5910463
    Abstract: Process for preparing a catalyst support, in which a hydrophilic, macroporous, finely divided aluminum oxide, silicon oxide, titanium oxide or zirconium oxide or a mixture or mixed oxide thereof is dried at from 110 to 800.degree. C., then reacted with an aluminoxane and subsequently with polyfunctional organic crosslinkers. In a further step, the catalyst support can be mixed with a reaction product of metallocenes and activators, giving a supported metallocene catalyst which is used, in particular, for the polymerization of olefins.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: June 8, 1999
    Assignee: Borealis AG
    Inventors: Eberhard Ernst, Jens Reussner, Wolfgang Neissl
  • Patent number: 5739224
    Abstract: Procedure for the preparation of a solid catalyst component which is active in the polymerization of olefins, comprising the steps:a) contacting a silylated silica support with a solution of Mg-halide or Mg-alkyl-halide or a mixture of both,b) contacting the catalyst-precursor obtained in (a) with Mg-alkyl or Mg-alkyl-halide or a mixture of both, optionally in presence of electron-donors (Lewis bases),c) halogenating the catalyst-precursor obtained in (b) by contact of said activated support with halogenating agents,d) titanating the catalyst-precursor obtained in (c) with Ti-tetrahalide in the presence of electron-donors,e) recovering the solid catalyst-component from the reaction products of step (d).The catalyst component, which is obtained according to the above procedure, may also be used together with Al-trialkyl or Al-alkyl-halides and a Lewis base, as a catalyst for the polymerization of olefins.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: April 14, 1998
    Assignee: PCD Polymere Gesellschaft m.b.H.
    Inventors: Luciano Luciani, Wolfgang Neissl, Birgit Wenidoppler
  • Patent number: 5705568
    Abstract: New polypropylenes which are obtained by chemical degradation of elastic polypropylenes using organic peroxides.
    Type: Grant
    Filed: July 24, 1996
    Date of Patent: January 6, 1998
    Assignee: PCD Polymere Gesellschaft m.b.H.
    Inventors: Markus Gahleitner, Klaus Bernreitner, Norbert Hafner, Rudolf Wolfer, Wolfgang Neissl
  • Patent number: 5629255
    Abstract: Highly active catalysts, for olefin polymerization, from tetraneophylzirconium and partly hydroxylated metal oxides from group IIa, IIIa, IVa or IVb of the Periodic Table, which are essentially free from by-products.
    Type: Grant
    Filed: September 21, 1995
    Date of Patent: May 13, 1997
    Assignee: PCD Polymere Gesellschaft m.b.H.
    Inventors: Norbert Hafner, Wilfried T oltsch, Hans Ledwinka, Wolfgang Neissl
  • Patent number: 5521265
    Abstract: Metallocenes of the formula ##STR1## where M is a metal selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta or an element selected from the group of the lanthanides, X.sub.1 and X.sub.2 are each an alkyl, alkoxy, aryl, aryloxy, alkenyl, arylalkyl, alkylaryl or arylalkenyl group, hydrogen or halogen and L.sub.1 and L.sub.2 are each a hydrocarbon which can form a sandwich structure with M, where at least L.sub.1 or L.sub.2 is substituted by or condensed with a ferrocene or ruthenocene radical. R.sub.1 is C, Si, Ge or Sn or the whole bridge A(R.sub.1).sub.n B is a biphenylene radical which is unsubstituted or substituted by A and/or B, A and B have the meanings of X.sub.1 and X.sub.2, n is an integer from 0 to 4.
    Type: Grant
    Filed: March 22, 1995
    Date of Patent: May 28, 1996
    Assignee: PCD Polymere Gesellschaft m.b.H.
    Inventors: Herwig Schottenberger, Michael Buchmeiser, Olaf Elsner, Eberhard Ernst, Jens Reussner, Wolfgang Neissl, Herbert Angleitner