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: 9512246Abstract: 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: GrantFiled: July 30, 2013Date of Patent: December 6, 2016Assignee: Borealis AGInventors: Wolfgang Neissl, Dietrich Gloger, Thomas Horill, Martina Sandholzer, Gregory Potter
-
Patent number: 9487634Abstract: 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: GrantFiled: November 6, 2013Date of Patent: November 8, 2016Assignee: Borealis AGInventors: Wolfgang Neissl, Dietrich Gloger, Gregory Potter, Davide Tranchida
-
Patent number: 9353203Abstract: 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: GrantFiled: July 30, 2013Date of Patent: May 31, 2016Assignee: Borealis AGInventors: Wolfgang Neissl, Dietrich Gloger, Thomas Horill, Martina Sandholzer, Gregory Potter
-
Publication number: 20150267014Abstract: 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: ApplicationFiled: November 6, 2013Publication date: September 24, 2015Applicant: Borealis AGInventors: Wolfgang Neissl, Dietrich Gloger, Gregory Potter, Davide Tranchida
-
Publication number: 20150191556Abstract: 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: ApplicationFiled: July 30, 2013Publication date: July 9, 2015Inventors: Wolfgang Neissl, Dietrich Gloger, Thomas Horill, Martina Sandholzer, Gregory Potter
-
Publication number: 20150152203Abstract: 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: ApplicationFiled: July 30, 2013Publication date: June 4, 2015Inventors: Wolfgang Neissl, Dietrich Gloger, Thomas Horill, Martina Sandholzer, Gregory Potter
-
Patent number: 6165928Abstract: 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: GrantFiled: December 2, 1996Date of Patent: December 26, 2000Assignee: Borealis G.m.b.H.Inventors: Luciano Luciani, Wolfgang Neissl, Birgit Wenidoppler
-
Patent number: 6103655Abstract: 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: GrantFiled: February 13, 1998Date of Patent: August 15, 2000Assignee: Borealis GmbHInventors: Luciano Luciani, Wolfgang Neissl, Norbert Hafner
-
Patent number: 6096681Abstract: 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: GrantFiled: February 13, 1998Date of Patent: August 1, 2000Assignee: Borealis GmbHInventors: Luciano Luciani, Wolfgang Neissl, Norbert Hafner
-
Patent number: 6069108Abstract: 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: GrantFiled: March 4, 1999Date of Patent: May 30, 2000Assignee: Borealis GmbHInventors: Eberhard Ernst, Jens Reussner, Wolfgang Neissl
-
Patent number: 6028149Abstract: 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: GrantFiled: September 30, 1996Date of Patent: February 22, 2000Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Luciano Luciani, Wolfgang Neissl, Birgit Wenidoppler
-
Patent number: 5910463Abstract: 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: GrantFiled: July 14, 1997Date of Patent: June 8, 1999Assignee: Borealis AGInventors: Eberhard Ernst, Jens Reussner, Wolfgang Neissl
-
Patent number: 5739224Abstract: 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: GrantFiled: November 8, 1996Date of Patent: April 14, 1998Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Luciano Luciani, Wolfgang Neissl, Birgit Wenidoppler
-
Patent number: 5705568Abstract: New polypropylenes which are obtained by chemical degradation of elastic polypropylenes using organic peroxides.Type: GrantFiled: July 24, 1996Date of Patent: January 6, 1998Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Markus Gahleitner, Klaus Bernreitner, Norbert Hafner, Rudolf Wolfer, Wolfgang Neissl
-
Highly active catalysts for olefin polymerization and a polymerization process using these catalysts
Patent number: 5629255Abstract: 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: GrantFiled: September 21, 1995Date of Patent: May 13, 1997Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Norbert Hafner, Wilfried T oltsch, Hans Ledwinka, Wolfgang Neissl -
Patent number: 5521265Abstract: 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: GrantFiled: March 22, 1995Date of Patent: May 28, 1996Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Herwig Schottenberger, Michael Buchmeiser, Olaf Elsner, Eberhard Ernst, Jens Reussner, Wolfgang Neissl, Herbert Angleitner