Patents by Inventor Volker Dolle

Volker Dolle 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: 5672668
    Abstract: A process for the preparation of an olefin polymer by polymerization or copolymerization of an olefin of the formula R.sup.a --CH.dbd.CH--R.sup.b, in which R.sup.a and R.sup.b are identical or different and are a hydrogen atom or a hydrocarbon radical having 1 to 14 carbon atoms, or R.sup.a and R.sup.b, together with the atoms connecting them, can form a ring, at a temperature of from -60.degree. to 200.degree. C., at a pressure of from 0.5 to 100 bar, in solution, in suspension or in the gas phase, in the presence of a catalyst formed from a metallocene in the meso-form or a meso:rac mixture, with meso:rac>1:99, as transition-metal compound and a cocatalyst, wherein the metallocene is a compound of the formula I, ##STR1## in which M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are identical or different and are methyl or chlorine, R.sup.3 and R.sup.6 are identical or different and are methyl, isopropyl, phenyl, ethyl or trifluoromethyl, R.sup.4 and R.sup.5 are hydrogen or as defined for R.sup.3 and R.sup.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: September 30, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Andreas Winter, Martin Antberg, Bernd Bachmann, Volker Dolle, Frank Kuber, Jurgen Rohrmann, Walter Spaleck
  • Patent number: 5663268
    Abstract: A syndiotactic propylene copolymer is obtained in high yields by copolymerization of propylene with small amounts of other olefins in the presence of a catalyst comprising a metallocene of the formula I ##STR1## in which M.sup.1 is titanium, zirconium, hafnium, vanadium, niobium or tantalum and an aluminoxane. This copolymer has a very high molecular weight, a very narrow molecular weight distribution, very high syndiotaxicity, advantageously low melting points and rubber-like behavior. Molded articles produced from the polymer are distinguished by high transparency, flexibility and tear strength. Their main areas of application are packagings of any type.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 2, 1997
    Assignee: Hoechst
    Inventors: Andreas Winter, Volker Dolle, Jurgen Rohrmann, Walter Spaleck, Martin Antberg
  • Patent number: 5627245
    Abstract: A syndiotactic propylene copolymer is obtained in high yields by copolymerization of propylene with small amounts of other olefins in the presence of a catalyst comprising a metallocene of the formula I ##STR1## in which M.sup.1 is titanium, zirconium, hafnium, vanadium, niobium or tantalum and an aluminoxane. This copolymer has a very high molecular weight, a very narrow molecular weight distribution, very high syndiotaxicity, advantageously low melting points and rubber-like behavior. Molded articles produced from the polymer are distinguished by high transparency, flexibility and tear strength. Their main areas of application are packagings of any type.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: May 6, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Andreas Winter, Volker Dolle, J urgen Rohrmann, Walter Spaleck, Martin Antberg
  • Patent number: 5587501
    Abstract: Syndiotactic polyolefins having a molecular weight distribution M.sub.w /M.sub.n of >3 and which may be monomodal, bimodal or multimodal are obtained by polymerization or copolymerization of olefins of the formula RCH.dbd.CHR, in which a catalyst system comprising an aluminoxane and a transition-metal component (metallocene) is used, the transition-metal component comprising at least 2 metallocenes of the formula ##STR1## which are stereorigid and whose moiety formed by Zr and the substituents R.sup.1 -R.sup.4 has C.sub.s symmetry or slightly distorted C.sub.s symmetry.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 24, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Andreas Winter, Volker Dolle, Walter Spaleck
  • Patent number: 5539066
    Abstract: Syndiotactic polyolefins having a molecular weight distribution M.sub.w /M.sub.n of .gtoreq.3 and which may be monomodal, bimodal or multimodal are obtained by polymerization or copolymerization of olefins of the formula RCH.dbd.CHR, in which a catalyst system comprising an aluminoxane and a transition-metal component (metallocene) is used, the transition-metal component comprising at least 2 metallocenes of the formula ##STR1## which are stereorigid and whose moiety formed by Zr and the substituents R.sup.1 -R.sup.4 has C.sub.s symmetry or slightly distorted C.sub.s symmetry.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: July 23, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Andreas Winter, Volker Dolle, Walter Spaleck
  • Patent number: 5455366
    Abstract: Metallocenes having benzo-fused indenyl derivatives as ligands, processes for their preparation and their use as catalysts A very effective catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are halogen or alkyl, R.sup.3 is alkyl, R.sup.4 to R.sup.10 are alkyl or hydrogen and R.sup.11 is a (substituted) alkylene or heteroatom bridge.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: October 3, 1995
    Assignee: Hoechst AG
    Inventors: Jurgen Rohrmann, Volker Dolle, Andreas Winter, Frank Kuber
  • Patent number: 5455365
    Abstract: Process for the preparation of an olefin polymer using metallocenes containing specifically substituted indenyl ligandsA highly effective catalyst system for the polymerization of olefins comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## in which, preferably M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.5 is hydrogen or alkyl, R.sup.3 and R.sup.4 are alkyl, where R.sup.3, R.sup.4 and R.sup.5 may be halogenated, --(CR.sup.7 R.sup.8).sub.m --R.sup.6 --(CR.sup.7 R.sup.8).sub.n -- is a single- or multi-membered chain in which R.sup.6 may also be a (substituted) heteroatom, and m+n is zero or 1.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: October 3, 1995
    Assignee: Hoechst AG
    Inventors: Andreas Winter, Frank Kueber, Walter Spaleck, Herbert Riepl, Wolfgang A. Herrmann, Volker Dolle, Juergen Rohrmann
  • Patent number: 5374752
    Abstract: A very active catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 is hydrogen, R.sup.4 to R.sup.6 and alkyl or aryl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n is a single- or multi-membered chain, in which R' can also be a (substituted) hetero atom, and m+n is zero or 1.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: December 20, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Andreas Winter, Jurgen Rohrmann, Volker Dolle, Frank Kuber
  • Patent number: 5350817
    Abstract: Polyolefins having a molecular weight distribution M.sub.w /M.sub.n of .gtoreq.3 and which may be monomodal, bimodal or multimodal are obtained by polymerization or copolymerization of olefins of the formula RCH.dbd.CHR, in which a catalyst system comprising an aluminoxane and a transition-metal component (metallocene) is used, the transition-metal component comprising at least one zirconocene of the formula I ##STR1## and at least one zirconocene of the formula Ia or alternatively at least 2 zirconocenes of the formula I.
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: September 27, 1994
    Assignee: Hoechst AG
    Inventors: Andreas Winter, Volker Dolle, Walter Spaleck
  • Patent number: 5328969
    Abstract: A very active catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 is hydrogen, R.sup.4 to R.sup.6 are alkyl or aryl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n is a single- or multi-membered chain, in which R.sup.7 can also be a (substituted) hetero atom, and m+n is zero or 1.
    Type: Grant
    Filed: November 24, 1992
    Date of Patent: July 12, 1994
    Assignee: Hoechst Aktiengellschaft
    Inventors: Andreas Winter, Jurgen Rohrmann, Volker Dolle, Frank Kuber
  • Patent number: 5322902
    Abstract: A propylene block copolymer having good flow properties and a very good low temperature impact strength is obtained in a high yield if a catalyst which consists of a chiral metallocene, containing a bridge, of the formula I ##STR1## and an aluminoxane is used for the polymerization of propylene and the comonomers.The polymerization is carried out in two stages, a crystalline propylene polymer being prepared in the first stage.
    Type: Grant
    Filed: December 19, 1990
    Date of Patent: June 21, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Michael Schreck, Andreas Winter, Volker Dolle, Hartmut Kondoch, Martin Antberg, Jurgen Rohrmann
  • Patent number: 5304614
    Abstract: A very active catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I or Ia ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen or alkyl, R.sup.5 and R.sup.6 are alkyl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n is a chain with one or more members, in which R.sup.7 can also be a (substituted) heteroatom, and m+n is zero or 1.
    Type: Grant
    Filed: October 14, 1992
    Date of Patent: April 19, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Andreas Winter, Martin Antberg, Volker Dolle, Jurgen Rohrmann, Walter Spaleck
  • Patent number: 5276208
    Abstract: The novel metallocenes of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen, R.sup.5 and R.sup.6 are alkyl or haloalkyl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n -- is a single- or multi-membered chain in which R.sup.7 may also be a (substituted) hetero atom, m+n is zero or 1, and R.sup.10 is hydrogen, form, together with aluminoxanes as cocatalysts, a very effective catalyst system for the preparation of polyolefins of high stereospecificity and high melting point.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: January 4, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Andreas Winter, Martin Antberg, Walter Spaleck, Jurgen Rohrmann, Volker Dolle
  • Patent number: 5254394
    Abstract: A polyolefin film which comprises a polypropylene base layer and at least one top layer of a propylene polymer, wherein the base layer is formed of an isotactic polypropylene and the top layer of a syndiotactic polypropylene, has high sealed-seam strength and excellent optical properties and is useful as, for example, a packaging material.
    Type: Grant
    Filed: November 4, 1991
    Date of Patent: October 19, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Lothar Bothe, Volker Dolle, Andreas Winter, Thomas Wilhelm
  • Patent number: 5252384
    Abstract: A polyolefin film which comprises a polypropylene base layer and at least one top layer comprising a propylene polymer, wherein the base layer is formed of an isotactic polypropylene and the top layer of a copolymer of an o-olefin having 2 to 8 carbon atoms and a syndiotactic propylene, has high sealed-seam strength and excellent optical properties and is useful as, for example, a packaging material.
    Type: Grant
    Filed: November 4, 1991
    Date of Patent: October 12, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Lothar Bothe, Volker Dolle, Andreas Winter, Thomas Wilhelm
  • Patent number: 5243001
    Abstract: A very active catalyst system for olefin polymerization is composed of an aluminoxane and a metallocene of the formula I ##STR1## wherein preferably M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen, R.sup.5 and R.sup.6 are alkyl or haloalkyl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.m --is a single-membered or multimembered chain in which R.sup.7 may also be a (substituted) hetero atom, and m+n is zero or 1. The catalyst system gives polymers having a high molecular weight and high stereospecificity.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: September 7, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Andreas Winter, Martin Antberg, Walter Spaleck, Jurgen Rohrmann, Volker Dolle
  • Patent number: 5239022
    Abstract: A very active catalyst system for olefin polymerization is composed of an aluminoxane and a metallocene of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen, R.sup.5 and R.sup.6 are alkyl or haloalkyl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n -- is a single-membered or multimembered chain in which R.sup.7 may furthermore be a (substituted) hetero atom, m+n is zero or 1 and R.sup.10 is hydrogen. The catalyst system gives polymers having high stereospecificity and a high melting point.
    Type: Grant
    Filed: October 15, 1992
    Date of Patent: August 24, 1993
    Assignee: hoechst Aktiengesellschaft
    Inventors: Andreas Winter, Martin Antberg, Walter Spaleck, Jurgen Rohrmann, Volker Dolle
  • Patent number: 5232993
    Abstract: A polypropylene molding composition having syndiotactic polymer chains is obtained in a high yield by the copolymerization of propylene with ethylene or a 1-olefin of the formula R.sup.a --CH.dbd.CH--R.sup.b in the presence of a catalyst comprising a metallocene of the formula I ##STR1## in which M.sup.1 is titanium, zirconium, hafnium, vanadium, riobium or tantalum, and an aluminoxane. This molding composition has a very high molecular weight, a very narrow molecular-weight distribution and very high syndiotaxy. Shaped articles produced from the molding composition are distinguished by high transparency, flexibility, bear strength and excellent surface luster.
    Type: Grant
    Filed: December 19, 1990
    Date of Patent: August 3, 1993
    Assignee: Hoechst AG
    Inventors: Andreas Winter, Volker Dolle, Jurgen Rohrmann, Walter Spaleck, Martin Antberg
  • Patent number: 5216095
    Abstract: Olefins of the formulaR.sup.11 --CH.dbd.CH--R.sup.12(R.sup.11 and R.sup.12 =H or C.sub.1 -C.sub.14 -alkyl) are polymerized in the presence of a catalyst comprising at least one metallocene of the formula I ##STR1## (M=zirconium or hafnium) and an aluminoxane, giving polymers of high molecular weight in high yield.
    Type: Grant
    Filed: May 9, 1991
    Date of Patent: June 1, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Volker Dolle, Martin Antberg, Jurgen Rohrmann, Andreas Winter
  • Patent number: 5145819
    Abstract: The novel metallocenes of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen, R.sup.5 and R.sup.6 are alkyl or haloalkyl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n -- is a single- or multi-membered chain in which R.sup.7 may also be a (substituted) hetero atom, and m+n is zero or 1, form, together with aluminoxanes as cocatalysts, a very effective catalyst system for the preparation of polyolefins of high molecular weight.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: September 8, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Andreas Winter, Martin Antberg, Walter Spaleck, Jurgen Rohrmann, Volker Dolle