Patents by Inventor Harald Pielartzik

Harald Pielartzik 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: 6805816
    Abstract: The invention relates to a process for the preparation of &pgr;-conjugated polymers by (1) complexing a monomeric compound with a cyclodextrin, and (2) polymerizing the complexed compound using a chemical oxidant.
    Type: Grant
    Filed: November 16, 2001
    Date of Patent: October 19, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lambertus Groenendaal, Friedrich Jonas, Harald Pielartzik, Helmut Ritter, Joachim Storsberg
  • Patent number: 6784278
    Abstract: The use of phenols having a branched structure as terminal groups in polycarbonates, polyester carbonates and polyesters is disclosed. Also disclosed are polycarbonates, polyester carbonates and polyesters having such branched terminal groups, the process for their production and molded parts made therefrom.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: August 31, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Helmut-Werner Heuer, Rolf Wehrmann, Alexander Meyer, Harald Pielartzik, Friedrich-Karl Bruder, Jos M. J. Paulusse
  • Patent number: 6670406
    Abstract: The present invention relates to a process for the production of a polyether polyol by polyaddition of an alkylene oxide onto a starter compound containing active hydrogen atoms conducted in the presence of a double metal cyanide catalyst comprising conducting a reaction mixture at least once through a zone which has an energy density of at least 5×106 J/m3, wherein the dwell time of the reaction mixture in this zone is at least 10−6 seconds per pass.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: December 30, 2003
    Assignees: Bayer Aktiengesellschaft, Bayer Polymers LLC
    Inventors: Jörg Hofmann, Stephan Ehlers, Bernd Klinksiek, Bert Klesczewski, Christian Steinlein, Lars Obendorf, Harald Pielartzik, Jose F. Pazos
  • Publication number: 20030096941
    Abstract: The use of phenols having a branched structure as terminal groups in polycarbonates, polyester carbonates and polyesters is disclosed. Also disclosed are polycarbonates, polyester carbonates and polyesters having such branched terminal groups, the process for their production and molded parts made therefrom.
    Type: Application
    Filed: June 11, 2002
    Publication date: May 22, 2003
    Inventors: Helmut-Werner Heuer, Rolf Wehrmann, Alexander Meyer, Harald Pielartzik, Friedrich-Karl Bruder, Jos M.J. Paulusse
  • Publication number: 20020198278
    Abstract: The present invention relates to a process for the production of a polyether polyol by polyaddition of an alkylene oxide onto a starter compound containing active hydrogen atoms conducted in the presence of a double metal cyanide catalyst comprising conducting a reaction mixture at least once through a zone which has an energy density of at least 5×106 J/m3, wherein the dwell time of the reaction mixture in this zone is at least 10−6 seconds per pass.
    Type: Application
    Filed: February 19, 2002
    Publication date: December 26, 2002
    Inventors: Jorg Hofmann, Stephan Ehlers, Bernd Klinksiek, Bert Klesczewski, Christian Steinlein, Lars Obendorf, Harald Pielartzik, Jose F. Pazos
  • Patent number: 6458918
    Abstract: The present invention relates to a process for the preparation of novel, partially crystalline polyether polyols with a functionality of ≧2, an average molecular weight Mn of 500 to 100,000 and a molar proportion of isotactic triads determining the crystallinity of >28%. The new polyether polyols are prepared by polymerizing alkylene oxides in the presence of a bimetallic :-oxoalkoxide modified with hydroxyl compounds.
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: October 1, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Walter Schäfer, Jörg Hofmann, Pramod Gupta, Hanns-Peter Müller, Harald Pielartzik
  • Patent number: 6297346
    Abstract: The present invention relates to mixtures of cyclic oligocarbonates, to their production by way of mixtures of bischloroformates, and to their use for the production of linear polycarbonates and for the modification of other linear polycarbonates.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: October 2, 2001
    Assignees: Bayer Aktiengesellschaft, Bayer Corporation
    Inventors: Burkhard Köhler, Duane Priddy, Jr., Yun Chen, Harald Pielartzik, Robert Kumpf
  • Patent number: 6156871
    Abstract: The present invention relates to mixtures of cyclic oligocarbonates, to their production by way of mixtures of bischloroformates, and to their use for the production of linear polycarbonates and for the modification of other linear polycarbonates.
    Type: Grant
    Filed: September 4, 1997
    Date of Patent: December 5, 2000
    Assignees: Bayer Aktiengesellschaft, Bayer Corporation
    Inventors: Burkhard Kohler, Duane Priddy, Jr., Yun Chen, Harald Pielartzik, Robert Kumpf
  • Patent number: 6093793
    Abstract: Polyether polyols are produced by acid-catalyzed polyaddition of alkylene oxides to starter compounds having active hydrogen atoms. Perfluoroalkylsulfonic acid salts of metals from Group IIIA of the Periodic Table of Elements (corresponding to the IUPAC Convention of 1970) are used as the catalyst. The polyaddition reaction is carried out at a temperature of from 40 to 200.degree. C. at normal pressure or pressures from 0 to 20 mbar (absolute). An inert organic solvent may optionally be included in the reaction mixture. Substantially all of the catalyst is removed from the polyether polyol-containing reaction mixture by lowering the temperature and/or by addition of a precipitating agent and/or by extraction with water. If desired, the recovered catalyst may be used in subsequent polyaddition reactions.
    Type: Grant
    Filed: January 20, 1998
    Date of Patent: July 25, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jorg Hofmann, Pramod Gupta, Harald Pielartzik
  • Patent number: 5998327
    Abstract: The invention relates to novel zinc/metal hexacyanocobaltate complex compounds corresponding to the formula:Zn.sub.3-v M.sub.v [Co(CN).sub.6 ].sub.2.w(H.sub.2 O).x(L).y[Zn(X).sub.n ].z[M(Y).sub.m)].These complex compounds are suitable catalysts. This invention also relates to a process for the production of the compounds, and to the use of the compounds in a process for the production of polyether polyols.These novel zinc/metal hexacyanocobaltate complex compounds when used as catalysts in a process for the production of polyether polyols substantially reduce the induction period of the polyaddition reaction of alkylene oxides to starter compounds containing hydrogen atoms. Furthermore, the resultant polyether polyols have a significantly narrower molecular weight distribution.
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: December 7, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jorg Hofmann, Pramod Gupta, Harald Pielartzik, Pieter Ooms, Walter Schafer
  • Patent number: 5932664
    Abstract: Process for the production of hydrogenated, ring-opened metathesis (co)polymers from cyclic olefins using the ruthenium-carbene complexes of the general formula (I) ##STR1## in which R.sub.1 and R.sub.2 mutually independently mean hydrogen, C.sub.2 -C.sub.20 alkenyl, C.sub.1 -C.sub.20 alkyl, aryl, C.sub.1 -C.sub.20 carboxylate, C.sub.1 -C.sub.20 alkoxy, C.sub.2 -C.sub.20 alkenyloxy, aryloxy, C.sub.2 -C.sub.20 alkoxycarbon-yl,C.sub.1 -C.sub.20 alkylthio, which may optionally be substituted by C.sub.1 -C.sub.5 alkyl, halogen, C.sub.1 -C.sub.5 alkoxy or by phenyl optionally substituted by C.sub.1 -C.sub.5 alkyl, halogen, C.sub.1 -C.sub.5 alkoxy;X.sub.1 and X.sub.2 mutually independently mean any desired anionic ligand;L.sub.1 and L.sub.2 mutually independently mean any desired neutral electron donorand two or three of X.sub.1, X.sub.2, L.sub.1 and L.sub.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: August 3, 1999
    Assignee: Bayer AG
    Inventors: Yun Chen, Ralf Dujardin, Harald Pielartzik, Uli Werner Franz
  • Patent number: 5786440
    Abstract: A process for the manufacture of cyclic oligocarbonate is disclosed. The process comprises a reaction of a bis-chlorocarbonic acid ester with isatinbisphenol or with a bis-chlorocarbonic ester thereof. The mixture of cyclic oligocarbonates thus prepared is useful as a precursor in the preparation of modified polycarbonate or polyester resins.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: July 28, 1998
    Assignees: Bayer Aktiengesellschaft, Bayer Corporation
    Inventors: Burkhard Kohler, Duane B. Priddy, Jr., Yun Chen, Harald Pielartzik, Robert-Joseph Kumpf
  • Patent number: 5693722
    Abstract: A process is disclosed whereby a polymeric resin (containing ester and/or carbonate bonds) is readily converted into a resin having a modified molecular structure. Accordingly, a polycyclic carbonate (a monomer or oligomer) is transesterified with the polymer resin in the melt, preferably upon extrusion, optionally in the presence of a catalyst. Significantly, the cyclic carbonates are, by the inventive process, inserted into the structure of the polymer, effecting branching of the molecular structure, a branching which manifests itself in the modified properties of the resin.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: December 2, 1997
    Assignees: Bayer Corporation, Bayer Aktiengesellschaft
    Inventors: Duane B. Priddy, Jr., Burkhard Kohler, Robert J. Kumpf, Harald Pielartzik
  • Patent number: 5688590
    Abstract: The invention is directed to a process for preparing SRIM molded article. The process broadly requires the use of a fiber reinforcement mat which is placed inside the mold cavity, and then a polyurethane reaction system is injected into the mold. The system comprising a polyisocyanate and a blend of active hydrogen containing compounds requires aldimines as part of the blend of active hydrogen containing compounds.
    Type: Grant
    Filed: August 21, 1995
    Date of Patent: November 18, 1997
    Assignee: Bayer Corporation
    Inventors: E. Haakan Jonsson, Kristen L. Parks, Harald Pielartzik, Philip E. Yeske, Douglas A. Wicks
  • Patent number: 5633389
    Abstract: The invention relates to a thermoreversible process for the preparation of a hydantoin comprisng(a) reacting an unsaturated polyester with a monofunctional amine to yield a poly(ester aspartate), and(b) reacting said poly(ester aspartate) with an isocyanate to produce a poly(ester urea), and(c) heating said poly(ester urea) to form a hydantoin compound.The process is useful for the preparation of coatings.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: May 27, 1997
    Assignee: Bayer Corporation
    Inventors: Erik H. Jonsson, Philip E. Yeske, Douglas A. Wicks, Harald Pielartzik
  • Patent number: 5623019
    Abstract: A compatibilized thermoplastic molding composition containing polyurethane and polyolefin resins is disclosed. Accordingly, a particularly structured copolymer having a number average molecular weight of about 25,000 to 350,000 and containing blocks of monoalkylene arene and either hydrogenated conjugated diene or non-hydrogenated conjugated diene, was found to compatibilize the composition. Articles molded from the composition are characterized by their good mechanical properties.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: April 22, 1997
    Assignee: Bayer Corporation
    Inventors: Jeffrey S. Wiggins, Harald Pielartzik, Robert J. Kumpf, Joachim Franke, Clifford J. Lau
  • Patent number: 5618889
    Abstract: Block copolymers represented by the formula ##STR1## are formed by contacting an ester group containing poly(aryl ether ketone) composed of the recurring units ##STR2## with a liquid crystalline polyester represented by the formula ##STR3## in which R.sub.1, R.sub.2 X.sub.2, X, Z, E.sup.1, E.sup.2 E.sup.5, w, x, y, z a, b and n each represent specified groups or values under conditions such that a transesterification reaction will occur.
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: April 8, 1997
    Assignee: Bayer Corporation
    Inventors: Robert J. Kumpf, Douglas A. Wicks, Dittmar K. Nerger, Harald Pielartzik, Rolf Wehrmann
  • Patent number: 5529739
    Abstract: The present invention is directed to an improved internal mold release system for the production of high density molded SRIM parts, i.e. molded parts having a density of from 1.3 to 2.0 g/cc. In particular, the process involves reacting a reaction mixture comprising an organic polyisocyanate and at least one organic compound containing isocyanate-reactive hydrogens in the presence of a catalyst and an internal mold release agent in a closed mold. The internal mold release agent is a compound corresponding to the formula: ##STR1## wherein R.sup.2 represents hydrogen, the group R.sup.5 --NH--CO--, or a C.sub.1 to C.sub.24 alkyl or substituted alkyl group, a C.sub.3 to C.sub.24 cycloalkyl or substituted cycloalkyl group, a C.sub.2 to C.sub.24 alkenyl or substituted alkenyl group, or a C.sub.6 to C.sub.24 aryl or substituted aryl group, andwherein R.sup.1, R.sup.3, R.sup.4 and R.sup.5 may be the same or different and represent a C.sub.1 to C.sub.24 alkyl or substituted alkyl group, a C.sub.3 to C.sub.
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: June 25, 1996
    Assignee: Bayer Corporation
    Inventors: Erik H. Jonsson, Harald Pielartzik, Kristen L. Parks, Randall C. Rains
  • Patent number: 5464893
    Abstract: A thermoplastic molding composition stabilized against .gamma.-rays and its application for manufacture of medical equipment is disclosed. The composition contains an aromatic polycarbonate and(i) dialkyl and/or dicycloalkyl monosulfides or polysulfides in an amount of 0.001 to 5 weight %, and optionally(ii) aliphatic or cycloaliphatic monoalcohols or polyalcohols or their derivatives in an amount of 0.001 to 2 weight %said percent being relative to 100 weight % of aromatic polycarbonate.
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: November 7, 1995
    Assignees: Bayer Aktiengesellschaft, Bayer Corporation
    Inventors: Rick L. Archey, Charles E. Lundy, Aaron D. Meltzer, Harald Pielartzik, Gerhard Fennhoff, Ralf Hufen, Klaus Kircher, Rudiger Schubart, Richard Weider
  • Patent number: 5453457
    Abstract: Esters and polyesters which contain disulfide linkages were found to be effective stabilizers of polycarbonate resin. Accordingly, a polycarbonate composition containing disulfide esters, alone or as a coadditive with a polyether is rendered more resistant to the deterioration resulting upon exposure to gamma radiation.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: September 26, 1995
    Assignee: Bayer Corporation
    Inventors: Aaron D. Meltzer, Harald Pielartzik, Rick Archey