Patents by Inventor Helmut Werner Heuer

Helmut Werner Heuer 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).

  • Branched melt polycarbonate with low content of defective structures
    Patent number: 8487025
    Abstract: The present invention relates to an aromatic branched polycarbonate, produced via melt transesterification of a bisphenol with a diaryl carbonate in the presence of a branching agent, wherein the aromatic branched polycarbonate comprises branching point structures and structures of formula (D) wherein X is a single bond, C1- to C6-alkylene, C2- to C5-alkylidene or C5- to C6-cycloalkylidene, optionally substituted by C1- to C6-alkyl; wherein the amount of D in the aromatic branched polycarbonate is in the range of from 5 to 450 mg per kg of the aromatic branched polycarbonate; and wherein the ratio of the total branching point structures to the total structures of the formula D in the aromatic branched polycarbonate is in the range of from 8 to 200.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: July 16, 2013
    Assignee: Bayer Material Science AG
    Inventors: Stephan Konrad, Helmut-Werner Heuer, Karl-Heinz Köhler, Christian Münnich, Rolf Wehrmann
  • Polycarbonate compositions having improved surface hardness
    Patent number: 8470934
    Abstract: The present invention relates to polycarbonate compositions having improved surface hardness, processes for the preparation thereof and the use thereof for the production of blends, shaped articles and extrudates.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: June 25, 2013
    Assignee: Bayer MaterialScience AG
    Inventors: Helmut-Werner Heuer, Rolf Wehrmann
  • POLYMERIC ANTI-STATIC AGENT
    Publication number: 20130109809
    Abstract: The application relates to polymeric antistatic agents for use in polymer moulding compositions, as well as moulding compositions containing these antistatic agents, the antistatic agents having good compounding properties and being inexpensive to produce, wherein the antistatic agent is an antistatic agent of the general formula (I) having a polymeric cationic polyelectrolyte constituent produced from diallyldialkylammonium compounds and an anionic counterion A?, in which R1 is uniformly or mutually independently C1-C18 alkyl, A? is an acid anion, and n is a whole number from 10 to 1000.
    Type: Application
    Filed: April 20, 2011
    Publication date: May 2, 2013
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Helmut Werner Heuer, Rolf Wehrmann
  • High molecular weight, random, bisphenol based copoly(phosphonate carbonate)s
    Patent number: 8389664
    Abstract: Disclosed are random copoly(phosphonate carbonate)s with the high molecular weight and narrow molecular weight distribution exhibiting a superior combination of properties compared to prior art.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: March 5, 2013
    Assignees: FRX Polymers, Inc., Bayer Material Science AG
    Inventors: Dieter Freitag, Pin Go, Lawino Kagumba, Stephan Konrad, Helmut-Werner Heuer, Berit Krauter, Pieter Ooms, Michael Prein, Johann Rechner
  • Copolycarbonates having improved surface hardness
    Patent number: 8329852
    Abstract: The present invention relates to copolycarbonates having improved surface hardness, processes for the preparation thereof and the use thereof for the production of blends, shaped articles and extrudates.
    Type: Grant
    Filed: November 14, 2009
    Date of Patent: December 11, 2012
    Assignee: Bayer MaterialScience AG
    Inventors: Helmut-Werner Heuer, Rolf Wehrmann, Alexander Karbach
  • UV-STABLE POLYCARBONATE COMPOSITION HAVING IMPROVED PROPERTIES
    Publication number: 20120232196
    Abstract: The invention relates to a UV-stabilised melt polycarbonate composition having improved melt flowability while at the same time having good optical properties and at the same time good hydrolytic stability, the composition comprising a melt polycarbonate, at least one UV absorber, at least one phosphine and optionally an aliphatic carboxylic acid ester.
    Type: Application
    Filed: September 17, 2010
    Publication date: September 13, 2012
    Applicant: Bayer MaterialScience AG
    Inventors: Stephan Konrad, Helmut Werner Heuer, Karl-Heinz Köhler, Rolf Wehrmann, Daniel Koch, Marc Buts, Frank Guldentops
  • POLYCARBONATE COMPOSITIONS WITH IMPROVED MELT STABILITY
    Publication number: 20120208936
    Abstract: The invention relates to polycarbonate compositions and copolycarbonate compositions with improved melt stability, the preparation thereof and the use thereof for the production of mouldings and mouldings obtainable therefrom, wherein the compositions contain a polycarbonate or copolycarbonate containing bisphenol A, and at least one phosphorus compound of the formulae (1) and (2), wherein R1 and R2 independently of each other and among one another are chosen from the group which includes branched alkyl radicals, aryl radicals and substituted aryl radicals.
    Type: Application
    Filed: September 17, 2010
    Publication date: August 16, 2012
    Inventors: Rolf Wehrmann, Helmut Werner Heuer
  • POLYCARBONATE COMPOSITIONS HAVING IMPROVED OPTICAL PROPERTIES
    Publication number: 20120190778
    Abstract: The present invention relates to polycarbonate compositions and copolycarbonate compositions having improved optical properties, and to their production and their use for the production of shaped parts, and to shaped parts which can thereby be obtained, the compositions containing a polycarbonate or copolycarbonate which comprises bisphenol- A and at least one pair of a phosphorus compound having the oxidation number +3 and a phosphorus compound having the oxidation number +5, and the phosphorus compound having the oxidation state +5 in a pair respectively corresponding to the oxidised form of the phosphorus compound having the oxidation state +3 and the amount of more highly oxidised compound contained being less than that of the compound with the lower oxidation number.
    Type: Application
    Filed: September 17, 2010
    Publication date: July 26, 2012
    Applicant: Bayer MaterialScience AG
    Inventors: Rolf Wehrmann, Helmut-Werner Heuer, Anke Boumans
  • Alkylphenol for adjusting the molecular weight, and polycarbonate compositions having improved properties
    Patent number: 8202961
    Abstract: The invention relates to the use of alkylphenols for adjusting the molecular weight of polycarbonates and compositions of these polycarbonates with additives chosen from the group of heat stabilizers, mold release agents and light stabilizers, the use thereof for the production of moldings and moldings obtainable therefrom.
    Type: Grant
    Filed: January 31, 2009
    Date of Patent: June 19, 2012
    Assignee: Bayer MaterialScience AG
    Inventors: Rolf Wehrmann, Helmut-Werner Heuer, Bert Ruytinx
  • Polycarbonate composition with improved melt-flowability
    Patent number: 8163822
    Abstract: The invention relates to a polycarbonate composition with improved melt-flowability together with good optical properties and together with good hydrolysis resistance.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: April 24, 2012
    Assignee: Bayer MaterialScience AG
    Inventors: Stephan Konrad, Rolf Wehrmann, Helmut-Werner Heuer, Karl-Heinz Köhler, Marc Buts
  • Polycarbonates having rearrangement structures, cyclic and linear oligomers and also flow behavior
    Patent number: 8158745
    Abstract: The present invention relates to compositions having improved rheological properties which are based on polycarbonate having rearrangement structures and cyclic and linear oligomers and also moldings and extrudates composed of these polycarbonate compositions.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: April 17, 2012
    Assignee: Bayer MaterialScience AG
    Inventors: Rolf Wehrmann, Helmut-Werner Heuer
  • HIGH MOLECULAR WEIGHT, RANDOM, BISPHENOL BASED COPOLY(PHOSPHONATE CARBONATE)S
    Publication number: 20120068115
    Abstract: Disclosed are random copoly(phosphonate carbonate)s with the high molecular weight and narrow molecular weight distribution exhibiting a superior combination of properties compared to prior art.
    Type: Application
    Filed: September 16, 2011
    Publication date: March 22, 2012
    Applicants: BAYER MATERIAL SCIENCE AG, FRX POLYMERS, INC.
    Inventors: Dieter FREITAG, Pin GO, Lawino KAGUMBA, Stephan KONRAD, Helmut-Werner HEUER, Berit KRAUTER, Pieter OOMS, Michael PREIN, Johann RECHNER
  • Polycarbonates comprising cyclic oligomers and having an improved flow behavior
    Patent number: 8110649
    Abstract: The invention relates to polycarbonates that comprise defect structures and cyclic oligomers and have improved properties. The invention also relates to molded articles and extrudates made from said polycarbonates.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: February 7, 2012
    Assignee: Bayer MaterialScience AG
    Inventors: Rolf Wehrmann, Helmut-Werner Heuer
  • (CO)POLYCARBONATES WITH IMPROVED OPTICAL PROPERTIES
    Publication number: 20120022204
    Abstract: The invention relates to (co)polycarbonate compositions and molding compositions which feature improved optical properties, good flowability, and high heat resistance.
    Type: Application
    Filed: March 18, 2010
    Publication date: January 26, 2012
    Applicant: Bayer MaterialScience AG
    Inventors: Rolf Wehrmann, Helmut Werner Heuer
  • COPOLYCARBONATES WITH IMPROVED PROPERTIES
    Publication number: 20120004375
    Abstract: The present invention relates to copolycarbonates with improved surface hardness, processes for producing the same, and use of the same for producing blends, moldings, and extrudates, foil (layers), foil laminates, and cards.
    Type: Application
    Filed: March 12, 2010
    Publication date: January 5, 2012
    Applicant: Bayer MaterialScience AG
    Inventors: Helmut Werner Heuer, Rolf Wehrmann
  • MULTI-LAYER FILM COMPOSITE HAVING A POLYCARBONATE LAYER
    Publication number: 20110293912
    Abstract: The invention relates to a multi-layer film composite having at least one layer made of polycarbonate or copolycarbonate, characterized in that the polycarbonate or copolycarbonate comprises at least one additive of the general formulas (1) to (8), R1 are selected independently of each other from the group made of C10-C25-alkyl, C10-C25-alkoxy, and C10-C25-alkyl-substituted aryl, R2 are selected independently of each other from the group of C10-C25-alkylcarbonyl or hydrogen, and R3 are selected independently of each other from the group of C10-C25-alkyl.
    Type: Application
    Filed: January 27, 2010
    Publication date: December 1, 2011
    Applicant: Bayer MaterialScience AG
    Inventors: Helmut Werner Heuer, Rolf Wehrmann
  • BRANCHED MELT POLYCARBONATE WITH LOW CONTENT OF DEFECTIVE STRUCTURES
    Publication number: 20110251309
    Abstract: The present invention relates to an aromatic branched polycarbonate, produced via melt transesterification of a bisphenol with a diaryl carbonate in the presence of a branching agent, wherein the aromatic branched polycarbonate comprises branching point structures and structures of formula (D) wherein X is a single bond, C1- to C6-alkylene, C2- to C5-alkylidene or C5- to C6-cycloalkylidene, optionally substituted by C1- to C6-alkyl; wherein the amount of D in the aromatic branched polycarbonate is in the range of from 5 to 450 mg per kg of the aromatic branched polycarbonate; and wherein the ratio of the total branching point structures to the total structures of the formula D in the aromatic branched polycarbonate is in the range of from 8 to 200.
    Type: Application
    Filed: April 7, 2011
    Publication date: October 13, 2011
    Applicant: Bayer MaterialScience AG
    Inventors: Stephan Konrad, Helmut-Werner Heuer, Karl-Heinz Köhler, Christian Münnich, Rolf Wehrmann
  • Alkylphenol-terminated copolycarbonates, processes for preparing the same, molding compositions containing the same, and articles prepared therefrom
    Patent number: 7968671
    Abstract: Copolycarbonates comprising alkylphenolchain terminator groups for adjusting the molecular weight, compositions of these copolycarbonates with additives chosen from the group of heat stabilizers and mold release agents, the use thereof for the production of moldings and moldings obtained therefrom.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: June 28, 2011
    Assignee: Bayer Material Science AG
    Inventors: Helmut-Werner Heuer, Rolf Wehrmann
  • MODIFIED POLYCARBONATES HAVING IMPROVED SURFACE PROPERTIES
    Publication number: 20110152470
    Abstract: The present invention relates to polycarbonates comprising imide-containing aryl mono- or dihydroxy compounds as chain terminators and, respectively, monomer units, and also to compositions comprising the said polycarbonates, to their use for the production of mouldings, and to mouldings obtainable therefrom.
    Type: Application
    Filed: July 30, 2009
    Publication date: June 23, 2011
    Applicant: BAYER MATERIALSCIENCE AG
    Inventors: Alexander Meyer, Helmut-Werner Heuer, Rafael Oser, Rolf Wehrmann
  • POLYCARBONATE HAVING IMPROVED THERMAL AND MECHANICAL PROPERTIES AND REDUCED COEFFICIENTS OF THERMAL EXPANSION
    Publication number: 20110151262
    Abstract: The present invention relates to thermoplastic high-Tg polycarbonates and moulding materials which are distinguished by improved thermal properties and improved mechanical properties, in particular by reduced thermal expansion. The present invention furthermore relates to a process for the preparation of these polycarbonates. In particular, this invention relates to polycarbonates which the structural unit which derives from phthalimide of the formula (I) and polycarbonate compositions and moulding materials therefrom as well as a process for the preparation of these polycarbonates, and the use thereof, in particular as reflectors and display substrates.
    Type: Application
    Filed: December 20, 2010
    Publication date: June 23, 2011
    Applicant: Bayer MaterialScience AG
    Inventors: Helmut-Werner Heuer, Rolf Wehrmann