Patents by Inventor Michael Erkelenz

Michael Erkelenz 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: 11795323
    Abstract: The invention relates to a composition obtainable by mixing polycarbonate, unsized talc and a specific anhydride-modified alpha-olefin polymer, wherein the amounts of the talc and the specific anhydride-modified alpha-olefin polymer are matched to one another such that, for every 10 parts by weight of the talc, 0.10 to 1.4 parts by weight of the anhydride-modified alpha-olefin polymer are used. It has been shown that in situ sizing of talc with the wax can minimize the degradation of the polycarbonate only in the course of mixing with the polycarbonate and, at the same time, properties such as multiaxial impact resistance and flowability can be improved.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: October 24, 2023
    Assignee: Covestro Deutschland AG
    Inventors: Christopher Schirwitz, Michael Erkelenz, Birte Sämisch, Alexander Meyer
  • Publication number: 20220396675
    Abstract: A method for producing a molding compound having improved surface properties is provided. The method relates to, in particular, a molding compound comprising a polycarbonate and at least one reinforcing filler, preferably selected from the group including titanium dioxide (TiO2), talc (Mg3Si4O10(OH)2), dolomite CaMg[CO3]2, kaolinite Al4[(OH)8|Si4O10] and wollastonite Ca3[Si3O9], preferably selected from the group including titanium dioxide (TiO2) and talc (Mg3Si4O10(OH)2). The total amount of reinforcing filler is 3 to 20 wt. %, preferably 4.5 to 15 wt. %, each relative to the total mass of the molding compound, the molding compound having improved properties being produced using at least one master batch produced according to the method.
    Type: Application
    Filed: December 9, 2020
    Publication date: December 15, 2022
    Inventors: Reiner Rudolf, Michael Erkelenz, Hans-Juergen Thiem
  • Publication number: 20220380596
    Abstract: A method for producing a master batch having improved properties is provided. The method relates to, in particular, a master batch containing a polycarbonate and a reinforcing filler, preferably selected from one or more members of the group including the members titanium dioxide (TiO2), talc (Mg3Si4O10(OH)2), dolomite CaMg[CO3]2, kaolinite Al4[(OH)8|Si4O10] and wollastonite Ca3[Si3O9], preferably selected from one or more members of the group including the members titanium dioxide (TiO2) and talc (Mg3Si4O10(OH)2). The content of the reinforcing filler is 30 to 70 wt. %, preferably 35 to 65 wt. %, particularly 40 to 60 wt. %, relative to the total weight of the molding compound. A method for producing a molding compound having improved properties is also provided.
    Type: Application
    Filed: December 9, 2020
    Publication date: December 1, 2022
    Inventors: Michael Erkelenz, Reiner Rudolf, Hans-Juergen Thiem
  • Publication number: 20220162442
    Abstract: The invention relates to a composition obtainable by mixing polycarbonate, unsized talc and a specific anhydride-modified alpha-olefin polymer, wherein the amounts of the talc and the specific anhydride-modified alpha-olefin polymer are matched to one another such that, for every 10 parts by weight of the talc, 0.10 to 1.4 parts by weight of the anhydride-modified alpha-olefin polymer are used. It has been shown that in situ sizing of talc with the wax can minimize the degradation of the polycarbonate only in the course of mixing with the polycarbonate and, at the same time, properties such as multiaxial impact resistance and flowability can be improved.
    Type: Application
    Filed: August 23, 2017
    Publication date: May 26, 2022
    Inventors: Christopher Schirwitz, Michael ERKELENZ, Birte SÄMISCH, Alexander MEYER
  • Publication number: 20220135755
    Abstract: The invention relates to a multilayer body comprising at least one substrate layer, a metal layer bonded directly thereto and optionally at least one protective layer atop the metal layer, wherein the substrate layer comprises a composition which is obtained by mixing polycarbonate, talc and a specific wax. It was shown that the multilayer bodies obtained are particularly suitable for use as reflectors and (housing) components for light sources and heat sources and displays.
    Type: Application
    Filed: December 12, 2018
    Publication date: May 5, 2022
    Applicant: Covestro Deutschland AG
    Inventors: Christopher SCHIRWITZ, Michael ERKELENZ, Birte SÄMISCH, Rainer PROTTE, Martin DÖBLER, Eckhard WENZ
  • Publication number: 20210316491
    Abstract: The invention relates to a method for producing a molding compound having improved properties. In particular, the invention relates to the production of a molding compound containing a polycarbonate and a reinforcing filler. According to the invention, said molding compound can be obtained by compounding a polycarbonate and the reinforcing filler by means of multi-shaft extruder having screw shafts arranged annularly with respect to one another. The reinforcing filler is preferably selected from one or more members of the group comprising the members titanium dioxide (TiO2), talc (Mg3Si4O10(OH)2), dolomite (CaMg[CO3]2). kaolinite (Al4[(OH)8|Si4O10]) and wollastonitc (Ca3[Si3O9]), preferably from one or more members of the group comprising the members titanium dioxide (TiO2) and talc (Mg3Si4O10(OH)2). According to the invention, tlie concentration of reinforcing filler is 3 to 50 wt % in relation to the total mass of tlie molding compound.
    Type: Application
    Filed: August 15, 2019
    Publication date: October 14, 2021
    Inventors: Michael Erkelenz, Reiner Rudolf, Hans-Juergen Thiem
  • Patent number: 10717871
    Abstract: The present invention relates to flame-retardant moulding compositions comprising glass fibre and siloxane-containing polycarbonate block cocondensate, and also to a process for the production of these moulding compositions. The invention further relates to the use of these flame-retardant moulding compositions in injection-moulding and extrusion applications.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: July 21, 2020
    Assignee: Covestro Deutschland AG
    Inventors: Alexander Meyer, Klaus Horn, Timo Kuhlmann, Michael Erkelenz, Ulrich Liesenfelder
  • Patent number: 10472516
    Abstract: The present invention relates to the use of diglycerol esters to enhance the flowability of graphite-containing, thermally conductive polycarbonate compositions. Melt viscosities and melt volume flow rates are improved.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: November 12, 2019
    Assignee: Coverstro Deutschland AG
    Inventors: Helmut Werner Heuer, Rolf Wehrmann, Anke Boumans, Michael Erkelenz
  • Patent number: 10189941
    Abstract: The invention relates to polycarbonate compositions with an improved thermal behavior and improved slip characteristics, achieved by the use of oxidized, acid-modified polyethylene waxes.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: January 29, 2019
    Assignee: Covestro Deutschland AG
    Inventors: Rolf Wehrmann, Helmut Werner Heuer, Anke Boumans, Michael Erkelenz
  • Publication number: 20180201780
    Abstract: The present invention relates to the use of diglycerol esters to enhance the flowability of graphite-containing, thermally conductive polycarbonate compositions. Melt viscosities and melt volume flow rates are improved.
    Type: Application
    Filed: July 5, 2016
    Publication date: July 19, 2018
    Inventors: Helmut Werner HEUER, Rolf WEHRMANN, Anke BOUMANS, Michael ERKELENZ
  • Publication number: 20170369707
    Abstract: The present invention relates to flame-retardant moulding compositions comprising glass fibre and siloxane-containing polycarbonate block cocondensate, and also to a process for the production of these moulding compositions. The invention further relates to the use of these flame-retardant moulding compositions in injection-moulding and extrusion applications.
    Type: Application
    Filed: January 18, 2016
    Publication date: December 28, 2017
    Inventors: Alexander MEYER, Klaus HORN, Timo KUHLMANN, Michael ERKELENZ, Ulrich LIESENFELDER
  • Publication number: 20170362430
    Abstract: The present invention relates to glass fibre, carbon fibre and/or carbon nanotube reinforced polycarbonate compositions comprising flame retardant, diglycerol monoester and optionally antidripping agent and having high flowability, excellent stiffness and possibly improved flame retardant properties. The present invention further relates to the use of the compositions according to the invention in particular in the manufacture of housing parts in the EE and IT sector, for example for electrical housings/junction boxes or for frames of LCD/LED screens and also for component parts for the manufacture of Ultrabooks.
    Type: Application
    Filed: November 26, 2015
    Publication date: December 21, 2017
    Inventors: Helmut Werner HEUER, Rolf WEHRMANN, Anke BOUMANS, Michael ERKELENZ, Hans FRANSSEN
  • Publication number: 20170355816
    Abstract: The invention relates to polycarbonate compositions with an improved thermal behaviour and improved slip characteristics, achieved by the use of oxidised, acid-modified polyethylene waxes.
    Type: Application
    Filed: December 2, 2015
    Publication date: December 14, 2017
    Inventors: Rolf WEHRMANN, Helmut Werner HEUER, Anke BOUMANS, Michael ERKELENZ
  • Patent number: 9713915
    Abstract: The invention relates to at least partly transparent or translucent molded plastic parts for producing noise protection walls, facade components, and glazings which ensure effective bird protection. In particular, the invention relates to molded plastic parts comprising g) at least one substrate layer (matrix/base layer) containing at least one thermoplastic polymer, wherein the substrate layer comprises a base layer and a coextrusion layer adjoining said base layer, said coextrusion layer comprising at least one IR absorber; a) optionally at least one cover layer on at least one face of the substrate layer; and b) optionally a primer or an intermediate layer between the layers a) and b). The invention is characterized in that the molded plastic part has markings in the substrate layer, said markings reducing the transparency of the molded part in the wavelength range of 380 to 780 nm in the marked regions.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: July 25, 2017
    Assignee: Covestro Deutschland AG
    Inventors: Timo Kuhlmann, Michael Erkelenz, Emmanuel Bral
  • Patent number: 9651712
    Abstract: The invention relates to polymer compositions for the production of mouldings, in particular spectacles and eye-protection equipment, which comply with the provisions of EN 169 (welder protection standard) and EN 1836/2005 (signal light detection). The compositions and mouldings are in particular processable at temperatures above 265° C., recyclable and have a notched impact strength of at least 65 kJ/cm2, and they comply with the required optical standards mentioned above.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: May 16, 2017
    Assignee: Covestro Deutschland AG
    Inventors: Michael Erkelenz, Rolf Wehrmann, Anke Boumans
  • Publication number: 20160280910
    Abstract: Provided are glass-fiber reinforced polycarbonate compositions with high stiffness and with improved thermal and rheological behavior in combination with improved flame-retardancy properties. Said compositions can be used to produce mouldings, especially those thin-walled housing parts or switch boxes with a wall thickness from 1.0 mm to 0.75 mm in the EE and IT sectors, while still meet the requirements for the fire-protection classification UL 94 VI, preferably V0.
    Type: Application
    Filed: November 4, 2014
    Publication date: September 29, 2016
    Inventors: Michael ERKELENZ, Timo KUHLMANN, Leith WANG, Yu REN
  • Patent number: 9296893
    Abstract: The present invention relates to flame-resistant, thermoplastic molding compositions containing at least one aromatic polycarbonate, at least one flameproofing agent, at least one rubber-free anhydride-modified alpha-olefin terpolymer, at least one glass fiber, at least one antidripping agent, and optionally, at least one mold release agent and/or further additives. The present invention furthermore relates to the use of the compositions according to the invention for the production of thin-walled housing parts or switch boxes in the EE sector.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: March 29, 2016
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Michael Erkelenz, Hans Franssen, Helmut Werner Heuer
  • Publication number: 20160040010
    Abstract: The present invention relates to glass fibre-reinforced polycarbonate compositions of high rigidity and improved thermal and rheological properties in combination with improved flameproofing properties and a significantly increased Vicat temperature. The present invention furthermore relates to the use of the compositions according to the invention for the production of thin-walled housing parts or switch boxes in the EE (electrical/electronics) and IT (information technology) sector.
    Type: Application
    Filed: October 26, 2015
    Publication date: February 11, 2016
    Inventors: Michael Erkelenz, Hans Franssen, Helmust Werner Heuer
  • Publication number: 20150375485
    Abstract: The invention relates to at least partly transparent or translucent molded plastic parts for producing noise protection walls, facade components, and glazings which ensure effective bird protection. In particular, the invention relates to molded plastic parts comprising g) at least one substrate layer (matrix/base layer) containing at least one thermoplastic polymer, wherein the substrate layer comprises a base layer and a coextrusion layer adjoining said base layer, said coextrusion layer comprising at least one IR absorber; a) optionally at least one cover layer on at least one face of the substrate layer; and b) optionally a primer or an intermediate layer between the layers a) and b). The invention is characterized in that the molded plastic part has markings in the substrate layer, said markings reducing the transparency of the molded part in the wavelength range of 380 to 780 nm in the marked regions.
    Type: Application
    Filed: January 16, 2014
    Publication date: December 31, 2015
    Inventors: Timo KUHLMANN, Michael ERKELENZ, Emmanuel BRAL
  • Publication number: 20150011689
    Abstract: The present invention relates to glass fibre-reinforced polycarbonate compositions of high rigidity and improved thermal and rheological properties in combination with improved flameproofing properties and a significantly increased Vicat temperature. The present invention furthermore relates to the use of the compositions according to the invention for the production of thin-walled housing parts or switch boxes in the EE (electrical/electronics) and IT (information technology) sector.
    Type: Application
    Filed: November 30, 2012
    Publication date: January 8, 2015
    Applicant: Bayer Intellectual Property Gmbh
    Inventors: Michael Erkelenz, Hans Franssen, Helmut Werner Heuer