Patents by Inventor Birte Sämisch

Birte Sämisch 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: 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: 20210115248
    Abstract: The invention relates to a composition for production of a thermoplastic moulding compound, wherein the composition comprises or consists of the following constituents: A) 50-90% by weight of aromatic polycarbonate or polyestercarbonate having a relative solution viscosity of at least 1.285, measured in CH2Cl2 as solvent at 25° C. and a concentration of 0.5 g/100 ml, B) 1-10% by weight of rubber-modified graft polymer, C) 2.5-10% by weight of boron nitride, D) 4-20% by weight of talc, E) 2-20% by weight of phosphorus-containing flame retardant, F) 0-20% by weight of further additives, and to a process for producing the thermoplastic moulding compound, to the moulding compound itself, to the use of the moulding compound for production of mouldings and to the mouldings themselves.
    Type: Application
    Filed: December 13, 2018
    Publication date: April 22, 2021
    Inventors: Vera Taschner, Dirk Kurzidim, Thomas Hoehnk, Klaus Kraner, Birte Saemisch, Thomas Eckel, Eckhard Wenz, Reiner Rudolf, Sven Hobeika, Matthias Kroh
  • Publication number: 20180194926
    Abstract: The present invention relates to thermally conductive compositions based on a thermoplastic polymer and boron nitride. The compositions contain at least one diglycerol ester to improve flow. These compositions additionally have good heat distortion resistance, and so the compositions are especially usable for the production of heat sinks.
    Type: Application
    Filed: July 5, 2016
    Publication date: July 12, 2018
    Inventors: BIRTE SÄMISCH, Rolf WEHRMANN, Helmut Werner HEUER, Timo KUHLMANN
  • Publication number: 20180194925
    Abstract: The present invention relates to a thermally conductive composition based on a thermoplastic polymer and a hybrid boron nitride material. The compositions contain at least one diglycerol ester to improve flow. These compositions additionally have good heat distortion resistance, and so the compositions are especially usable for the production of heat sinks.
    Type: Application
    Filed: July 5, 2016
    Publication date: July 12, 2018
    Inventors: Birte SÄMISCH, Rolf WEHRMANN, Helmut Werner HEUER, Timo KUHLMANN
  • Patent number: 9823393
    Abstract: The invention relates to multilayer structures made of at least one thermoplastic material and having at least one metal layer. The invention further relates to multilayer products encompassing at least three layers comprising a substrate layer made of a substrate comprising specific copolycarbonates and at least one inorganic filler, a metal layer and one or more further layers. The invention further relates to the process for producing the said multilayer structures.
    Type: Grant
    Filed: November 23, 2012
    Date of Patent: November 21, 2017
    Assignee: Covestro Deutschland AG
    Inventors: Alexander Meyer, Martin Doebler, Ulrich Grosser, Rafael Oser, Birte Sämisch, Thomas Grimm
  • Patent number: 9617457
    Abstract: The invention relates to thermally conductive thermoplastic compositions with balanced processing capacity, i.e. with a balanced proportion of melt volume flow rate to heat distortion resistance, comprising a thermoplastic, an expanded graphite, at least one phosphorus compound, and also ethylene/alkyl (meth)acrylate copolymer.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: April 11, 2017
    Assignee: Covestro Deutschland AG
    Inventors: Birte Sämisch, Timo Kuhlmann
  • Publication number: 20170002247
    Abstract: The invention relates to thermally conductive thermoplastic compositions with balanced processing capacity, i.e. with a balanced proportion of melt volume flow rate to heat distortion resistance, comprising a thermoplastic, an expanded graphite, at least one phosphorus compound, and also ethylene/alkyl (meth)acrylate copolymer.
    Type: Application
    Filed: March 11, 2015
    Publication date: January 5, 2017
    Inventors: Birte SÄMISCH, Timo KUHLMANN
  • Patent number: 8916630
    Abstract: The present invention relates to a thermoplastic molding composition composed of polycarbonate and inorganic fillers which comprises from 0.01 to 0.5 part by weight of at least one anhydride-modified alpha-olefin terpolymer and which has a high degree of rigidity and nevertheless exhibits good strength, as well as stress-strain characteristics corresponding to those of an unreinforced polycarbonate. Surprisingly, the molding composition additionally exhibits an improvement in flame retardancy. The invention relates in particular to flame-retardant, thermoplastic molding compositions filled with glass fibers, and to the production and use thereof. The property profile is, surprisingly, independent of the degree of interaction of the filler with the polycarbonate matrix.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: December 23, 2014
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Gesa Dern, Birte Sämisch, Tanja Cassel
  • Publication number: 20140356551
    Abstract: The invention relates to thermoplastic compositions comprising A) 30.0 to 100.0 parts by wt. of at least one aromatic polycarbonate, B) 0.0 to 50.0 parts by wt. of a rubber-modified graft polymer and/or vinyl copolymer, C) 0.00 to 50.00 parts by wt. of polyester, D) 5.0 to 50.0 parts by wt. of at least one inorganic filler having a particle shape selected from the group including spherical/cubic, tabular/discus-shaped and lamellar geometries, and E) 0.00 to 5.00 parts by wt. of further conventional additives. The invention further relates to thermoplastic shaped articles having a high surface quality, high dimensional stability and high heat distortion temperature, as well as thermoplastic moulding compositions and a process for the production of the shaped articles. The present invention moreover relates to the coated finished parts produced from the thermoplastic shaped parts.
    Type: Application
    Filed: November 28, 2012
    Publication date: December 4, 2014
    Inventors: Thomas Thulke, Ulrich Grosser, Martin Döbler, Birte Sämisch, Alexander Meyer, Christoph Klinkenberg, Rafael Oser
  • Publication number: 20140329071
    Abstract: The invention relates to multilayer structures made of at least one thermoplastic material and having at least one metal layer. The invention further relates to multilayer products encompassing at least three layers comprising a substrate layer made of a substrate comprising specific copolycarbonates and at least one inorganic filler, a metal layer and one or more further layers. The invention further relates to the process for producing the said multilayer structures.
    Type: Application
    Filed: November 23, 2012
    Publication date: November 6, 2014
    Inventors: Alexander Meyer, Martin Döbler, Ulrich Grosser, Rafael Oser, Birte Sämisch, Thomas Thulke
  • Publication number: 20140243467
    Abstract: The present invention relates to a thermoplastic moulding composition composed of polycarbonate and inorganic fillers which comprises from 0.01 to 0.5 part by weight of at least one anhydride-modified alpha-olefin terpolymer and which has a high degree of rigidity and nevertheless exhibits good strength, as well as stress-strain characteristics corresponding to those of an unreinforced polycarbonate. Surprisingly, the moulding composition additionally exhibits an improvement in flame retardancy. The invention relates in particular to flame-retardant, thermoplastic moulding compositions filled with glass fibres, and to the production and use thereof. The property profile is, surprisingly, independent of the degree of interaction of the filler with the polycarbonate matrix.
    Type: Application
    Filed: September 27, 2012
    Publication date: August 28, 2014
    Applicant: Bayer Intellectual Property GmbH
    Inventors: Gesa Dern, Birte Sämisch, Tanja Cassel