Patents by Inventor Ralf Hufen

Ralf Hufen 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: 12024628
    Abstract: The invention relates to a thermoplastic composition comprising A) aromatic polycarbonate, B) 0.1 to 5 wt.-% one or more polyether polyol(s) and C) one or more thermal stabilizer(s) selected from the group consisting of thio compounds excluding the following component D, characterized in that the composition additionally comprises D) 3,3?-thiodipropionic acid, wherein the total amount of components C plus D is 0.01 to 1.0 wt.-%. The invention also relates to medical technology products or parts of medical technology products consisting of such compositions as well as to a process for sterilization of such moulded parts by means of irradiation. The polycarbonate compositions according to the invention show significantly less yellowing after irradiation than known compositions.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: July 2, 2024
    Assignee: Covestro Intellectual Property GmbH & Co. KG
    Inventors: Derk Erich Wandner, Pierre Moulinie, Ralf Hufen
  • Publication number: 20240052158
    Abstract: The present invention relates to a composition for producing a thermoplastic molding compound, the composition comprising the following constituents or consisting therefrom: A) at least one polymer selected from the group consisting of polycarbonate and polyester carbonate, B) at least one polyester, C) phosphorous acid, D) at least one phosphonite, and E) at least one sterically hindered phenol. Furthermore, the present invention relates to a method for producing a thermoplastic molding compound from the composition, to the molding compound itself, and to the use of the composition and the molding compound for producing molding bodies.
    Type: Application
    Filed: February 1, 2022
    Publication date: February 15, 2024
    Inventors: Ralf Hufen, Sven Hobeika, Marius Nolte
  • Patent number: 11680164
    Abstract: The invention relates to a thermoplastic composition comprising A) aromatic polycarbonate, B) 0.1 to 5 wt.-% one or more polyether polyols and C) 0.01 to 0.30 wt.-% 3,3?-thiodipropionic acid. The invention also relates to medical technology products or parts of medical technology products consisting of such compositions as well as to a process for sterilization of such moulded parts by means of irradiation. The polycarbonate compositions according to the invention show significantly less yellowing after irradiation than known compositions and still have good mechanical properties.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: June 20, 2023
    Assignee: Covestro Intellectual Property GmbH & Co. KG
    Inventors: Derk Erich Wandner, Pierre Moulinie, Ralf Hufen
  • Patent number: 11559951
    Abstract: The invention relates to a composite component that has improved bonding properties and includes a substrate (i) made of a thermoplastic polymer blend composition, and a coating (ii); in a layer located 5 to 10 ?m below the boundary surface between the substrate (i) and the coating (ii), the substrate (i) has a dispersed, non-lamellar phase structure. The invention also relates to a method for manufacturing the composite component.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: January 24, 2023
    Assignee: Covestro Deutschland AG
    Inventors: Andreas Seidel, Sven Hobeika, Ralf Hufen
  • Publication number: 20230020300
    Abstract: The present invention relates to a molding compound containing A) 45 to 65 wt. % of at least one aromatic polycarbonate, polyester carbonate or mixtures thereof, B) 18 to 31 wt. % of at least one polybutylene terephthalate having rheological properties of 5 g/10 min to 30 g/10 min determined according to DIN EN ISO 1133 at 250° C. measuring temperature and a load of 2.16 kg, C) 3 to 10 wt % of at least one rubber-modified graft polymer with a graft base consisting of a silicone-acrylate composite rubber and a silicone rubber content of 20 to 60 wt. % relative to the graft base, D) 8 to 13 wt. % of at least one phosphazene, and E) 0 to 8.0 wt. % of at least one polymer additive, the weight ratio of components D to C) being in the range of 1.3:1 to 2.5:1. The invention also relates to a method for producing the molding compound, to the use of the molding compound for producing moldings and to the moldings as such.
    Type: Application
    Filed: November 20, 2020
    Publication date: January 19, 2023
    Inventors: Ralf Hufen, Marius Nolte
  • Publication number: 20220371309
    Abstract: The present invention relates to a layered composite comprising a poly carbonate-based matrix, possibly containing fibres, and an outer layer of special poly carbonate-polyester blends, and also to a layered composite such as that described above and provided with painting on that side of its outer layer which is facing away from the matrix, to a method for producing these composites and also to their use for the production for example of automobile add-on parts.
    Type: Application
    Filed: October 28, 2020
    Publication date: November 24, 2022
    Inventors: Christopher SCHIRWITZ, Matthias KNAUPP, Marius NOLTE, Ralf HUFEN, Dirk HINZMANN, Sven SIEGEMUND, Uwe KLIPPERT
  • Publication number: 20220315755
    Abstract: The invention relates to a composition containing A) 60 to 80 wt. % of a polyester on the basis of terephthalic acid and at least one dianhydrohexitol and optionally additional diols, B) 10 to 30 wt. % of a polyester on the basis of succinic acid and at least one aliphatic, araliphatic or cycloaliphatic diol, and C) 3 to 12 wt. % of at least one mineral reinforcing material on the basis of talcum. The invention also relates to a method for producing a molding compound from the composition, to the molding compound itself and to moldings obtainable from the composition or the molding compound.
    Type: Application
    Filed: June 17, 2020
    Publication date: October 6, 2022
    Inventors: Marius Nolte, Ralf Hufen
  • Publication number: 20210403705
    Abstract: The invention relates to a composition for production of a thermoplastic moulding compound, wherein the composition comprises or consists of at least the following constituents: A) 50.0% to 95.0% by weight of at least one polymer selected from the group consisting of aromatic polycarbonate, aromatic polyestercarbonate and aromatic polyester, B) 1.0% to 40.0% by weight of polymer free of epoxy groups, consisting of B1) rubber-modified graft polymer, prepared by emulsion polymerization and B2) optionally rubber-free vinyl (co)polymer, C) 0.1% to 7.5% by weight of a polymer containing structural elements that derive from styrene and an epoxy-containing vinyl monomer, D) 1.0% to 20.0% by weight of phosphorus-containing flame retardant, E) 0.1% to 10.0% by weight of additives, and F) 0% to 10.0% by weight of one or more fillers, where component C) has a weight ratio of structural elements that derive from styrene to those that derive from epoxy-containing vinyl monomers of 100:1 to 1:1.
    Type: Application
    Filed: June 22, 2018
    Publication date: December 30, 2021
    Inventors: Thomas Eckel, Sven Hobeika, Ralf Hufen, Andreas Seidel, Burkhard Thuermer
  • Publication number: 20210332234
    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) 30% to 90% by weight of at least one polymer selected from the group consisting of aromatic polycarbonate, aromatic polyester carbonate and aromatic polyester, B) 5% to 65% by weight of rubber-modified vinyl (co)polymer prepared by the bulk polymerization method which is free of epoxy groups, C) 0.
    Type: Application
    Filed: December 22, 2017
    Publication date: October 28, 2021
    Inventors: Andreas Seidel, Sven HOBEIKA, Ralf HUFEN, Thomas ECKEL
  • Publication number: 20210317263
    Abstract: The invention relates to a composition for producing a thermoplastic moulding compound, wherein the composition contains the following constituents or consists of same: A) between 50 and 70 wt. % of at least one aromatic polycarbonate, B) between 16 and 40 wt. % of at least one polyalkylene terephthalate, C) between 8 and 22 wt. % of at least one mineral filler based on talc, D) between 0.0110 and 0.0280 wt. % of phosphorous acid, and E) between 0 and 8.0 wt. % of at least one additive. Furthermore, the invention relates to a method for producing a thermoplastic moulding compound from the composition, to the moulding compound itself, and to the use of the composition and the moulding compound for producing moulding bodies.
    Type: Application
    Filed: August 6, 2019
    Publication date: October 14, 2021
    Inventors: Ralf Hufen, Achim Feldermann, Marius Nolte
  • Patent number: 11111380
    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) at least one polymer selected from the group consisting of aromatic polycarbonate, aromatic polyester carbonate and aromatic polyester, B) polymer free of epoxy groups, consisting of B.1) rubber-modified vinyl (co)polymer prepared by the emulsion polymerization method and B.2) optionally, a rubber-free vinyl (co)polymer, C) a block or graft polymer comprising structural elements deriving from styrene and at least one epoxy-comprising vinyl monomer, D) one or more further additives, and to a process for producing a moulding compound from the composition, to the moulding compound itself, to the use of the composition or the moulding compound for production of mouldings, and to the mouldings themselves.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: September 7, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Andreas Seidel, Sven Hobeika, Ralf Hufen, Thomas Eckel
  • Patent number: 11104797
    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) 30% to 90% by weight of at least one polymer selected from the group consisting of aromatic polycarbonate, aromatic polyester carbonate and aromatic polyester, B) 5% to 65% by weight of polymer free of epoxy groups, consisting of B1) rubber-modified vinyl (co)polymer prepared by the emulsion polymerization method using a redox initiator system consisting of an organic oxidizing agent and a reducing agent and B2) optionally rubber-free vinyl (co)polymer, C) 0.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: August 31, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Andreas Seidel, Sven Hobeika, Ralf Hufen, Thomas Eckel
  • Publication number: 20210179845
    Abstract: The invention relates to a thermoplastic composition comprising A) aromatic polycarbonate, B) 0.1 to 5 wt.-% one or more polyether polyols and C) 0.01 to 0.30 wt.-% 3,3?-thiodipropionic acid. The invention also relates to medical technology products or parts of medical technology products consisting of such compositions as well as to a process for sterilization of such moulded parts by means of irradiation. The polycarbonate compositions according to the invention show significantly less yellowing after irradiation than known compositions and still have good mechanical properties.
    Type: Application
    Filed: April 12, 2019
    Publication date: June 17, 2021
    Inventors: Derk Erich WANDNER, Pierre MOULINIE, Ralf HUFEN
  • Publication number: 20210139697
    Abstract: The invention relates to a thermoplastic composition comprising A) aromatic polycarbonate, B) 0.1 to 5 wt.-% one or more polyether polyol(s) and C) one or more thermal stabilizer(s) selected from the group consisting of thio compounds excluding the following component D, characterized in that the composition additionally comprises D) 3,3?-thiodipropionic acid, wherein the total amount of components C plus D is 0.01 to 1.0 wt.-%. The invention also relates to medical technology products or parts of medical technology products consisting of such compositions as well as to a process for sterilization of such moulded parts by means of irradiation. The polycarbonate compositions according to the invention show significantly less yellowing after irradiation than known compositions.
    Type: Application
    Filed: April 12, 2019
    Publication date: May 13, 2021
    Inventors: Derk Erich WANDNER, Pierre MOULINIE, Ralf HUFEN
  • Patent number: 10934429
    Abstract: Compositions are provided comprising A) at least one polymer selected from the group consisting of aromatic polycarbonate and aromatic polyester carbonate, B) at least one mixture comprising at least one butadiene-based graft polymer prepared by emulsion, suspension or solution polymerization and at least one polybutadiene-free vinyl (co)polymer, and C) at least one polymer additive, where the polybutadiene content based on the sum total of the parts by weight of components A and B is 10% to 20% by weight, and where the total content of butadiene-free vinyl (co)polymer from component B based on the sum total of the parts by weight of components A and B is 12% to 23% by weight. Composite components formed from these compositions and a polyurethane layer, which are notable for improved adhesion between the two layers, and a process for producing the composite components are also provided.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: March 2, 2021
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Ralf Hufen, Thomas Eckel, Sven Hobeika, Timo Kuhlmann, Johannes Scherer
  • Publication number: 20210047512
    Abstract: A composition for production of a thermoplastic moulding compound, wherein the composition comprises the following constituents: A) 45.0% to 95.0% by weight of at least one polymer selected from the group consisting of aromatic polycarbonate, aromatic polyestercarbonate and aromatic polyester, B) 1.0% to 35.0% by weight of polymer free of epoxy groups, consisting of B1) rubber-modified graft polymer and B2) optionally rubber-free vinyl (co)polymer, C) 0.1% to 10.0% by weight of a polymer comprising structural elements that derive from styrene and an epoxy-comprising vinyl monomer, D) 1.0% to 20.0% by weight of phosphorus-comprising flame retardant, E) 1.0% to 35.0% by weight of filler, and F) 0.1% to 10.0% by weight of additives, wherein component C has a weight ratio of structural elements that derive from styrene to those that derive from epoxy-comprising vinyl monomers of 100:1 to 1:1. Related processes, compounds, and moulded articles are also provided.
    Type: Application
    Filed: June 22, 2018
    Publication date: February 18, 2021
    Inventors: Thomas Eckel, Sven Hobeika, Ralf Hufen, Andreas Seidel, Burkhard Thuermer
  • Patent number: 10899909
    Abstract: The invention relates to compositions containing (A) at least one polymer selected from the groups of aromatic polycarbonates and aromatic polyester carbonates and (B) at least one Bronsted-acidic compound, such as ethylenediaminetetraacetic acid (EDTA), and also relates to a process for producing compositions using components (A), (B) and optionally further components, wherein at least one of the employed components is alkaline or contains alkaline constituents, to compositions obtained by this process and to the use of the compositions for producing molded articles and to the molded articles themselves.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: January 26, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Andreas Seidel, Ralf Hufen, Hans-Jürgen Thiem
  • Patent number: 10844182
    Abstract: The invention relates to a compounding method for producing impact-modified polycarbonate compositions using components acting as an alkali or using alkaline constituent-containing components. By using the method according to the invention, the harmful influence of the components acting as an alkali on the properties of polycarbonate molding compositions or the surface of molded bodies produced therefrom is counteracted. The method has the steps (i), (ii), and optionally (iii), wherein (i) in a first step A) 10 to 98 wt. % of at least one polymer selected from the group of aromatic polycarbonates and aromatic polyester carbonates, B) 0.001 to 0.3 wt. % of at least one organic Brønsted acid, i.e. a carbon and hydrogen-containing Brønsted acid, C) 0.0001 to 0.008 wt. % of at least one inorganic Brønsted acidic phosphorus compound, i.e. a Brønsted acidic phosphorus compound which does not contain carbon, D) 1 to 90 wt. % of at least one rubber-containing vinyl(co)polymerisate, E) 0 to 90 wt.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: November 24, 2020
    Assignee: Covestro Deutschland AG
    Inventors: Andreas Seidel, Ralf Hufen, Hans-Jürgen Thiem, Joachim Simon
  • Publication number: 20200308397
    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) at least one polymer selected from the group consisting of aromatic polycarbonate, aromatic polyester carbonate and aromatic polyester, B) polymer free of epoxy groups, consisting of B.1) rubber-modified vinyl (co)polymer prepared by the emulsion polymerization method and B.2) optionally, a rubber-free vinyl (co)polymer, C) a block or graft polymer comprising structural elements deriving from styrene and at least one epoxy-comprising vinyl monomer, D) one or more further additives, and to a process for producing a moulding compound from the composition, to the moulding compound itself, to the use of the composition or the moulding compound for production of mouldings, and to the mouldings themselves.
    Type: Application
    Filed: December 22, 2017
    Publication date: October 1, 2020
    Inventors: Andreas Seidel, Sven Hobeika, Ralf Hufen, Thomas Eckel
  • Publication number: 20200270451
    Abstract: The invention relates to a composition for production of a thermoplastic moulding compound, wherein the composition comprises or consists of at least the following constituents: A) 50.0% to 95.0% by weight of at least one polymer selected from the group consisting of aromatic polycarbonate, aromatic polyestercarbonate and aromatic polyester, B) 1.0% to 35.0% by weight of at least one polymer free of epoxy groups, consisting of B1) a rubber-modified graft polymer having an elastomeric acrylate rubber graft base, B2) optionally a rubber-modified graft polymer based on vinylaromatics, ring-substituted vinylaromatics and/or (C1-C8)-alkyl methacrylates and having a different graft base from component B1), and B3) optionally a rubber-free vinyl (co)polymer, C) 0.1% to 10.0% by weight of a polymer containing structural elements that derive from styrene and an epoxy-containing vinyl monomer, D) 1.0% to 20.0% by weight of phosphorus-containing flame retardant, and E) 0.1% to 20.
    Type: Application
    Filed: June 22, 2018
    Publication date: August 27, 2020
    Inventors: Thomas Eckel, Sven Hobeika, Ralf Hufen, Andreas Seidel, Burkhard Thuermer