Patents by Inventor Karl Fuhr

Karl Fuhr 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: 5741838
    Abstract: This invention relates to halogen-free flame retardant thermoplastic moulding compounds prepared from polycarbonate and graft polymer, which may contain thermoplastic copolymer and/or polyalkylene terephthalate, wherein the flame retardant used is polyphenylene oxide combined with phosphorus compounds.
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: April 21, 1998
    Assignee: Bayer AG
    Inventors: Karl Fuhr, Thomas Eckel, Dieter Wittmann, Heinrich Alberts
  • Patent number: 5658974
    Abstract: The invention relates to halogen-free, flameproofed, thermoplastic moulding compounds made from polycarbonate and graft polymers which may optionally contain a copolymer and/or polyalkylene terephthalate, wherein a silicon resin in combination with a blend of monophosphate and oligomeric polyphosphates is used as a flameproofing agent.
    Type: Grant
    Filed: October 4, 1995
    Date of Patent: August 19, 1997
    Assignee: Bayer AG
    Inventors: Karl Fuhr, Thomas Eckel, Dieter Wittmann, Heinrich Alberts
  • Patent number: 5621029
    Abstract: This invention relates to halogen-free flame retardant thermoplastic moulding compositions prepared from polycarbonate and graft polymer, which may optionally contain thermoplastic copolymer and/or polyalkylene terephthalate.The flame retardant used is a synergistic combination of silicone resin and polyphenylene oxide.
    Type: Grant
    Filed: November 24, 1995
    Date of Patent: April 15, 1997
    Assignee: Bayer AG
    Inventors: Thomas Eckel, Karl Fuhr, Dieter Wittmann, Heinrich Alberts
  • Patent number: 5272193
    Abstract: Thermoplastic polycarbonate moulding compounds containing 40 to 90 parts by weight of a thermoplastic aromatic polycarbonate; 0 to 80 parts by weight of a copolymer or polycondensate consisting of 0 to 50 parts by weight of a thermoplastic copolymer of 50 to 95% by weight of styrene, .alpha.-methylstyrene, styrene alkylated in the nucleus, halogenated styrene or mixtures thereof and 5 to 50% by weight of acrylonitrile, methacrylonitrile, alkyl acrylate, alkyl methacrylate, maleic acid anhydride, N-substituted maleiimide, vinyl acetate or mixtures thereof and/or 0 to 80 parts by weight of a thermoplastic polyalkylene terephthalate; 1 to 25 parts by weight of graft polymer prepared from 5 to 90 parts by weight of a mixture of: 50 to 95% by weight of styrene, .alpha.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: December 21, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Friedemann Muller, Karl-Heinz Ott
  • Patent number: 5240978
    Abstract: A flame resistant molding composition containing a polycarbonate resin, a graft polymer and, as a flame retarding agent a phosphoric acid ester of novolak in combination with an anti drip agent is disclosed. The composition may further contain a thermoplastic copolymer and/or polyalkylene terephthalate. A process for the preparation of the composition is also disclosed.
    Type: Grant
    Filed: May 20, 1992
    Date of Patent: August 31, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Friedemann Muller, Karl-Heinz Ott, Jochen Schoeps, Horst Peters, Werner Ballas
  • Patent number: 5191000
    Abstract: The flameproofed, non-dripping polyalkylene terephthalate molding compounds according to the invention based on phosphoric acid esters may be used for the production of moldings. The fire behavior of the polyalkylene terephthalate molding compounds is improved by the addition of certain phosphoric acid esters, a surprising reduction in the phosphorus content of the molding compounds being achieved at the same time, particularly in combination with highly heat-resistant thermoplastics.
    Type: Grant
    Filed: May 10, 1991
    Date of Patent: March 2, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Friedemann Muller, Karl-Heinz Ott
  • Patent number: 5157065
    Abstract: Thermoplastic molding compositions containing thermoplastic, aromatic polycarbonates, graft polymers, special phosphorus compounds, antidripping agents and optionally other thermoplasts as well as conventional additives are disclosed. The compositions are characterized by their flame resistance and mechanical properties. Also disclosed is a process for the preparation of the molding compositions.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: October 20, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Friedemann Muller, Karl-Heinz Ott
  • Patent number: 5137953
    Abstract: The invention relates to thermoplastic molding compounds containing thermoplastic aromatic polycarbonates, thermoplastic copolymers, optionally graft polymers and/or tetrafluoroethylene polymers and/or silicone resins, characterized in that they contain phosphorus compounds corresponding to formula (I) ##STR1## in which R is a --CH.sub.2 --, ##STR2## group and the aromatic radicals may even be alkyl-substituted.
    Type: Grant
    Filed: December 4, 1990
    Date of Patent: August 11, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Friedemann Muller, Karl-Heinz Ott, Jochen Schoeps, Horst Peters, Werner Ballas
  • Patent number: 5102931
    Abstract: The subject of the invention is flameproofed, non-dripping polyamide moulding compounds which contain specific amounts of the following:A) Phosphinic acid esters of polyphenols based on phenolaldehyde/ketone condensates,B) Anti-dripping agents (such as polyfluoroethylene polymers or aramides),C) Zinc borate,D) Thermoplastics with a predominantly aromatic main chain and a high thermal deflection temperature (Vicat B.gtoreq.180.degree. C.),and, if applicable, reinforcing agents and other additives for flameproofing and processing.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: April 7, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Friedemann Muller, Karl-Heinz Ott, Aziz El-Sayed, Peter-Rolf Muller, Martin Wandel
  • Patent number: 5100958
    Abstract: The invention relates to powder-form polymer mixtures of silicone resins (B) and thermoplastic polymers (A), to their production and to their use for the modification of thermoplatics.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: March 31, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Friedemann Muller, Karl-Heinz Ott, Ottfried Schlak, Gebhard Wagner
  • Patent number: 5047496
    Abstract: This invention relates to a process for the preparation of high molecular weight aromatic polyethersulphones from diphenols and dihalogenoaryls, characterized in that N-alkylated acid amides are used as solvents and at the same time for the azeotropic removal of the water of reaction.
    Type: Grant
    Filed: June 13, 1989
    Date of Patent: September 10, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Eckel, Karl Fuhr, Karl-Heinz Ott
  • Patent number: 5021488
    Abstract: The invention relates to flameproofed, non-dripping polyamide moulding compositions which contain certain amounts ofA) phosphinic acid esters of polyphenols based on phenol-aldehyde/ketone condensates,B) antidripping agents (such as polyfluoroethylene polymers or aramides) andC) zinc borateand if appropriate reinforcing agents and other additives for flameproofing and for processing etc.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: June 4, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Friedemann Muller, Karl-Heinz Ott, Aziz El-Sayed, Peter-Rolf Muller, Martin Wandel
  • Patent number: 4988748
    Abstract: The invention relates to thermoplastic polycarbonate molding compounds containing polycarbonates, copolymers, phosphorus compounds, tetrafluoroethylene polymers and, optionally, graft polymers and also further additives and other thermoplastics and also stabilizers, pigments, flow aids, mold release agents, antistatic agents and/or other flameproffing agents, characterized in that they contain as phosphorus compounds those corresponding to formula (I) ##STR1## and to a process for the production of the polycarbonate molding compounds.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: January 29, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Friedemann Muller, Karl-Heinz Ott, Hans-Dieter Block, Bernd Urbanneck, Werner Ballas
  • Patent number: 4837276
    Abstract: The invention relates to oligomeric and polymeric esters of difunctional polyphenylene ethers and phosphinic acids, phosphonic acids and phosphoric acid and to their use as a flame-retarding mixing component for other plastics.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: June 6, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Friedemann Muller, Karl-Heinz Ott
  • Patent number: 4632951
    Abstract: Flameproofing additives for plastics materials consisting of a coating- and carrier material. The coating consists of metal oxides, the carrier of organic compounds, in which halogen is bound to carbon. The combination of the two components of the flameproofing additives has an inhibiting action on the fire and gives plastics materials an effective fire protection according to the invention, for example, V-2 to V-0 according to UL 94.
    Type: Grant
    Filed: June 19, 1985
    Date of Patent: December 30, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Friedemann Muller, Theobald Eicher
  • Patent number: 4528307
    Abstract: This invention relates to radiation hardenable primers based on prepolymers containing (meth) acryloyl groups and conventional auxiliary agents. The primers are characterized in that they contain organic and/or inorganic fibres having a fibre length distribution curve reaching its maximum in the region of from 50 to 600 .mu.m. These primers are suitable for coating articles which have absorbent surfaces, in particular for the continuous coating of wood-concrete articles such as wood-concrete boards.
    Type: Grant
    Filed: September 15, 1983
    Date of Patent: July 9, 1985
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl Fuhr, Hans-Joachim Freier
  • Patent number: 4380604
    Abstract: A radiation-hardenable binder comprising a reaction product ester containing hydroxyl groups and hydroxyalkyl acrylates, which comprises:(A) 1 NCO gram equivalent of a polyisocyanate containing from 2 to 3 isocyanate groups per molecule; (B) from 0.4 to 1.2 OH gram equivalents of an ethylenically-unsaturated partial ester having an OH number of from 80 to 150 of an alkoxylated trimethylol propane having a degree of alkoxylation of 3 to 4.5 and acrylic acid or methacrylic acid or a mixture thereof; and (C) from 0 to 0.6 OH gram equivalents of a hydroxy alkyl acrylate or hydroxy alkyl methacrylate or a mixture thereof containing from 2 to 6 carbon atoms in the alkyl group, wherein the sum total of the OH-gram equivalents of B and C is between 1 and 1.2.Aqueous dispersions containing the binder are used for impregnating, coating, reinforcing or priming textile materials, wood, plastics, non-wovens or leather.
    Type: Grant
    Filed: November 30, 1981
    Date of Patent: April 19, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Friedrich Neuhaus, Hermann Perrey, Karl Fuhr, Hans-Joachim Freier, Otto Bendszus
  • Patent number: 4353980
    Abstract: An improved abrasion and scratch resistance and resistance to chemicals of photographic materials is achieved by applying a coating composition comprising an irradiation-hardening binder, a multifunctional acrylic monomer, optionally a diiso- or polyisocyanate and a photoinitiator to the photographic material and subsequently irradiating the coating composition with light from the ultra-violet region of the spectrum.
    Type: Grant
    Filed: November 25, 1980
    Date of Patent: October 12, 1982
    Assignee: AGFA-Gevaert AG
    Inventors: Gunter Helling, Karl Fuhr
  • Patent number: 4225695
    Abstract: A radiation-hardenable binder consisting of a reaction product of:(A) 1 gramme equivalent of NCO of a polyisocyanate containing 2 to 3 isocyanate groups per molecule,(B) 0 to 0.7 gramme equivalents of OH of a polyol containing at least 2 OH-groups per molecule, free from organically combined sulphur,(C) 0.01 to 0.7 gramme equivalents of OH of a hydroxyalkyl acrylate containing 2 to 6 carbon atoms in the alkyl group characterized in that the reaction product additionally has incorporated therein:(D) 0.01 to 0.3 gramme equivalents of OH of a polyol containing thio or dithio groups or thio and dithio groups, with at least 2 OH-groups per molecule,the sum of the OH gramme equivalents B to D is from 1 to 1.2, and the content of organically combined sulphur, derived from the thio and dithio groups, is from 0.01 to 10% by weight, based on the binder.
    Type: Grant
    Filed: August 15, 1978
    Date of Patent: September 30, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Ernst Schuster, Hans J. Rosenkranz, Hans Rudolph, Karl Fuhr, Bruno Zorn, Harro Traubel
  • Patent number: 4179478
    Abstract: An improved process for the production of lacquer binders from 1,2-polyepoxides having more than one 1,2-epoxide group per molecule, comprising the steps of:(a) reacting the 1,2-polyepoxide with from 0.01 to 0.6 NH-equivalents, based on one epoxide equivalent, of an optionally substituted active amine hydrogen containing ammonium carbonic acid salt;(b) reacting the thus obtained compound with from 0.40 to 0.90 carboxyl equivalent, based on on epoxide equivalent of acrylic acid, methacrylic acid or a mixture thereof; and optionally(c) reacting the compound obtained from step (b) with from 0.40 to 0.2 carboxyl equivalents, based on one epoxide group, or a saturated aliphatic monocarboxylic acid;so that at least 80% of the epoxide groups originally present are reacted.
    Type: Grant
    Filed: June 13, 1978
    Date of Patent: December 18, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans J. Rosenkranz, Hans-Joachim Traenckner, Karl Fuhr