Patents by Inventor Karl-Heinz Ott

Karl-Heinz Ott 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: 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: 5010135
    Abstract: Moulding compounds of fully aromatic polyesters, vinyl copolymers and grafted silicone rubber of a specified composition may be worked up into moulded products with excellent low temperature toughness and surface quality and very high resistance to stress cracking.
    Type: Grant
    Filed: June 29, 1990
    Date of Patent: April 23, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Eckel, Edgar Leitz, Dieter Wittmann, Karl-Heinz Ott, Horst Peters, Jochen Schoeps
  • Patent number: 4999420
    Abstract: This invention relates to a process for the production of aromatic polycarbonates from cyclic aromatic carbonate oligomers in the presence of aprotic organic solvents at low temperatures.
    Type: Grant
    Filed: September 14, 1989
    Date of Patent: March 12, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Edgar Leitz, Ludwig Bottenbruch, Karl-Heinz Ott, Alfred Jung, Ulrich Grigo
  • 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: 4985492
    Abstract: Thermoplastic molding compounds of polyphenylene ether, a graft polymer of resin-forming monomers on silicone rubber and, optionally, a resin-like thermoplastic, a process for their production and their use for the production of moldings.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: January 15, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dieter Wittmann, Thomas Eckel, Karl-Heinz Ott, Volker Damrath, Uwe Westeppe
  • Patent number: 4985493
    Abstract: The thermoplastic moulding compounds according to the invention obtained from aromatic polyester carbonates and special graft polymers have a very high weld-line strength as well as a high notched impact strength at room temperature and especially at low temperatures and may be used for the production of moulded articles.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: January 15, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Eckel, Dieter Wittmann, Edgar Leitz, Jochen Schoeps, Karl-Heinz Ott, Horst Peters
  • Patent number: 4968750
    Abstract: Block copolymers composed of recurrent structural units belonging to the series comprising polysiloxanes and recurring structural units belonging to the series comprising homopolymers, copolymers or terpolymers of vinyl-aromatic compounds and acrylic monomers of mixtures thereof.
    Type: Grant
    Filed: October 25, 1989
    Date of Patent: November 6, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Christian Lindner, Karl-Heinz Ott
  • Patent number: 4965300
    Abstract: Polymers having a sequential structure of the following formula--A--X--B].sub.r (I)with r=1 to 20, in which --A-- is a polymer of a cyclic carbonate, --B-- is a polymer of a lactone and --X-- is a link, with a decreasing concentration of residues of the cyclic carbonate in the --B-- direction and a decreasing concentration of residues of the lactone in the --A-- direction, and the use of the these products as molding compositions.
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: October 23, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Edgar Leitz, Karl-Heinz Ott
  • Patent number: 4960822
    Abstract: Thermoplastic moulding compounds containing(A) from 5 to 90 parts by weight of one or more thermoplastic polymers,(B) from 5 to 90 parts by weight of one or more graft polymers and(C) from 0.25 to 40 parts by weight of a copolymer having a sequential structure corresponding to the idealized formula (I)(A-X-B).sub.n (I)whereinA=a polymer of a cyclic carbonate,B=a polymer of another cyclic ester andX=a middle member containing both partial structures of A and B.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: October 2, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Edgar Leitz, Karl-Heinz Ott, Alfred Pischtschan
  • Patent number: 4960864
    Abstract: Recovery of thermoplastic polymer solids from dispersions thereof by coagulation and subsequent washing of the solids is improved by contacting the polymer in the coagulation stage or the washing stage or in both stages with at least one tricarboxylic acid of the formula ##STR1## wherein X is a single covalent bond, --CH.sub.2 -- or --C.sub.2 H.sub.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: October 2, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christian Lindner, Claus Wulff, Karl-Heinz Ott
  • Patent number: 4959418
    Abstract: Polymer powders and thermoplastic moulding materials with improved properties are obtained if graft polymers and/or resins in particle form are used and small amounts of rubber-like polymers are polymerized or graft-polymerized onto their particle surfaces.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: September 25, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christian Lindner, Karl-Heinz Ott, Dieter Wittmann, Hans-Eberhard Braese
  • Patent number: 4959410
    Abstract: Polymer mixtures having high tensile strength and good tear propagation resistance, consisting of(A) from 10 to 95 parts by weight of a graft polymer,(B) from 0 to 75 parts by weight of a thermoplastic resin component and(C) from 5 to 60 parts by weight of a copolymer having a sequence type of structure corresponding to the idealized formula (I)(A--X--B).sub.n (I)whereinA=polymer of a cyclic carbonate,B=polymer of another cyclic ester andX=middle member containing partial structures of both A and B.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: September 25, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Edgar Leitz, Karl-Heinz Ott, Christian Lindner, Lothar Meier, Otto Billinger
  • Patent number: 4956485
    Abstract: Trialkylsilyloxy-1,1-diphenyl ethylenes corresponding to general formula I, new polymers produced therewith terminated by aryl trialkylsilyl ether groups or by phenolic hydroxyl groups and a process for the production of these polymers by anionic polymerization ##STR1## in which R.sup.1, R.sup.2 =H, C.sub.1 -C.sub.4 alkyl, OCH.sub.3,R.sup.3 =H, C.sub.1 -C.sub.4 alkyl, O--C.sub.1 -C.sub.4 alkyl,R.sup.4 =H, C.sub.1 -C.sub.4 alkyl,R.sup.5 =C.sub.1 -C.sub.4 alkyl,R.sup.6 =H, C.sub.1 -C.sub.4 alkyl.
    Type: Grant
    Filed: June 16, 1989
    Date of Patent: September 11, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Edgar Leitz, Hans-Josef Buysch, Ludwig Bottenbruch, Karl-Heinz Ott
  • Patent number: 4940747
    Abstract: Thermoplastic moulding materials, of vinyl chloride polymers, which contain a polymer, prepared in the presence of mercaptans, from styrene, .alpha.-methylstyrene, vinyltoluene, acrylonitrile, methyl methacrylate or mixtures thereof and which possess improved processing properties.
    Type: Grant
    Filed: November 17, 1986
    Date of Patent: July 10, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Christian Lindner, Karl-Heinz Ott, Hans-Eberhard Braese
  • Patent number: 4920181
    Abstract: Sulphosuccinamide acids and their salts corresponding to the following general formula ##STR1## wherein X denotes the residue of a hydrophobic, optionally branched vinyloligomer having an average molecular weight M.sub.n of from 200-5,000, preferably from 300-3,000,of the groups denoted byR.sup.1 R.sup.2, one is hydrogen and the other is --SO.sub.3 M, andn represents a number with a value of from 1.4-3.0, preferably form 1.6-2.3. andM denotes hydrogen, an alkali metal, or an ammonium, C.sub.1 -C.sub.4 -alkyl-ammonium or C.sub.2 -C.sub.3 -hydroxy alkyl-ammonium group.
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: April 24, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Adolf Schmidt, Udo Hendricks, Bruno Bomer, Karl-Heinz Ott, Herbert Eichenauer, Alfred Pischtschan
  • Patent number: 4918124
    Abstract: Stabilizing mixtures, acting synergistically, of phenolic antioxidants and sulphur-containing polymers having terminal thioalkyl groups.
    Type: Grant
    Filed: November 17, 1986
    Date of Patent: April 17, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Alfred Pischtschan, Karl-Heinz Ott
  • Patent number: 4912168
    Abstract: Transparent vinyl chloride polymer molding compounds containing a sequential copolymer having the following idealized formula(A-X-B).sub.n (I)in whichA=a polymer of a cyclic carbonate,B=a polymer of another cyclic ester andX=a middle segment containing both partial structures of A and B.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: March 27, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Edgar Leitz, Karl-Heinz Ott, Lothar Meier, Maria Gartner
  • Patent number: 4912161
    Abstract: Thermoplastic moulding compounds containing(A) from 5-90 parts by weight of one or more thermoplastic polymers,(B) from 5-90 parts by weight of one or more graft polymers and(C) from 0.25-40 parts by weight of a blocked copolymer corresponding to the idealized formula (I)A - B - A; B - A - B or (A - B).sub.x (I)whereinA denotes the residue of a homopolymer, e.g. of styrene, andB denotes the residue of a homopolymer of a cyclic carbonate or lactone.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: March 27, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Edgar Leitz, Karl-Heinz Ott, Alfred Pischtschan
  • Patent number: 4908422
    Abstract: The invention relates to thermoplastic molding compounds containing(1.) thermoplastic aromatic polycarbonates and/or thermoplastic aromatic polyesters,(2.) graft polymers and, optionally,(2.a) thermoplastic copolymers,which are characterized in that they additionally contain aliphatic polycarbonates having weight average molecular weights Mw (as measured by ultracentrifugation or light scattering) in the range from 15,000 to 500,000.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: March 13, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Edgar Leitz, Herbert Eichenauer, Karl-Heinz Ott, Thomas Eckel, Horst Peters, Jochen Schoeps
  • Patent number: 4908416
    Abstract: The invention relates to mixtures containing1. thermoplastic, aromatic polycarbonates and/or thermoplastic, aromatic polyesters and2. copolymers corresponding to formula (Ia)--A--X--.sub.r (Ia) and, optionally, stabilizers, pigments, mold release agents, flameproofing agents and/or antistatic agents. The invention also relates to a process for the production of the mixtures.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: March 13, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Edgar Leitz, Herbert Eichenauer, Karl-Heinz Ott