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: 4906688
    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 linear aliphatic polycarbonate.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: March 6, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Fichenauer, Edgar Leitz, Karl-Heinz Ott, Alfred Pischtschan
  • Patent number: 4902745
    Abstract: Soft polymer mixtures of(a) 10 to 50 parts by weight of a graft polymer obtained from a particulate, highly cross linked diene or alkyl acrylate rubber and graft polymerized alkyl methacylate, acrylonitrile, styrene, alkyl acrylate or mixtures thereof and(b) 90 to 50 parts by weight of a partly cross-linked, particulate, rubber-like copolymer of acrylonitrile and/or methyl methacrylate and C.sub.1 to C.sub.8 alkyl acrylate having a gel content of from 60 to 99% by weight and an average particle diameter (d.sub.50) of from 0.1 to 0.6 .mu.m,and a process for the preparation of the mixtures and their use for the production of moulded articles.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: February 20, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Erwin Piejko, Otto Billinger, Lothar Meier, Christian Lindner, Karl-Heinz Ott
  • Patent number: 4900797
    Abstract: The invention relates to thermoplastic polycarbonate mixtures containing aromatic polycarbonates and aliphatic polycarbonates 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 polycarbonate mixtures.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: February 13, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Edgar Leitz, Herbert Eichenauer, Karl-Heinz Ott
  • Patent number: 4900785
    Abstract: The invention relates to thermoplastic molding compounds containing1. thermoplastic aromatic polycarbonates and/or thermoplastic aromatic polyesters,2. graft polymers,3. special copolymers corresponding to formula (Ia)[A-X-B].sub.r (Ia)and, optionally,2a. thermoplastic copolymers, stabilizers, pigments, mold release agents, flameproofing agents and/or antistatic agents.The invention also relates to a process for the production of the molding compounds.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: February 13, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Edgar Leitz, Herbert Eichenauer, Karl-Heinz Ott, Horst Peters, Jochen Schoeps
  • Patent number: 4895898
    Abstract: The present invention relates to thermoplastic moulding materials containing thermoplastic polycarbonates, graft polymers and two different copolymers and, if appropriate, customary amounts of fire-retarding agents, stabilizers, pigments, mould release agents and/or antistatic agents, and to a process for the preparation of these moulding materials.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: January 23, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Jurgen Kress, Herbert Eichenauer, Horst Peters, Jochen Schoeps, Karl-Heinz Ott
  • Patent number: 4885337
    Abstract: Process for the preparation of a thermoplastic moulding composition of 10 to 65% by weight of at least one graft polymer which is obtainable by emulsion polymerization of styrene and acrylonitrile in a weight ratio of 90:10 to 50:50, it being possible for all or some of the styrene to be replaced by .alpha.-methylstyrene or methyl methacrylate, in the presence of at least one rubber base, and the weight ratio of monomers employed to rubber polymer employed being 20:80 to 70:30, and 90 to 35% by weight of a copolymer of styrene and acrylonitrile in a weight ratio of 90:10 to 50:50, it being possible for all or some of the styrene to be replaced by .alpha.-methylstyrene or methyl methacrylate, wherein, to prepare the graft polymer, the grafting monomers and 0.05 to 1.00 part by weight (per 100 parts by weight of grafting monomer) of a mercaptan are added stepwise to the latex of the rubber base over a period of time, the part amount of the monomer added in each time interval .DELTA.t.sub.n+1 being 0.30 to 0.
    Type: Grant
    Filed: July 6, 1987
    Date of Patent: December 5, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Alfred Pischtschan, Karl-Heinz Ott
  • Patent number: 4873289
    Abstract: The invention relates to new graft polymers based on elastomers as the graft base and grafted-on vinyl monomers, their preparation and blend thereof with polyamides.
    Type: Grant
    Filed: September 15, 1988
    Date of Patent: October 10, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christian Lindner, Dieter Wittmann, Ludwig Trabert, Carlhans Suling, Herbert Bartl, Karl-Heinz Ott
  • Patent number: 4866123
    Abstract: Molding compositions of polycarbonate, polyalkylene terephthalate and special graft polymer show high joint line strength and high toughness at low temperatures.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: September 12, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dieter Wittmann, Hans-Jurgen Kress, Karl-Heinz Ott, Christian Lindner
  • Patent number: 4859744
    Abstract: The invention relates to a process for the production of graft polymers of resin-forming monomers on a rubber in which a very high graft yield is obtained by the use of an initiator system of an organic hydroperoxie and ascorbic acid. The graft polymers obtained are suitable as thermoplastic molding compositions or as constituents thereof.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: August 22, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christian Lindner, Karl-Heinz Ott
  • Patent number: 4857591
    Abstract: Thermoplastic moulding compositions consisting ofI. 75 to 99.5% by weight of a polymer ofA. 0 to 95% by weight, 95% or less by weight; of a graft copolymer prepared by grafting polymerization ofA.1 5 to 95% by weight of a mixture ofA.1.1 50 to 95% by weight of styrene, .alpha.-methylstyrene, nuclear-substituted styrene, methyl methacrylate or mixtures thereof andA.1.2 50 to 5% by weight of (meth)acrylonitrile, methyl methacrylate, maleic anhydride, N-substituted maleimide or mixtures thereof onA.2 95 to 5% by weight of a rubber with a glass transition temperature Tg or <0.degree.C., andB. 100 to 5% by weight of a thermoplastic polymer ofB.1 95 to 50% by weight of styrene, .alpha.-methylstyrene, nuclear-substituted styrene or methyl methacrylate or mixtures thereof andB.2 5 to 50% by weight of (meth)acrylonitrile, methyl methacrylate, maleic anhydride, N-substituted maleimide or mixtures thereof andII. 25 to 0.5% by weight of a hydrogenated nitrile rubber.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: August 15, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Hartmuth Buding, Joachim Doring, Rudolf Casper, Karl-Heinz Ott
  • Patent number: 4853450
    Abstract: The invention relates to a latex of an .alpha.-methylstyrene/acrylonitrile/methacrylamide terpolyer which shows excellent stability to stirring.
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: August 1, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ulrich Jansen, Karl-Heinz Ott
  • 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: 4826946
    Abstract: Multi-block copolymers of recurring structural units of polysiloxanes and recurring structural units of aliphatic polyesters, polyethers or polyetheresters with rubber properties, the individual polymeric blocks constituting rubber-type products with glass transition temperatures below practical usefulness and a process for their production.
    Type: Grant
    Filed: June 4, 1987
    Date of Patent: May 2, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Christian Lindner, Karl-Heinz Ott, Peter Orth, Hartwig Hocker
  • Patent number: 4785050
    Abstract: Readily processable moulding materials with improved impact strength of polyamides and graft products which have a particular chemical and physical structure.
    Type: Grant
    Filed: September 15, 1986
    Date of Patent: November 15, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dieter Wittmann, Christian Lindner, Ludwig Trabert, Rudolf Binsack, Karl-Heinz Ott
  • Patent number: 4778850
    Abstract: A: Thermoplastic moulding materials made from a vinyl chloride homopolymer or copolymer containing at least 50% by weight of vinyl choloride units,B: a graft polymer, prepared by graft polymerization ofB1: 50 to 85 parts by weight of a mixture of at least two of the monomers styrene, acrylonitrile, methyl methacrylate and .alpha.-methyl styrene onB2: 50 to 15 parts by weight of an at least partially crosslinked butadiene or acrylate rubber having average particle diameters of 0.08 to 1 .mu.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: October 18, 1988
    Assignee: Bayer Aktiengessellschaft
    Inventors: Christian Lindner, Hartmuth Buding, Hans-Eberhard Braese, Rudolf Casper, Karl-Heinz Ott
  • Patent number: 4772668
    Abstract: Sulphur-containing elastic-thermoplastic graft products of styrene, .alpha.-methyl styrene, p-methyl styrene, vinyl toluene, acrylonitrile or methyl methacrylate or mixtures thereof on a particle-like rubber with an average particle diameter (d.sub.50) of from 0.05 to 20.0 .mu.m and a glass temperature .ltoreq.10.degree. C. with a total rubber content of from 1 to 80% by weight, whereby the graft products have a sulphur content of from 1.15 to 3.95% by weight and the thermoplast proportion of the polymerized monomers on the particle-like rubber has a limiting viscosity of from 2 to 15 ml/g (measured in dimethyl formamide at 25.degree. C.) and in which at least 90% by weight of the incorporated sulphur is present as a constituent of terminal C1-18-thioalkyl groups.
    Type: Grant
    Filed: February 10, 1986
    Date of Patent: September 20, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Alfred Pischtschan, Karl-Heinz Ott
  • Patent number: 4771109
    Abstract: Graft polymers of vinyl monomers or vinyl monomer mixtures on block copolymers of recurring structural units from the polysiloxane series and recurring structural units from the series comprising homo- and copolymers of conjugated dienes as grafting bases.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: September 13, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Christian Lindner, Karl-Heinz Ott
  • Patent number: 4769417
    Abstract: The invention relates to new block copolymers consisting of recurring polysiloxane blocks and recurring conjugated diene homo-or copolymer blocks with particularly good rubber properties, in particular at low temperatures.
    Type: Grant
    Filed: May 12, 1987
    Date of Patent: September 6, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Christian Lindner, Karl-Heinz Ott, Hartwig Hocker
  • Patent number: 4764557
    Abstract: Elastic-thermoplastic and thermoplastic powder-form moulding compositions of uniform particle size and improved thermal stability at made by incorporating a sulphur containing polymer.
    Type: Grant
    Filed: February 10, 1986
    Date of Patent: August 16, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Alfred Pischtschan, Karl-Heinz Ott
  • Patent number: 4755564
    Abstract: This invention relates to graft polymers produced from:(1) an elastomer component having glass transition temperatures below 0.degree. C. as the graft base; and(2) graft monomers corresponding to the following general formula: ##STR1## wherein R.sup.1 represents H or a C.sub.1 -C.sub.4 alkyl radical;R.sup.3 represents H, phenyl or a C.sub.1 -C.sub.8 alkyl radical;R.sup.2 represents H, a C.sub.1 -C.sub.10 alkyl or C.sub.6 -C.sub.12 aryl radical or --OR.sup.4 ; andR.sup.4 represents C.sub.1 -C.sub.8 alkyl or C.sub.6 -C.sub.12 aryl optionally substituted by alkyl groups, O-containing or N-containing groups;X represents a single bond, a C.sub.1 -C.sub.10 alkylene or C.sub.6 -C.sub.12 arylene radical, ##STR2## Y represents --O--Z--, --NH--Z--; and Z represents a C.sub.1 -C.sub.10 alkylene or C.sub.6 -C.sub.12 arylene radical;and, optionally, other olefinically unsaturated monomers.
    Type: Grant
    Filed: November 18, 1985
    Date of Patent: July 5, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christian Lindner, Ludwig Trabert, Herbert Bartl, Karl-Heinz Ott