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).

  • Process for the preparation of linear aliphatic polycarbonate from cyclic aliphatic carbonate
    Patent number: 4754017
    Abstract: Process for the polymerization of cyclic aliphatic carbonates in the presence of aprotic organic solvents with exclusion of atmospheric oxygen and atmospheric moisture, wherein organometallic compounds of elements of main group 1 of the periodic table are used as initiators, the monomer/solvent ratio is in the range from 1 part by weight to 50 parts by weight of monomer per 100 parts by weight of solvent and the polymerization temperature is between -100.degree. C. and +20.degree. C.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: June 28, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Edgar Leitz, Christian Lindner, Herbert Eichenauer, Karl-Heinz Ott, Hans-Josef Buysch, Peter Mues, Hartwig Hocker, Helmut Keul
  • Thermoplastics moulding compositions based on polysiloxane/polycarbonate block copolymers
    Patent number: 4746701
    Abstract: The present invention relates to thermoplastic moulding compositions containing (A) 20 to 80 parts by weight of a polydiorganosiloxane/polycarbonate block copolymer, (B) 70 to 5 parts by weight of a graft polymer in particle form and (C) 5 to 60 parts by weight of a rubber-free, thermoplastic vinyl polymer, the total of parts by weight of components (A)+(B)+(C) being in each case 100 parts by weight, and, if appropriate, other known additives.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: May 24, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Jurgen Kress, Winfried Paul, Horst Peters, Jochen Schoeps, Karl-Heinz Ott
  • Thermoplastic moulding compositions based on polyphenylene oxide/polycarbonate block condensates
    Patent number: 4740554
    Abstract: The present invention provides moulding compositions consisting of polyphenylene oxide/polycarbonate block condensates, graft polymers and, where appropriate, co-polymers. These moulding compositions can contain further suitable additives. The present invention also provides a process for preparing the moulding compositions according to the invention.
    Type: Grant
    Filed: November 10, 1986
    Date of Patent: April 26, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Jurgen Kress, Peter Tacke, Dieter Freitag, Karl-Heinz Ott
  • Sulphur-containing polymers
    Patent number: 4740573
    Abstract: Sulphur-containing polymers of styrene, .alpha.-methyl styrene, p-methyl styrene, vinyl toluene, acrylonitrile or methyl methacrylate or mixtures thereof with a limiting viscosity of from 2 to 15 ml/g (measured in dimethyl formamide at 25.degree. C.) and a sulphur content of from 1.15 to 3.95% by weight, whereby at least 90% by weight of the incorporated sulphur is present as a constituent of terminal C.sub.1-18 -thioalkyl groups.
    Type: Grant
    Filed: February 10, 1986
    Date of Patent: April 26, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Alfred Pischtschan, Karl-Heinz Ott
  • Polysiloxane block copolymers
    Patent number: 4699967
    Abstract: Block copolymers of recurring structural units of the series of polysiloxanes and recurring structural units of the series of aliphatic polyesters, polyethers or polyetheresters with rubber properties, the polymeric block-forming polymers in each case producing rubber-type products with glass transition temperatures below practical temperatures of use and a process for the production thereof.
    Type: Grant
    Filed: January 21, 1986
    Date of Patent: October 13, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Christian Lindner, Karl-Heinz Ott, Peter Orth, Hartwig Hocker
  • Thermoplastic moulding compositions consisting of polycarbonates, graft polymers and copolymers
    Patent number: 4683265
    Abstract: The present invention relates to thermoplastic moulding compositions consisting of polycarbonates, graft polymers and copolymers, which are characterized in that they contain special graft polymers and/or special copolymers, with the result that these moulding compositions possess a very homogeneous rubber distribution and furthermore possess very good toughness and heat stability and substantially improved heat distortion resistance.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: July 28, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Jurgen Kress, Christian Lindner, Leo Morbitzer, Horst Peters, Karl-Heinz Ott, Jochen Schoeps
  • Graft polymers having a mat surface
    Patent number: 4668737
    Abstract: A graft product of from 40 to 99.8 parts by weight of styrene, .alpha.-methyl styrene, p-methyl styrene, vinyl toluene, methyl methacrylate or mixtures thereof, from 20 to 0.1 part by weight of a vinyl-group-containing, preferably heterocyclic nitrogen base, from 20 to 0.1 part by weight of a mono- or di-acid containing a polymerizable double bond and from 0 to 49 parts by weight of acrylonitrile on a particulate rubber having an average particle diameter (d.sub.50) of from 0.05 to 20.0 .mu.m and a glass temperature of .ltoreq.10.degree. C., the total rubber content amounting to between 5 and 80% by weight.
    Type: Grant
    Filed: May 30, 1985
    Date of Patent: May 26, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Karl Zabrocki, Joachim D/o/ ring, Karl-Heinz Ott, Ludwig Bottenbruch
  • Thermoplastic moulding compositions based on polyalkylene terephthalate and polymer and a process for the production thereof
    Patent number: 4666972
    Abstract: Polyalkylene terephthalates which contain a fluorinated polyolefin in addition to a polymer having a glass transition temperature of less than -30.degree. C., are very tough, exhibit good stability to thermal shaping and hardness, and have a high modulus of elasticity and improved stress/strain behavior.
    Type: Grant
    Filed: June 11, 1985
    Date of Patent: May 19, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinz Kohler, Christian Lindner, Dieter Rempel, Gunter Weber, Karl-Heinz Ott, Rudolph Binsack
  • Transparent moulding compositions
    Patent number: 4666980
    Abstract: This invention provides thermoplastic moulding moulding compositions with good dimensional stability under heat and transparency consisting of particular graft polymers and optionally thermoplastic polymer resins.
    Type: Grant
    Filed: June 26, 1985
    Date of Patent: May 19, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christian Lindner, Karl-Heinz Ott, Walter Uerdingen, Hans-Eberhard Braese, Hans-Jurgen Kress
  • Moulding compositions of vinyl chloride polymers, graft polymers and polymeric plasticizers having a high resistance to ageing
    Patent number: 4657976
    Abstract: This invention relates to thermoplastic moulding compositions of vinyl chloride polymers, certain graft polymers, certain resin-like copolymer additives and certain rubber-like copolymers for the production of films having improved resistance to ageing.
    Type: Grant
    Filed: July 25, 1983
    Date of Patent: April 14, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinz Ott, Christian Lindner, Walter Uerdingen, Hans-Eberhard Braese, Helmut Hurnik
  • Thermoplastic moulding compositions based on polyalkylene terephthalate, polycarbonate and additional polymer and a process for the production thereof
    Patent number: 4656227
    Abstract: Moulding compositions based on polyalkylene terephthalate, polycarbonate, polymer and fluorinated polyolefin have higher Vicat-softening temperature if the polymer and the fluorinated polyolefin are precipitated together from a mixture of the dispersions of both components.
    Type: Grant
    Filed: May 8, 1985
    Date of Patent: April 7, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christian Lindner, Karl-Heinz Ott, Werner Nouvertne, Peter R. Muller
  • Mat moulding materials
    Patent number: 4652614
    Abstract: The invention relates to moulding materials which have a mat surface and are based on neutral and acid graft polymers.
    Type: Grant
    Filed: February 15, 1985
    Date of Patent: March 24, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Joachim Doring, Karl-Heinz Ott, Ludwig Bottenbruch
  • Process for the preparation of flame-resistant polycarbonate moulding compositions containing tetrafluoroethylene polymers
    Patent number: 4649168
    Abstract: The present invention relates to a process for the preparation of flame-resistant polycarbonate moulding compositions, which is characterized in that, besides the addition of alkali metal salts, there is incorporation of tetrafluoroethylene polymers as an intimate mixture with halogen-free graft polymers, these intimate mixtures being prepared by coagulation of the appropriate emulsion mixtures, and to the polycarbonate moulding compositions obtainable by the process according to the invention.
    Type: Grant
    Filed: November 13, 1985
    Date of Patent: March 10, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Jurgen Kress, Ludwig Bottenbruch, Mark Witman, Klaus Kircher, Christian Lindner, Karl-Heinz Ott
  • Molding materials processed to be free from salts
    Patent number: 4647652
    Abstract: The invention relates to elastic-thermoplastic and thermoplastic pulverulent moulding materials and to mixtures thereof, which can be processed as thermoplastics, with elastic moulding materials, which are prepared from the corresponding aqueous latices under salt-free conditions using a purely organic precipitating agent system.
    Type: Grant
    Filed: April 15, 1986
    Date of Patent: March 3, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Karl-Heinz Ott
  • Thermoplastic moulding compositions
    Patent number: 4639473
    Abstract: Thermoplastic, high-impact moulding compositions of (A) 5 to 80 parts by weight of a graft product of 70 to 30% by weight of a mixture of an aromatic vinyl compound and acrylonitrile and/or methacrylonitrile on 30 to 70% by weight of a rubber having a glass transition temperature of below -10.degree. as the graft base and (B) 20 to 95 parts by weight of a terpolymer of styrene and/or .alpha.-methylstyrene, p-methylstyrene and acrylonitrile and/or methacrylonitrile, the terpolymer having been produced by mass polymerization.
    Type: Grant
    Filed: November 22, 1985
    Date of Patent: January 27, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Frank Wingler, Otto Koch, Joachim Doering, Karl-Heinz Ott, Lothar Liebig
  • Stabilizer systems for ABS plastics and ABS alloys
    Patent number: 4632956
    Abstract: Thermoplastic moulding compounds containing an ABS plastics and optionally other plastics are stabilized with a benzoin derivative corresponding to the following general formula: ##STR1## wherein R represent, independently of one another, hydrogen, C.sub.1 -C.sub.6 alkyl or halogen; used in quantities of from 0.05 to 2%, by weight, based on the plastics.
    Type: Grant
    Filed: September 11, 1985
    Date of Patent: December 30, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Jurgen Kress, Herbert Eichenauer, Karl-Heinz Ott, Jochen Schoeps, Alfred Pischtschan
  • Thermoplastic moulding compositions with an improved heat distortion point
    Patent number: 4622363
    Abstract: The present invention relates to the use of a copolymer with an Mw of 2.times.10.sup.6 to 1.times.10.sup.7 in amounts of 0.5 to 5 parts by weight for improving the heat distortion point of thermoplastic mixtures containing polycarbonates, graft polymers and copolymers, and the thermoplastic mixtures correspondingly rendered dimensionally stable under the influence of heat.
    Type: Grant
    Filed: September 23, 1985
    Date of Patent: November 11, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Hans-Jurgen Kress, Karl-Heinz Ott, Horst Peters, Josef Buekers
  • Process for the production of high molecular weight thermoplastic resins
    Patent number: 4617358
    Abstract: A process for the production of uncross-linked vinyl polymers in two steps, a mixture of vinyl monomer, aliphatic hydroxyl compound, water and initiator being prepolymerized in step (A) and polymerization being completed in step (B) after the addition of more vinyl monomer and an emulsifier.
    Type: Grant
    Filed: May 30, 1985
    Date of Patent: October 14, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Karl-Heinz Ott
  • Polymer mixtures with a mat surface
    Patent number: 4612347
    Abstract: The invention relates to polymer mixtures with a mat surface, based on graft polymers with acid functions and thermoplastic resins with basic functions.
    Type: Grant
    Filed: February 6, 1985
    Date of Patent: September 16, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Joachim Doring, Karl-Heinz Ott, Ludwig Bottenbruch
  • Polymer alloys having a mat surface
    Patent number: 4560726
    Abstract: Polymer alloys having a mat surface constituting a mixture of grafted rubbers, the graft superstrate containing an acidic monomer in one part of the mixture and a basic monomer in the other part.
    Type: Grant
    Filed: October 9, 1984
    Date of Patent: December 24, 1985
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Joachim Doring, Karl-Heinz Ott, Ludwig Bottenbruch