Patents by Inventor Hans-Jurgen Kress

Hans-Jurgen Kress 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).

  • Flameproofing agents, their preparation and their use for providing polycarbonates with a flame-resistant finish
    Patent number: 4713462
    Abstract: The present invention relates to phthalimide compounds of the formula (I) ##STR1## wherein X denotes H or halogen, for example chlorine or bromine,a and b independently of one another denote 0 or 1 andR denotes a C.sub.1 -C.sub.4 -alkyl radical,which, in combination with alkali metal salts, are suitable as flameproofing agent combinations for thermoplastic, branched, aromatic polycarbonates, and the preparation of these compounds.
    Type: Grant
    Filed: November 26, 1986
    Date of Patent: December 15, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Jurgen Kress, Klaus Kircher
  • Thermoplastic polycarbonate moulding compositions
    Patent number: 4692488
    Abstract: The present invention relates to high-impact, flame-repellant thermoplastic polycarbonate moulding compositions consisting of halogen-free polycarbonates, halogen-free copolymers of styrenes and (meth)acrylonitrile, halogen-free phosphorus compounds of the formula (I) ##STR1## tetrafluoroethylene polymers and small amounts of graft polymers and, if appropriate, effective amounts of stabilizers, pigments, flow control agents, mould release agents and/or antistatics, and a process for their preparation.
    Type: Grant
    Filed: June 18, 1986
    Date of Patent: September 8, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Jurgen Kress, Friedemann Muller, Christian Lindner, Horst Peters, Josef Buekers
  • 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
  • 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
  • Flameproofing agents, their preparation and their use for providing polycarbonates with a flame-resistant finish
    Patent number: 4661543
    Abstract: The present invention relates to phthalimide compounds of the formula (I) ##STR1## wherein X denotes H or halogen, for example chlorine or bromine,a and b independently of one another denote 0 or 1 andR denotes a C.sub.1 -C.sub.4 -alkyl radical,which, in combination with alkali metal salts, are suitable as flameproofing agent combinations for thermoplastic, branched, aromatic polycarbonates, and the preparation of these compounds.
    Type: Grant
    Filed: October 17, 1984
    Date of Patent: April 28, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Jurgen Kress, Klaus Kircher
  • Flameproofing agents, their preparation and their use for flameproofing polycarbonates
    Patent number: 4657955
    Abstract: The present invention relates to new phthalimides of the formula (I) ##STR1## wherein n is an integer of from 1 to 12, preferably 1 to 4 and especially 1 to 2 andR is H or F,and their preparation, these phthalimides being suitable, in combination with alkali metal salts, as flameproofing agent combinations for thermoplastic, branched, aromatic polycarbonates.
    Type: Grant
    Filed: June 11, 1986
    Date of Patent: April 14, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Jurgen Kress, Klaus Kircher
  • 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
  • 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
  • Flameproofing agents, their preparation and their use for flameproofing polycarbonates
    Patent number: 4615832
    Abstract: The present invention relates to new phthalimides of the formula (I) ##STR1## wherein n is an integer of from 1 to 12, preferably 1 to 4 and especially 1 to 2 andR is H or F,and their preparation, these phthalimides being suitable, in combination with alkali metal salts, as flameproofing agent combinations for thermoplastic, branched, aromatic polycarbonates.
    Type: Grant
    Filed: September 26, 1984
    Date of Patent: October 7, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Jurgen Kress, Klaus Kircher
  • Thermoplastic moulding compositions based on polycarbonate/graft polymer mixtures
    Patent number: 4596851
    Abstract: The present invention relates to thermoplastic moulding compositions containing thermoplastic polycarbonates, graft polymers, rubber-free copolymers and, if appropriate, copolymeric rubbers, and also, if appropriate, conventional additives, which are characterized in that the rubber-free copolymers contain internal epoxide compounds.
    Type: Grant
    Filed: April 8, 1985
    Date of Patent: June 24, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christian Lindner, Otto Koch, Hans-Jurgen Kress, Horst Peters
  • Bis-(imide-sulfonate) flameproofing agents, their preparation and their use for flameproofing in polycarbonate
    Patent number: 4594375
    Abstract: The present invention relates to novel bis-(imide-sulphonates) of the formula (I), a process for their preparation, their use for flameproofing aromatic, thermoplastic polycarbonates obtained from halogen-free diphenols, and thermoplastic aromatic polycarbonates obtained from halogen-free diphenols and containing 0.01 to 1% by weight, of bis-(imide-sulphonate) of the formula (I), based on an aromatic, thermoplastic polycarbonate.
    Type: Grant
    Filed: June 4, 1984
    Date of Patent: June 10, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Sivaram Krishnan, Klaus Kircher, Hans-Jurgen Kress
  • Thermoplastic moulding compositions based on polysiloxane/polycarbonate block copolymers
    Patent number: 4569970
    Abstract: The present invention relates toA. Thermoplastic moulding materials based on polydiorganosiloxane/polycarbonate block copolymers and ABS polymers andB. Thermoplastic moulding compositions based on polysiloxane/polycarbonate block copolymers, elastomeric polymers and, if appropriate, polyalkylene terephthalate.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: February 11, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Winfried Paul, Hans-Jurgen Kress, Wolfgang Stix, Christian Lindner, Dieter Neuray, Werner Nouvertne
  • Self-extinguishing thermoplastic moulding compositions of polycarbonate and ABS-polymers
    Patent number: 4563496
    Abstract: This invention relates to self-extinguishing thermoplastic moulding compositions of an aromatic polycarbonate containing a co-condensed halogen, a thermoplastic copolymer containing nucleus-alkylated styrene and an ABS as graft copolymer.
    Type: Grant
    Filed: October 15, 1984
    Date of Patent: January 7, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christian Lindner, Friedemann Muller, Horst Peters, Hans-Jurgen Kress, Josef Buekers
  • ABS-Polycarbonate mixtures which have improved flame resistance
    Patent number: 4548987
    Abstract: ABS-polycarbonate mixtures consisting of an aromatic polycarbonate A, a graft polymer B having a rubber-like graft base and optionally a thermoplastic copolymer C have improved flame resistance if the total mixture contains a compound corresponding to the formulae ##STR1## wherein R.sub.1 represents C.sub.2 -C.sub.6 alkylene,R.sub.2 represents hydrogen or methyl,R.sub.3 represents a direct bond or C.sub.1 -C.sub.4 alkylene, andR.sub.4 represents hydrogen, methyl orCH.sub.2 --OOC--CH.sub.2 --CO--CH.sub.3Polymerized in B or C or in B and C.
    Type: Grant
    Filed: September 5, 1984
    Date of Patent: October 22, 1985
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Bauer, Christian Lindner, Friedemann Muller, Hans-Jurgen Kress, Karl Zabrocki, Josef Buekers
  • Polytetrahydrofurans containing terminal acrylate or methacrylate groups
    Patent number: 4412063
    Abstract: Polytetrahydrofurans containing terminal acrylate or methacrylate groups and having a molecular weight of from 200 to 10,000 and a process for producing such polytetrahydrofurans by homopolymerizing tetrahydrofuran, optionally in an organic solvent, together with acrylic acid anhydride and/or methacrylic acid anhydride and with the aid of a catalyst. The polytetrahydrofuran can be used as rubbers.
    Type: Grant
    Filed: April 2, 1982
    Date of Patent: October 25, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Walter Heitz, Hans-Jurgen Kress, Wolfgang Stix