Patents by Inventor Joachim Kunde

Joachim Kunde 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).

  • Hydrolytic polymerization of epsilon-caprolactam
    Patent number: 4204049
    Abstract: An improved process for the continuous polymerization of .epsilon.-caprolactam in the presence of water as initiator in a vertical downward-flow tubular reactor, in which the .epsilon.-caprolactam is partially polymerized at elevated temperature in a first, mechanically agitated reaction zone and is further polymerized in further reaction zones to the desired degree of polymerization. Poly-.epsilon.-caprolactam is discharged in the form of a melt. The polymerization is carried out at a gauge pressure of from 0.2 to 0.9 bar, constant in all reaction zones. The temperature in the first reaction zone is maintained according to the relationship t.ltoreq.265+43 p .degree.C., where p is the numerical value of the gauge pressure in bars which relationship is subject to the condition that the temperature be within the range of 260.degree. to 295.degree. C.
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: May 20, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Paul Matthies, Joachim Kunde, Werner Hoerauf
  • Manufacture of paper-like and textile-like sheets
    Patent number: 4098640
    Abstract: The manufacture of paper-like and textile-like sheet materials by the use of fibrids which have been obtained by dissolving poly(amide-imide) resins in an organic solvent, mixing the resulting solution with a liquid which is a non-solvent for the polymer and introducing the resulting solution into a liquid precipitation medium while exposing it to shearing forces.The present invention relates to the use, for the manufacture of paper-like and textile-like sheet materials, of novel fibrids, which have been obtained by dissolving poly(amide-imide) resins in an organic solvent, mixing the resulting solution with a liquid which is a non-solvent for the polymer and introducing the resulting solution into a liquid precipitation medium while exposing it to shearing forces.
    Type: Grant
    Filed: September 28, 1976
    Date of Patent: July 4, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Bruno Sander, Heinz Berbner, Rolf Steinberger, Eckhard Ropte, Jenoe Kovacs, Joachim Kunde
  • Thermoplastic polybutylene terephthalate molding compositions of improved tracking resistance
    Patent number: 4043971
    Abstract: Thermoplastic polybutylene terephthalate molding compositions containing calcium sulfate and/or barium sulfate to increase the tracking resistance.
    Type: Grant
    Filed: April 21, 1976
    Date of Patent: August 23, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Wurmb, Joachim Kunde, Johannes Schlag, Hans Georg Dorst
  • Reinforced thermoplastics
    Patent number: 3988284
    Abstract: Reinforced plastics containing an addition of from 0.05 to 2% w/w of a styrene oligomer.
    Type: Grant
    Filed: January 3, 1975
    Date of Patent: October 26, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Wurmb, Joachim Kunde, Dieter Stein, Hermann Gausepohl, Rainer Theysohn
  • Glass-fiber-reinforced polyester molding compositions of reduced flammability
    Patent number: 3963669
    Abstract: Glass-fiber-reinforced molding compositions of reduced flammability consisting of (A) a linear saturated polyester resin, (B) from 10 to 60 per cent by weight of glass fibers and (C) from 3 to 30 per cent by weight of a flame retardant. The compositions contain from 2 to 20 per cent by weight, based on the total weight of the molding composition, of a particulate water-insoluble silicate having a bulk density of more than 100 g/l, which prevents dripping of the composition when in contact with an open flame.
    Type: Grant
    Filed: February 13, 1975
    Date of Patent: June 15, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Wurmb, Joachim Kunde, Wolfgang Seydl