Patents by Inventor Hanshelmut Kaeppel

Hanshelmut Kaeppel 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).

  • Preparation of resilient melamine foams
    Patent number: 4666948
    Abstract: Resilient foams based on melamine resins are prepared by foaming an aqueous solution which contains a melamine/formaldehyde precondensate, an emulsifier, a volatile blowing agent and a curing agent and then curing the foam. In this process, from 0.2 to 4% by weight of an alkali metal, alkaline earth metal or aluminum salt of an organic, preferably polybasic acid, of a polyphosphoric acid or of a boron acid are added to the aqueous solution.
    Type: Grant
    Filed: September 24, 1986
    Date of Patent: May 19, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Frank P. Woerner, Peter Neumann, Harald Mahnke, Josef Lamprecht, Dieter Horn, Gerhard Turznik, Friedrich Kraus, Hanshelmut Kaeppel, Eduard Heim
  • Stabilized melamine resin foams
    Patent number: 4530940
    Abstract: Stabilized melamine resin foams contain, as a stabilizer, a copper or iron compound in an amount corresponding to from 10 ppm to 3%, based on the weight of the melamine resin, of Cu or Fe, preferably an oxide, hydroxide or carbonate of copper.
    Type: Grant
    Filed: June 28, 1984
    Date of Patent: July 23, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Frank P. Woerner, Horst Reimann, Harald Mahnke, Peter Neumann, Gerhard Turznik, Hanshelmut Kaeppel
  • Process for the manufacture of organic polymer polyol
    Patent number: 4251411
    Abstract: A process for the manufacture of partially dehydrated organic polymer polyol dispersions from the reaction of polyhydroxyl compounds and aqueous polymer dispersions wherein the problem of excessive viscosity is overcome by mixing the reactants with a recycled partially dehydrated polyol polymer dispersion, removing water from the reaction mixture, removing a portion of the partially dehydrated polyol polymer dispersion, and recycling the remainder.
    Type: Grant
    Filed: September 11, 1978
    Date of Patent: February 17, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerhard Heinz, Hermann Dikow, Wolfgang Jarre, Dietmar Nissen, Klaus Matthias, Hanshelmut Kaeppel
  • Continuous manufacture of unsaturated polyesters
    Patent number: 4180635
    Abstract: An economical and environmentally advantageous process for the continuous manufacture of unsaturated polyesters, wherein the vapors formed during the polycondensation are purified, in a two-part distillation column, to a degree where the residual content of organic starting materials is less than 1.5 percent by weight, based on the total weight of the effluent, and the unconverted starting materials are recycled to the process.
    Type: Grant
    Filed: March 29, 1978
    Date of Patent: December 25, 1979
    Assignee: BASF Aktiengesellschaft
    Inventors: Hermann Fischer, Richard Thoma, Hanshelmut Kaeppel, Ernst Kochendoerfer, Werner Lagaly