Patents by Inventor Hans Joachim Leugering

Hans Joachim Leugering 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: 4356283
    Abstract: A process is described for the preparation of mixtures for processing as plastisols or organosols, wherein at least one known plasticizer, at least one first vinyl chloride copolymer and at least one vinyl chloride homopolymer or a second vinyl chloride copolymer are mixed together, if appropriate with the addition of further known substances. The first copolymer is a specific vinyl chloride graft copolymer, of which 5 to 70% by weight are employed, relative to the total quantity of polymers present in the mixture. It contains 99.5 to 88% by weight of polymerized units of vinyl chloride, 0.1 to 11.9% by weight of polymerized units of vinyl acetate and 0.1 to 2.2% by weight of polymerized units of ethylene. The remaining polymer(s) employed is/are prepared in accordance with customary processes.Mixtures prepared in this manner produce plastisols or organosols which have a low viscosity and good stability on storage and which also enable uniform coatings to be obtained by applying a thin layer.
    Type: Grant
    Filed: May 11, 1981
    Date of Patent: October 26, 1982
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jurgen Weinlich, Otto Plewan, Hans-Joachim Leugering, deceased, by Ursula M. Leugering nee Wegener, heiress, by Lothar Leugering, heir, by Manfred Leugering, heir, by Rita Bahn nee Leugering, heiress, by Gunter Leugering, heir
  • Patent number: 4046738
    Abstract: Oxymethylene polymers (POM) are obtained in granular form by cooling a POM solution or dispersion having a temperature above the sintering temperature of the POM in two stages to a temperature just below the said sintering temperature. The solvent or dispersion agent used is a mixture of methanol and water and the cooling agent is a methanol/water mixture which may contain POM suspended therein. The granular POM obtained is suitable as technical material for making shaped articles.
    Type: Grant
    Filed: November 5, 1975
    Date of Patent: September 6, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gunter Sextro, Karlheinz Burg, Hans Joachim Leugering, Helmut Schlaf, Alwin Heller
  • Patent number: 4013617
    Abstract: Hydrophilic polyolefin fibers containing inorganic pigments are obtained by means of flash evaporation of a superheated suspension, which is under at least autogenous pressure. The suspension comprises a dispersion of a hydrophobized inorganic pigment in an emulsion prepared from a solution of a polyolefin in an easily boiling solvent and an aqueous solution of a hydrophilizing agent. The suspension is passed through a nozzle into a low pressure zone to form pigmented fibers.
    Type: Grant
    Filed: May 16, 1975
    Date of Patent: March 22, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wolfgang Gordon, Hans Joachim Leugering, Horst Schaefer
  • Patent number: 3998911
    Abstract: A polypropylene molding composition having an excellent impact strength at a temperature down to -60.degree. C and simultaneously a good hardness contains from 70 to 90% by weight of a polypropylene, 2 to 10% by weight of an ethylene propylene copolymer and 8 to 25% by weight of a polyethylene and is distinguished by a melt index MFI 230/5 lower than that of the polypropylene contained therein and simultaneously higher by the coefficient 1.3 to 7.0 than that of a polypropylene prepared in the presence of the same catalyst as the molding composition and having the same RSV.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: December 21, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Helmut Strametz, Hans Joachim Leugering, Kurt Rust, Manfred Engelmann