Patents by Inventor Fritz Puchner

Fritz Puchner 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).

  • Wet-strength agent with low DCP content
    Patent number: 6576687
    Abstract: The invention relates to a novel process for the preparation of polycondensate solutions based on polyamidoamine/epichlorohydrin resins that gives products having a very low content of organic chlorine compounds, in particular a 1,3-dichlorophenol-2-propanol content of <0.1%, in combination with high activity and good shelf-life.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: June 10, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Rudolf Gassen, Joachim König, Karlheinrich Meisel, Fritz Puchner, Jürgen Reiners, Horst Zwick
  • Optically brightened plastics for optically brightening paper-coating compounds and paper-coating compounds optically brightened in this manner
    Patent number: 6387296
    Abstract: Paper coating slips having high whiteness, high greying limit and high lightfastness can be prepared with the aid of whitened finely divided plastics.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: May 14, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Udo Eckstein, Joachim König, Fritz Puchner, Ulrich Feldhues, Matthias Köcher, Uwe Vogt, Eckhard Wenderoth
  • Pigment preparations useful for ink-jet printing
    Patent number: 6245138
    Abstract: The invention relates to aqueous pigment preparation containing an ionic alkoxylated styrene-phenol condensate or a mixture thereof with a hydroxy-terminated alkoxylated styrene-phenol condensate.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: June 12, 2001
    Assignees: Bayer Aktiengesellschaft, Bayer Corporation
    Inventors: Roger Nyssen, Dirk Pfützenreuter, Rolf Richter, Fritz Puchner, Karin Hassenrück
  • Pigment preparations useful for ink-jet printing
    Patent number: 6077339
    Abstract: The present invention relates to a method for ink-jet printing with a printing ink containing a pigment preparation containing(a) water(b) a dispersing agent, and(c) at least one pigment consisting of a barbituric acid substituted by radicals containing methine or azo groups or a derivative thereof, preferably present as a salt or a complex, a solid solution, an inclusion compound, or an intercalation compound.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: June 20, 2000
    Assignees: Bayer Aktiengesellschaft, Bayer Corporation
    Inventors: Roger Nyssen, Dirk Pfutzenreuter, Rolf Richter, Fritz Puchner, Karin Hassenruck
  • Chlorine-free multifunctional resins for paper finishing
    Patent number: 5739249
    Abstract: The invention relates to a new process for the preparation of cellulose-containing material provided with a dry-strength and wet-strength finish and/or sized, characterised in that the cellulose-containing material is treated with a water-dispersible polyisocyanate mixture (I), which contains tertiary amino and/or ammonium groups, optionally polyether units and optionally hydrophobic groups.
    Type: Grant
    Filed: August 8, 1995
    Date of Patent: April 14, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jurgen Reiners, Hans-Josef Laas, Joachim Konig, Helmut Reiff, Joachim Probst, Bruno Bomer, Reinhard Halpaap, Fritz Puchner, Harro Traubel
  • Chlorine-free multifunctional resins for paper finishing
    Patent number: 5503714
    Abstract: The invention relates to a new process for the preparation of cellulose-containing material provided with a dry-strength and wet-strength finish and/or sized, characterized in that the cellulose-containing material is treated with a water-dispersible polyisocyanate mixture (I), which contains tertiary amino and/or ammonium groups, optionally polyether units and optionally hydrophobic groups.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: April 2, 1996
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jurgen Reiners, Hans-Josef Laas, Joachim Konig, Helmut Reiff, Joachim Probst, Bruno Bomer, Reinhard Halpaap, Fritz Puchner, Harro Traubel
  • Process for the preparation of polycondensates
    Patent number: 5434222
    Abstract: The new process for the preparation of polycondensates from polyamidoamines, epichlorohydrin and if appropriate polyamines, unreacted epichlorohydrin being removed by passing an inert gas through the reaction mixture, produces salt-free reaction products which have very low organic chlorine contents and at the same time very low values for dichloropropanol, chloropropanediol and epichlorohydrin, and are excellently suitable as auxiliaries for paper and textiles.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: July 18, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jurgens Reiners, Karl Leiritz, Fritz Puchner
  • Pigment printing on fibre materials
    Patent number: 5344620
    Abstract: Water-soluble crosslinkable compounds obtainable by reaction of reactive products which contain halogenohydrin groups and have been obtained by reacting polyamines and epihalogenohydrin or 1,3-dihalogeno-2-hydroxy-propane with inorganic bases and subsequently reacting the resulting products with inorganic acids and/or organic acids, can be used as pigment binders and/or crosslinking agents in textile printing pastes.
    Type: Grant
    Filed: January 16, 1992
    Date of Patent: September 6, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jurgen Reiners, Herbert Wigger, Fritz Puchner
  • Process for sizing paper
    Patent number: 5314721
    Abstract: The new vinyl polymer dispersions are obtainable by free radical polymerisation of olefinically unsaturated monomers in the presence of a cationic polyamidoamine which has been rendered hydrophobic, and can be used as sizing agents for paper which are distinguished, in particular, by their shear, electrolyte, heat and storage stability.
    Type: Grant
    Filed: January 5, 1993
    Date of Patent: May 24, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Muller, Joachim Probst, Heinrich Alberts, Joachim Konig, Heinz Baumgen, Fritz Puchner
  • Paper size
    Patent number: 5258466
    Abstract: Emulsion polymers which are prepared by free-radical polymerisation of monomers in the presence ofa) polymers of the formulae ##STR1## wherein the radicals have the meanings given in the description, and b) low-molecular anionic emulsifiers,are outstandingly suitable as surface sizes for paper. They are distinguished by a low tendency to foaming and by a wide application spectrum.
    Type: Grant
    Filed: June 12, 1991
    Date of Patent: November 2, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gunter Sackmann, Joachim Konig, Fritz Puchner, Heinz Baumgen
  • Process for the preparation of concentrated dyestuff solutions
    Patent number: 4163012
    Abstract: The invention relates to the preparation of concentrated solutions of azo dyestuffs containing ionic groups, by precipitating during the diazotization and/or coupling reaction and/or after the coupling reaction the foreign ions which lower the solubility of the dyestuffs and separating off these ions as sparingly soluble salts.In this way dyestuff solutions which are stable to storage at room temperature and have a dyestuff content of 10 to 50 percent by weight are obtained.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: July 31, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Erich Kramer, Horst Nickel, Fritz Puchner