Patents by Inventor Marco Krüger

Marco Krüger 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).

  • Method for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution
    Patent number: 8546498
    Abstract: A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a surrounding gas phase in a reaction chamber, wherein the monomer solution is metered into the reaction chamber via at least one bore, and the diameter is from 210 to 290 ?m per bore and the metering rate is from 0.9 to 5 kg/h per bore.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: October 1, 2013
    Assignee: BASF SE
    Inventors: Marco Krüger, Stefan Blei, Wilfried Heide, Matthias Weismantel, Uwe Stueven
  • Method for the production of water absorbent polymer particles by polymerizing drops of a monomer solution
    Patent number: 8529805
    Abstract: The invention relates to a method for the production of water absorbent polymer particles by polymerizing drops, comprising at least one monomer in a gas phase surrounding the drops, wherein the drops are produced by surrounding a first monomer solution with a second monomer solution and polymerizing the second monomer solution to a higher cross-linked polymer than the first monomer solution.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: September 10, 2013
    Assignee: BASF SE
    Inventors: Dennis Loesch, Matthias Weismantel, Marco Krüger, Antje Ziemer
  • Water-absorbent porous polymer particles having specific sphericity and high bulk density
    Patent number: 8481159
    Abstract: The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution in a surrounding heated gas phase and flowing the gas cocurrent through the polymerization chamber, wherein the temperature of the gas leaving the polymerization chamber is 130° C. or less, the gas velocity inside the polymerization chamber is at least 0.5 m/s, and the droplets are generated by using a droplet plate having a multitude of bores.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: July 9, 2013
    Assignee: BASF SE
    Inventors: Rainer Dobrawa, Thomas Daniel, Uwe Stueven, Marco Krüger, Francisco Javier Lopez Villanueva, Norbert Herfert, Karin Flore, Stefan Blei, Michael A. Mitchell
  • Process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution
    Patent number: 8450428
    Abstract: The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution in a surrounding heated gas phase and flowing the gas cocurrent through the polymerization chamber, which comprises thermal postcrosslinking in the presence of steam.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: May 28, 2013
    Assignee: BASF SE
    Inventors: Thomas Daniel, Marco Krüger, Karin Flore, Stefan Blei, Uwe Stueven, Norbert Herfert, Michael A. Mitchell
  • Method for producing mechanically stable water-absorbent polymer particles
    Patent number: 8419971
    Abstract: A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets, wherein the particle surface is coated at least partly with at least one polymer and/or wax.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: April 16, 2013
    Assignee: BASF SE
    Inventors: Uwe Stueven, Rüdiger Funk, Matthias Weismantel, Wilfried Heide, Marco Krüger
  • Method for producing post-cured water-absorbent polymer particles with a higher absorption by polymerizing droplets of a monomer solution
    Patent number: 8389658
    Abstract: A process for preparing postcrosslinked water-absorbing polymer beads with high absorption by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets, wherein the solids content of the monomer solution is at least 35% by weight and the polymer beads have a mean diameter of at least 150 ?m.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: March 5, 2013
    Assignee: BASF SE
    Inventors: Uwe Stueven, Matthias Weismantel, Wilfried Heide, Marco Krüger, Volker Seidl, Stefan Blei, Dennis Lösch, Rüdiger Funk, Annemarie Hillebrecht
  • Method for producing post-cured water-absorbent polymer particles with a higher absorption by polymerising droplets of a monomer solution
    Patent number: 8202957
    Abstract: A process for preparing postcrosslinked water-absorbing polymer beads with high absorption by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets, wherein the solids content of the monomer solution is at least 35% by weight and the polymer beads have a mean diameter of at least 150 ?m.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: June 19, 2012
    Assignee: BASF SE
    Inventors: Uwe Stueven, Matthias Weismantel, Wilfried Heide, Marco Krüger, Volker Seidl, Stefan Blei, Dennis Loesch, Rüdiger Funk, Annemarie Hillebrecht
  • Method for Producing Post-Cured Water-Absorbent Polymer Particles with a Higher Absorption by Polymerizing Droplets of a Monomer Solution
    Publication number: 20120141792
    Abstract: A process for preparing postcrosslinked water-absorbing polymer beads with high absorption by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets, wherein the solids content of the monomer solution is at least 35% by weight and the polymer beads have a mean diameter of at least 150 ?m.
    Type: Application
    Filed: February 10, 2012
    Publication date: June 7, 2012
    Applicant: BASF SE
    Inventors: Uwe Stueven, Matthias Weismantel, Wilfried Heide, Marco Krüger, Volker Seidl, Stefan Blei, Dennis Lösch, Rüdiger Funk, Annemarie Hillebrecht
  • Method for post-crosslinking of the surface of water-absorbing polymer particles
    Patent number: 8188193
    Abstract: A process for thermally surface postcrosslinking water-absorbing polymer particles in a fluidized bed generated by means of a carrier gas, wherein the surface postcrosslinker is supplied to the fluidized bed in gaseous form.
    Type: Grant
    Filed: July 3, 2009
    Date of Patent: May 29, 2012
    Assignee: BASF SE
    Inventors: Stefan Blei, Marco Krüger, Wilfried Heide, Matthias Weismantel, Uwe Stueven
  • Regulation of a process for producing water-absorbing polymer particles in a heated gas phase
    Patent number: 8183331
    Abstract: In a process for producing water-absorbing polymeric particles which comprises generating droplets comprising monomers, polymerizing the monomers in a heated gas phase surrounding the droplets and flowing the gas through the polymerization reactor, the temperature of the gas leaving the polymerization reactor is closed-loop controlled.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: May 22, 2012
    Assignee: BASF SE
    Inventors: Dennis Lösch, Marco Krüger, Matthias Weismantel, Wilfried Heide
  • Method for producing water-absorbent polymer particles with a higher permeability by polymerising droplets of a monomer solution
    Patent number: 8124229
    Abstract: A process for preparing water-absorbing polymer beads with high permeability by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets, wherein the monomer solution comprises at least 0.5% by weight of a crosslinker, based on the monomer, the polymerization in the droplet takes place in homogeneous phase, and the polymer beads have a mean diameter of at least 150 ?m.
    Type: Grant
    Filed: July 11, 2007
    Date of Patent: February 28, 2012
    Assignee: BASF SE
    Inventors: Uwe Stueven, Matthias Weismantel, Wilfried Heide, Marco Krüger, Volker Seidl, Stefan Blei, Dennis Loesch, Rüdiger Funk, Annemarie Hillebrecht
  • Method for producing polymer particles by the polymerization of fluid drops in a gas phase
    Patent number: 8114320
    Abstract: A process for producing polymer particles by polymerizing liquid droplets in a gas phase by metering a liquid comprising at least one monomer from at least one feed by means of a multitude of bores into a reaction chamber comprising the gas phase, wherein ratio of length of the feed to greatest diameter of the feed in the region of the multitude of bores is at least 10.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: February 14, 2012
    Assignee: BASF SE
    Inventors: Dennis Lösch, Carolin Nadine Dücker, Asif Karim, Andreas Daiss, Marco Krüger, Volker Spindler, Stefan Blei, Dieter Ehnes, Oliver Gampfer, Dieter Reimer, Michael Heeger
  • Method for the production of water-absorbing polymer articles by polymerizing drops of a monomer solution
    Patent number: 8044158
    Abstract: A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a surrounding gas phase, wherein the monomer solution comprises at least 0.0002% by weight of oxygen and the oxygen content of the gas phase is at least 0.5% by volume.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: October 25, 2011
    Assignee: BASF SE
    Inventors: Dennis Lösch, Marco Krüger, Uwe Stueven, Wilfried Heide, Matthias Weismantel, Stefan Blei
  • Process for Producing Water-Absorbent Polymer Particles by Polymerizing Droplets of a Monomer Solution
    Publication number: 20110237754
    Abstract: The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution in a surrounding heated gas phase and flowing the gas cocurrent through the polymerization chamber, which comprises thermal postcrosslinking in the presence of steam.
    Type: Application
    Filed: March 23, 2011
    Publication date: September 29, 2011
    Applicant: BASF SE
    Inventors: Thomas Daniel, Marco Krüger, Karin Flore, Stefan Blei, Uwe Stueven, Norbert Herfert, Michael A. Mitchell
  • METHOD FOR PRODUCING PERMEABLE WATER-ABSORBING POLYMER PARTICLES THROUGH POLYMERIZATION OF DROPS OF A MONOMER SOLUTION
    Publication number: 20110224361
    Abstract: A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a surrounding gas phase, wherein the polymer particles are coated with a permeability improver.
    Type: Application
    Filed: November 18, 2009
    Publication date: September 15, 2011
    Applicant: Basf SE
    Inventors: Thomas Daniel, Uwe Stueven, Marco Krüger, Stefan Blei, Francisco Javier Lopez Villanueva, Norbert Herfert
  • Method for the production of water absorbent polymer particles by polymerizing drops of a monomer solution
    Patent number: 8013087
    Abstract: A process for preparing water-absorbing polymer beads by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets, the initiator being added to the monomer solution from 0.5 to 60 seconds before the droplets are generated.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: September 6, 2011
    Assignee: BASF SE
    Inventors: Dennis Lösch, Marco Krüger, Achim Stammer
  • Fluid-Absorbent Articles
    Publication number: 20110130275
    Abstract: The present invention relates to a process for producing fluid-absorbent cores, comprising mixing a fibrous material and fluid-absorbent polymer particles having low moisture content and low apparent density and pressing the obtained mixture under specific conditions.
    Type: Application
    Filed: August 3, 2009
    Publication date: June 2, 2011
    Inventors: Matthias Weismantel, Rüdiger Funk, Ulrich Schröder, Marco Krüger, Sylvia Bertha, John Joseph Louden
  • Fluid Absorbent Articles
    Publication number: 20110130735
    Abstract: The present invention relates to fluid-absorbent articles, comprising an upper liquid-pervious layer, a lower liquid-impervious layer and a fluid-absorbent core, wherein the fluid-absorbent core comprises a fibrous material and 10 to 95% by weight of spherical fluid-absorbent polymer particles having a moisture content of at least 8% by weight.
    Type: Application
    Filed: July 30, 2009
    Publication date: June 2, 2011
    Inventors: Matthias Weismantel, Rüdiger Funk, Ulrich Schröder, Marco Krüger, John Joseph
  • Method for producing mechanically stable water-absorbent polymer particles
    Patent number: 7951304
    Abstract: A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets and postcrosslinking the polymer particles, wherein the postcrosslinked polymer particles are at least partly coated.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: May 31, 2011
    Assignee: BASF SE
    Inventors: Uwe Stueven, Rüdiger Funk, Matthias Weismantel, Wilfried Heide, Marco Krüger
  • FLUID-ABSORBENT ARTICLES
    Publication number: 20110125119
    Abstract: The present invention relates to fluid-absorbent articles, comprising an upper liquid-pervious layer, a lower liquid-impervious layer, a fluid-absorbent core, wherein the fluid-absorbent core comprises a fibrous material and 10 to 95% by weight of spherical fluid-absorbent polymer particles, and an acquisition distribution layer, wherein the acquisition distribution layer comprises a fibrous material and 0 to 20% by weight of spherical fluid-absorbent polymer particles.
    Type: Application
    Filed: July 30, 2009
    Publication date: May 26, 2011
    Applicant: BASF SE
    Inventors: Matthias Weismantel, Rüdiger Funk, Ulrich Schröder, Marco Krüger, John Joseph Louden