Patents by Inventor Matthias Weismantel

Matthias Weismantel 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
    Patent number: 8633285
    Abstract: A process for producing water-absorbing polymer particles, comprising the addition of a solid additive to a polymer gel by means of a conveying screw (1), wherein the solid additive and a gas volume flow are fed to the conveying screw (1) by means of an addition channel (2).
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: January 21, 2014
    Assignee: BASF SE
    Inventors: Rüdiger Funk, Matthias Weismantel, Dominicus van Esbroeck, Filip Mees
  • Method for the continuous production of water-absorbent polymer particles
    Patent number: 8610097
    Abstract: A process for continuously preparing water-absorbing polymer beads by determining at least one particulate delivery material mass flow by means of incident electromagnetic waves.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: December 17, 2013
    Assignee: BASF SE
    Inventors: Uwe Stueven, Rüdiger Funk, Matthias Weismantel, Filip Mees, Koen Deboel
  • METHOD FOR THE PRODUCTION OF ABSORBENT POLYMER PARTICLES BY POLYMERIZING DROPS OF A MONOMER SOLUTION
    Publication number: 20130316177
    Abstract: A process for preparing water-absorbing polymer beads by polymerizing droplets comprising at least one monomer in a gas phase surrounding the droplets, the droplets being obtained by enveloping a first monomer solution with a second monomer solution and polymerizing the second monomer solution and polymerizing to give a more highly crosslinked polymer than the first monomer solution.
    Type: Application
    Filed: August 1, 2013
    Publication date: November 28, 2013
    Applicant: BASF SE
    Inventors: Dennis Lösch, Matthias Weismantel, Marco Krüger, Antje Ziemer
  • Method for the production of water absorbing polymers
    Patent number: 8592516
    Abstract: A process for producing a water-absorbing polymer by polymerizing a monomer solution and drying the resulting hydrogel by means of a heated gas stream comprises effecting the drying in two or more temperature zones, and/or the gas stream is flowed against the hydrogel upwardly in the upstream sector of the belt dryer and downwardly in the downstream sector of the belt dryer, the direction of flow being reversed at a water content of 15% to 45% by weight for the hydrogel, and/or the hydrogel layer is flowed against in a belt dryer upwardly to some extent at least, the gas velocity being 5% to 30% of the gas velocity required to lift the hydrogel off the belt, also apparatus for carrying out the process and use of the water-absorbing polymers produced by the process to produce hygiene articles.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: November 26, 2013
    Assignee: BASF Aktiengesellschaft
    Inventors: Matthias Weismantel, Stefan Bruhns, Dominicus van Esbroeck
  • Neutralization process
    Patent number: 8575389
    Abstract: The invention relates to a continuous neutralization process in which at least one ethylenically unsaturated carboxylic acid is neutralized at least partly with a base and the temperature of the neutralized solution is less than 70° C., and also to an apparatus for carrying out the process.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: November 5, 2013
    Assignee: BASF SE
    Inventors: Matthias Weismantel, Michael de Marco, Dominicus van Esbroeck, Karl J. Possemiers, Ronny De Kaey
  • Method for the Continuous Production of Water Absorbent Polymer Particles
    Publication number: 20130276325
    Abstract: A process for continuously preparing water-absorbing polymer beads, comprising the drying of a polymer gel on a forced-air belt dryer, the water content of the polymer gel being used to control the forced-air belt dryer during or after the drying.
    Type: Application
    Filed: June 24, 2013
    Publication date: October 24, 2013
    Inventors: Uwe Stueven, Rüdiger Funk, Matthias Weismantel, Karl J. Possemiers, Koen Deboel
  • Hydrogels absorbing aqueous fluids
    Patent number: 8552071
    Abstract: The invention relates to hydrogels capable of absorbing aqueous fluids, which hydrogels are produced by polymerization of olefinically unsaturated carboxylic acids or their derivatives. The hydrogels are characterized in that before, during or after the polymerization reaction and before drying a silicic acid alkali salt of the general formula (I) M2O×nSiO2 is added to the polymerization reaction mixture. In said formula M is an alkali metal and n is a number between 0.5 and 4. The hydrogel obtained in this way is then dried at an elevated temperature. The invention also relates to a method for producing said hydrogels and to their use for absorbing aqueous fluids.
    Type: Grant
    Filed: November 18, 1999
    Date of Patent: October 8, 2013
    Assignee: BASF SE
    Inventors: Thomas Daniel, Ulrich Riegel, Matthias Weismantel, Norbert Herfert, Friedrich Engelhardt
  • Method for the continuous production of water-absorbent polymer particles
    Patent number: 8546461
    Abstract: The present invention relates to a method for producing water-absorbing polymer particles by radiation-inducing polymerization on a continuously revolving belt, electromagnetic radiation having a wavelength of greater than 400 nm being shielded.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: October 1, 2013
    Assignee: BASF SE
    Inventors: Matthias Weismantel, Rüdiger Funk, Leigh R. Blair, Kevin D. Heitzhaus
  • 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
  • Process for producing water-absorbing particles
    Patent number: 8541528
    Abstract: A process for producing water-absorbing polymer particles, wherein an aqueous polymer gel is dried in a forced-air belt drier on a circulating conveyor belt and the surface of the conveyor belt has a multitude of elevations or depressions which are suitable for restricting the mobility of the aqueous polymer gel in transverse direction.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: September 24, 2013
    Assignee: BASF SE
    Inventors: Rüdiger Funk, Thomas Pfeiffer, Matthias Weismantel, Stefan Blei, Wilfried Heide, Volker Braig, Thomas Gieger, Andreas Brockmeyer
  • Method for removing metallic impurities
    Patent number: 8534465
    Abstract: A process for removing metallic impurities from a product mass flow comprising water-absorbing polymer particles, wherein the product mass flow has a temperature of 35 to 90° C.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: September 17, 2013
    Assignee: BASF SE
    Inventors: Rüdiger Funk, Jürgen Schröder, Matthias Weismantel
  • 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
  • Method for manufacturing water-absorbing polymer particles with a low centrifuge retention capacity
    Patent number: 8497336
    Abstract: A process for producing water-absorbing polymer particles with a low centrifuge retention capacity by polymerizing in a continuous kneading reactor under an inert gas volume flow of at most 10 m3/h per m3 of reactor volume.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: July 30, 2013
    Assignee: BASF SE
    Inventors: Matthias Weismantel, Rüdiger Funk, Ronny De Kaey, Karl J. Possemiers
  • Method for grading water-absorbent polymer particles
    Patent number: 8443982
    Abstract: A process for classifying water-absorbing polymer beads, wherein the polymer beads are separated into n particle size fractions by means of at least n screens and n is an integer greater than 1.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: May 21, 2013
    Assignee: BASF Aktiengesellschaft
    Inventors: Uwe Stueven, Rüdiger Funk, Matthias Weismantel, Jürgen Schröder, Domien van Esbroeck
  • 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 water-absorbing polymer particles
    Patent number: 8410222
    Abstract: A process for producing water-absorbing polymer particles, comprising polymerization, drying, comminution, classification and recycling of the undersize obtained in the classification, wherein the recycled undersize is coated with a reducing agent and/or inorganic particles.
    Type: Grant
    Filed: July 3, 2009
    Date of Patent: April 2, 2013
    Assignee: BASF SE
    Inventors: Rüdiger Funk, Matthias Weismantel, Sylvia Bertha
  • Neutralization process
    Patent number: 8410235
    Abstract: The invention relates to a neutralization process in which at least one ethylenically unsaturated carboxylic acid is neutralized at least partly with a base and at least one stream of the neutralization is determined continuously, and also to an apparatus for carrying out the process.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: April 2, 2013
    Assignee: BASF SE
    Inventors: Matthias Weismantel, Louis Claessens, Karl J. Possemiers, Ronny De Kaey, Rüdiger Funk
  • Process for producing water-absorbing polymer particles with improved blood absorbance by polymerizing droplets of a monomer solution
    Patent number: 8399585
    Abstract: A process for producing water-absorbing polymer particles with improved blood absorbence by polymerizing droplets of a monomer solution in a surrounding gas phase, wherein the monomer solution comprises a surfactant.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: March 19, 2013
    Assignee: BASF SE
    Inventors: Francisco Javier Lopez Villanueva, Markus Linsenbühler, Rainer Dobrawa, Bernd Siegel, Matthias Weismantel
  • 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
  • Production of superabsorbent polymers on a continuous belt reactor
    Patent number: 8389595
    Abstract: The invention relates to the production of superabsorbent polymers comprising polymerizing a monomer solution on a continuous belt reactor, wherein the consistency of the formed polymer gel at the end of the continuous belt reactor is controlled by adjusting the intensity of energy-rich radiation.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: March 5, 2013
    Assignee: BASF SE
    Inventors: Matthias Weismantel, Rüdiger Funk, Sylvia Bertha, Leigh R. Blair, Kevin D. Heitzhaus, Bruce Storey