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-Absorbent Polymer Foams
    Publication number: 20120232176
    Abstract: A process for preparing water-absorbing polymeric foams by polymerization of a foamed aqueous monomer solution or suspension, comprising an ethylenically unsaturated monomer which bears acid groups and may be at least partly neutralized, a crosslinker, a photoinitiator and a surfactant.
    Type: Application
    Filed: November 19, 2010
    Publication date: September 13, 2012
    Applicant: BASF SE
    Inventors: Francisco Javier Lopez Villanueva, Markus Linsenbühler, Matthias Weismantel, Bernd Siegel, Timo Baumgaertner, Michael Fastner
  • Postcrosslinking of water-absorbing polymers
    Patent number: 8258223
    Abstract: The invention concerns a process for producing water-absorbing polymer, which comprises a base polymer A being mixed with a first aqueous solution B of at least one surface postcrosslinker and a second aqueous solution C of at least one polyvalent cation and thermally treated, wherein said base polymer A is based on at least 50% neutralized acid-functional monomer and said solutions B and C are metered wholly or partly concurrently through separate nozzles whereby a water-absorbing polymer having a high saline flow conductivity value is obtained.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: September 4, 2012
    Assignee: BASF SE
    Inventors: Ulrich Riegel, Thomas Daniel, Matthias Weismantel, Mark Elliott, Dieter Hermeling
  • METHOD FOR RE-WETTING SURFACE POST-CROSS-LINKED, WATER-ABSORBENT POLYMER PARTICLES
    Publication number: 20120196987
    Abstract: A process for producing water-absorbing polymer particles, wherein surface postcrosslinked water-absorbing polymer particles are remoisturized and classified, and wherein the time between remoisturization and classification is at least 15 minutes.
    Type: Application
    Filed: October 6, 2010
    Publication date: August 2, 2012
    Applicant: BASF SE
    Inventors: Rüdiger Funk, Jürgen Schröder, Thomas Pfeiffer, Matthias Weismantel
  • Process for Remoisturizing Surface-Postcrosslinked Water-Absorbing Polymer Particles
    Publication number: 20120184684
    Abstract: A process for producing water-absorbing polymer particles, wherein surface postcrosslinked water-absorbing polymer particles are remoisturized and delivered pneumatically, and wherein the time between remoisturization and pneumatic delivery is less than one hour.
    Type: Application
    Filed: October 5, 2010
    Publication date: July 19, 2012
    Applicant: BASF SE
    Inventors: Rüdiger Funk, Jürgen Schröder, Thomas Pfeiffer, Matthias Weismantel
  • Method for producing water-absorbing composite materials
    Patent number: 8216967
    Abstract: Water-absorbing composites comprising at least two particulate water-absorbing polymers having different pH values and at least one fibrous material are produced without premixing the water-absorbing polymers and are used in hygiene articles.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: July 10, 2012
    Assignee: BASF SE
    Inventors: Rüdiger Funk, Matthias Weismantel, Sylvia Bertha
  • 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
  • Production of superabsorbent polymers on a continuous belt reactor
    Patent number: 8138280
    Abstract: The invention relates to a process for production of superabsorbent polymers on a continuous belt reactor, wherein a continuous polymerization belt rests at least partly upon the upper surface of at least one continuous support belt and the at least one continuous support belt slides at least partly on a fixed surface.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: March 20, 2012
    Assignee: BASF SE
    Inventors: Matthias Weismantel, Rüdiger Funk, Leigh R. Blair, Kevin D. Heitzhaus, Bruce Storey
  • Production of superabsorbent polymers on a continuous belt reactor
    Patent number: 8138281
    Abstract: The invention relates to the production of superabsorbent polymers on a continuous belt reactor, wherein the continuous belt rests at least partly upon at least one support belt and the at least one continuous support belt is a metallic belt with a basis weight of at least 1 kg/m2.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: March 20, 2012
    Assignee: BASF SE
    Inventors: Matthias Weismantel, Rüdiger Funk, Leigh R. Blair, Kevin D. Heitzhaus, Bruce Storey
  • Neutralization Process
    Publication number: 20120059138
    Abstract: The invention relates to a neutralization process in which at least one ethylenically unsaturated carboxylic acid is preneutralized at least partly with a base, wherein the preneutralized solution is divided into at least two part-solutions and at least one part-solution is aftertreated so as to form part-solutions with different degree of neutralization and/or solids content, and also to an apparatus for carrying out the process.
    Type: Application
    Filed: July 1, 2011
    Publication date: March 8, 2012
    Applicant: BASF SE
    Inventors: Michael de Marco, Matthias Weismantel, Karl J. Possemiers, Filip Mees, Ronny De Kaey
  • Coating Process for Water-Absorbing Polymer Particles
    Publication number: 20120058267
    Abstract: A coating process wherein an aqueous liquid is sprayed onto surface postcrosslinked water-absorbing polymer particles in a horizontal mixer and the inner wall of the horizontal mixer which is in contact with the product is made from a stainless steel.
    Type: Application
    Filed: May 10, 2010
    Publication date: March 8, 2012
    Applicant: BASF SE
    Inventors: Uwe Stueven, Rüdiger Funk, Matthias Weismantel, Holger Barthel, Oskar Stephan
  • Method for Producing Water-Absorbing Polymer Particles
    Publication number: 20120048973
    Abstract: A process for producing water-absorbing polymer particles, wherein an aqueous polymer gel is applied by means of a swivel belt to the conveyor belt of a forced-air belt drier, and the swivel belt, proceeding from one end position, is accelerated through a first pivot angle to an angular speed v1, decelerated through a second pivot angle to an angular speed v2 and decelerated through a third pivot angle to the other end position.
    Type: Application
    Filed: June 1, 2010
    Publication date: March 1, 2012
    Applicant: BASF SE
    Inventors: Uwe Stueven, Rüdiger Funk, Matthias Weismantel, Domien van Esbroeck, Ronny De Kaey
  • 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
  • Process for producing water-absorbing polymer particles
    Patent number: 8119755
    Abstract: A process for producing water-absorbing polymer particles by neutralizing the monomer and cooling it by means of an indirect heat exchanger, wherein the specific cooling performance of the heat exchanger is less than 10 W/m2.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: February 21, 2012
    Assignee: BASF SE
    Inventors: Matthias Weismantel, Rüdiger Funk, Leigh R. Blair, Kevin D. Heitzhaus
  • Method for grading a particulate water-absorbing resin
    Patent number: 8104621
    Abstract: Process for classifying a particulate water-absorbing resin using a sieving apparatus at a reduced pressure compared with the ambient pressure and a sieving apparatus for classifying a particulate water-absorbing resin at a reduced pressure compared with the ambient pressure.
    Type: Grant
    Filed: December 31, 2005
    Date of Patent: January 31, 2012
    Inventors: Matthias Weismantel, Rüdiger Funk, Thomas Daniel, Uwe Stueven
  • Process for continuously producing water-absorbing polymer particles
    Patent number: 8080620
    Abstract: A process for continuously producing water-absorbing polymer particles, comprising polymerization, drying, grinding, classification and at least partial recycling of the undersize obtained in the classification, wherein the polymer gel obtained by the polymerization is withdrawn from the polymerization reactor and mixed with the recycled undersize.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: December 20, 2011
    Assignee: BASF SE
    Inventors: Rüdiger Funk, Matthias Weismantel, Leigh R. Blair, Kevin D. Heitzhaus
  • 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
  • Postcrosslinking of Water-Absorbing Polymers
    Publication number: 20110257341
    Abstract: The invention concerns a process for producing water-absorbing polymer, which comprises a base polymer A being mixed with a first aqueous solution B of at least one surface postcrosslinker and a second aqueous solution C of at least one polyvalent cation and thermally treated, wherein said base polymer A is based on at least 50% neutralized acid-functional monomer and said solutions B and C are metered wholly or partly concurrently through separate nozzles whereby a water-absorbing polymer having a high saline flow conductivity value is obtained.
    Type: Application
    Filed: June 28, 2011
    Publication date: October 20, 2011
    Applicant: BASF SE
    Inventors: Ulrich Riegel, Thomas Daniel, Matthias Weismantel, Mark Elliott, Dieter Hermeling