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).

  • Patent number: 10450395
    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: Grant
    Filed: August 1, 2013
    Date of Patent: October 22, 2019
    Assignee: BASF SE
    Inventors: Dennis Lösch, Matthias Weismantel, Marco Krüger, Antje Ziemer
  • Publication number: 20190276608
    Abstract: A process for producing superabsorbents, comprising polymerization, drying, crushing, pneumatic conveying, comminuting and classifying, wherein the gas temperature at the end of the pneumatic conveying is from 50 to 95° C.
    Type: Application
    Filed: May 23, 2017
    Publication date: September 12, 2019
    Inventors: Gerald Grünewald, Ruediger Funk, Matthias Weismantel
  • Publication number: 20190255514
    Abstract: Filling process for superabsorbent polymer particles The invention relates to a filling process for superabsorbent polymer particles, comprising discharging the superabsorbent polymer particles out of a silo into bulk container for shipping, wherein the filling level of the silo during filling of the bulk container is never less than 20%, in order to avoid particle segregation.
    Type: Application
    Filed: October 16, 2017
    Publication date: August 22, 2019
    Inventors: Dieter Hermeling, Rüdiger Funk, Matthias Weismantel, Monte Alan Peterson, Peter Leunis, Karl Possemiers
  • Patent number: 10208149
    Abstract: A process for preparing water-absorbing polymer beads with high permeability by polymerizing droplets of a monomer solution, comprising monomers bearing acid groups, in a gas phase surrounding the droplets, wherein the monomer solution comprises polyvalent cations and the polymer beads have a mean diameter of at least 150 ?m.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: February 19, 2019
    Assignee: BASF SE
    Inventors: Uwe Stueven, Matthias Weismantel, Wilfried Heide, Marco Krüger, Volker Seidl, Stefan Blei, Dennis Loesch, Rüdiger Funk, Annemarie Hillebrecht
  • Publication number: 20190003789
    Abstract: The invention relates to a heat exchanger for heating gas to a temperature in the range from 150 to 400° C., wherein the gas is heated by indirect heat transfer and all the surfaces of the walls of the heat exchanger which come into contact with the gas have been hot dip galvanized and the surfaces which come into contact with the gas, after the hot dip galvanization, have been heat treated at a temperature in the range from 400 to 750° C. The invention further relates to the use of the heat exchanger.
    Type: Application
    Filed: December 21, 2016
    Publication date: January 3, 2019
    Inventors: Oskar Stephan, Karl-Friedrich Schneider, Matthias Weismantel
  • Patent number: 10137432
    Abstract: The invention relates to a process for producing water-absorbing polymer particles, comprising the steps of: •—processing an aqueous polymer gel from polymerization of a monomer solution or suspension, •—drying the aqueous polymer gel in a conveyer dryer, in particular in a forced air conveyer dryer, wherein •—the conveyer dryer has a circulating conveyer belt and the aqueous polymer gel is conveyed on the circulating conveyer belt, and wherein •—the circulating conveyer belt is formed as a circulating plate conveyer belt, comprising a number of belt plates separated by a hinge line of a hinge assembly and each belt plate having a surface for receiving the aqueous polymer gel, wherein said hinge assembly comprises a knuckle joint (301) with the hinge line in form of a straight hinge line.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: November 27, 2018
    Assignee: BASF SE
    Inventors: Gerald Grünewald, Rüdiger Funk, Matthias Weismantel, Monte Peterson
  • Patent number: 10066064
    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: Grant
    Filed: October 5, 2010
    Date of Patent: September 4, 2018
    Assignee: BASF SE
    Inventors: Rüdiger Funk, Jürgen Schröder, Thomas Pfeiffer, Matthias Weismantel
  • Patent number: 10005064
    Abstract: The invention relates to a process for producing water-absorbing polymer particles, comprising the steps of: •—processing an aqueous polymer gel from polymerization of a monomer solution or suspension, •—drying the aqueous polymer gel in a conveyer dryer, in particular in a forced air conveyer dryer, wherein •—the conveyer dryer has a circulating conveyer belt and the aqueous polymer gel is conveyed on the circulating conveyer belt, and wherein •—the circulating conveyer belt is formed as a circulating plate conveyer belt, comprising a number of belt plates separated by a hinge line of a hinge assembly and each belt plate having a surface for receiving the aqueous polymer gel, wherein said hinge assembly comprises a knuckle joint (301) with the hinge line in form of a straight hinge line.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: June 26, 2018
    Assignee: BASF SE
    Inventors: Gerald Grünewald, Rüdiger Funk, Matthias Weismantel, Monte Peterson
  • Publication number: 20180154335
    Abstract: The invention relates to a process for producing water-absorbing polymer particles, comprising the steps of: •—processing an aqueous polymer gel from polymerization of a monomer solution or suspension, •—drying the aqueous polymer gel in a conveyer dryer, in particular in a forced air conveyer dryer, wherein •—the conveyer dryer has a circulating conveyer belt and the aqueous polymer gel is conveyed on the circulating conveyer belt, and wherein •—the circulating conveyer belt is formed as a circulating plate conveyer belt, comprising a number of belt plates separated by a hinge line of a hinge assembly and each belt plate having a surface for receiving the aqueous polymer gel, wherein said hinge assembly comprises a knuckle joint (301) with the hinge line in form of a straight hinge line.
    Type: Application
    Filed: January 5, 2018
    Publication date: June 7, 2018
    Applicant: BASF SE
    Inventors: Gerald Grünewald, Rüdiger Funk, Matthias Weismantel, Monte Peterson
  • Publication number: 20180135912
    Abstract: A production process for production of water-absorbing polymer particles including drying an aqueous polymer gel in a belt drier with a conveyor belt. The belt drier is formed with a drier setup substantially comprising the conveyor belt and an air recycling conduit downstream of the drier setup for air recycling, where recycled air is withdrawn from the drier setup and fed back to the drier setup via the air recycling conduit.
    Type: Application
    Filed: April 15, 2016
    Publication date: May 17, 2018
    Applicant: BASF SE
    Inventors: Gerald Grünewald, Rüdiger Funk, Matthias Weismantel, Karl Possemiers
  • Patent number: 9950306
    Abstract: A process for producing water-absorbing polymer particles with high free swell rate by polymerizing a monomer solution or suspension comprising an ethylenically unsaturated monomer bearing acid groups, a crosslinker, an initiator and an ethylenically unsaturated ionic surfactant.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: April 24, 2018
    Assignee: BASF SE
    Inventors: Markus Braun, Matthias Weismantel
  • Patent number: 9919284
    Abstract: The present invention relates to an apparatus for producing water-absorbing polymer particles by polymerizing monomers on a continuous conveyor belt, wherein joins of the conveyor belt and/or damage on the conveyor belt surface have been sealed with a sealing composition.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: March 20, 2018
    Assignee: BASF SE
    Inventors: Matthias Weismantel, Rüdiger Funk, Leigh R. Blair, Kevin D. Heitzhaus
  • Patent number: 9914230
    Abstract: The invention relates to the production of superabsorbent polymers on a continuous belt reactor, comprising at least one rotating knife that cuts the formed polymer gel at the end of the continuous belt reactor, wherein the length of the cutting edge is at least 1 cm and the cutting edge is non-parallel to the rotation axis.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: March 13, 2018
    Assignee: BASF SE
    Inventors: Matthias Weismantel, Rüdiger Funk, Leigh R. Blair, Kevin D. Heitzhaus, Bruce Storey
  • Patent number: 9822203
    Abstract: A process for producing water-absorbing polymer particles having high free swell rate and high centrifuge retention capacity with simultaneously high permeability of the swollen gel bed by polymerization of an aqueous monomer solution in a polymerization reactor having at least two shafts (kneaders) which rotate in an axially parallel manner, subsequent extrusion at high temperatures and thermal surface postcrosslinking.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: November 21, 2017
    Assignee: BASF SE
    Inventors: Monica Haag, Roland Krauss, Thomas Gieger, Volker Klock, Matthias Weismantel
  • Patent number: 9777078
    Abstract: A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution, where the monomer solution comprises at least two initiators, one of the initiators is a peroxide with the exception of persulfate, and the molar ratio of peroxide to further initiator is at least 1:8, the water-absorbing polymer particles themselves, and hygiene articles comprising these water-absorbing polymer particles.
    Type: Grant
    Filed: July 12, 2007
    Date of Patent: October 3, 2017
    Assignee: BASF SE
    Inventors: Dennis Loesch, Volker Seidl, Matthias Weismantel
  • Patent number: 9751110
    Abstract: A process for continuously classifying water-absorbing polymer beads by means of at least one screen, at least one screen having at least one guide device on the screen surface.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: September 5, 2017
    Assignee: BASF AKTIENGESELLSCHAFT
    Inventors: Uwe Stueven, Rüdiger Funk, Matthias Weismantel, Meinhard Nitschke, Filip Mees, Leo Van Miert
  • Patent number: 9738769
    Abstract: A process for producing water-absorbing polymer particles with high free swell rate and high permeability by polymerization of an aqueous monomer solution or suspension to give an aqueous polymer gel, wherein a thermal blowing agent essentially free of inorganic acid anions is mixed into the polymer gel, and subsequent thermal drying of the polymer gel.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: August 22, 2017
    Assignee: BASF SE
    Inventors: Matthias Weismantel, Ulrich Riegel, Thomas Gieger, Markus Braun, Michael A. Mitchell
  • Patent number: 9587081
    Abstract: A process for producing water-absorbing polymer particles with high free swell rate and high permeability by polymerization of an aqueous monomer solution or suspension to give an aqueous polymer gel, wherein a thermal blowing agent essentially free of inorganic acid anions is mixed into the polymer gel, and subsequent thermal drying of the polymer gel.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: March 7, 2017
    Assignee: BASF SE
    Inventors: Matthias Weismantel, Ulrich Riegel, Thomas Gieger, Markus Braun, Michael A. Mitchell
  • Patent number: 9574019
    Abstract: A process for preparing water-absorbing polymer particles, comprising polymerization of a foamed monomer solution or suspension, drying, grinding and classification.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: February 21, 2017
    Assignee: BASF SE
    Inventors: Francisco Javier Lopez Villanueva, Markus Linsenbühler, Matthias Weismantel, Bernd Siegel
  • Publication number: 20170037172
    Abstract: A process for preparing water-absorbing polymer beads with high permeability by polymerizing droplets of a monomer solution, comprising monomers bearing acid groups, in a gas phase surrounding the droplets, wherein the monomer solution comprises polyvalent cations and the polymer beads have a mean diameter of at least 150 ?m.
    Type: Application
    Filed: October 21, 2016
    Publication date: February 9, 2017
    Inventors: Uwe Stueven, Matthias Weismantel, Wilfried Heide, Marco Krüger, Volker Seidl, Stefan Blei, Dennis Loesch, Rüdiger Funk, Annemarie Hillebrecht