Patents by Inventor Dominicus van Esbroeck
Dominicus van Esbroeck 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).
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Publication number: 20110194984Abstract: The invention relates to a process for continuously preparing water-absorbing polymer particles by mixing a monomer solution with a redox initiator consisting of at least one oxidizing agent and at least one reducing agent and polymerizing it, wherein the monomer solution is mixed with at least one oxidizing agent upstream of the polymerization reactor and the at least one reducing agent is metered into the polymerization reactor, and also to an apparatus for performing the process.Type: ApplicationFiled: April 14, 2011Publication date: August 11, 2011Applicant: BASF SEInventors: Matthias Weismantel, Michael de Marco, Andreas Daiss, Dominicus van Esbroeck, Karl J. Possemiers, Ronny De Kaey, Ieo Van Miert
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Patent number: 7947794Abstract: The invention relates to a process for continuously preparing water-absorbing polymer particles by mixing a monomer solution with a redox initiator consisting of at least one oxidizing agent and at least one reducing agent and polymerizing it, wherein the monomer solution is mixed with at least one oxidizing agent upstream of the polymerization reactor and the at least one reducing agent is metered into the polymerization reactor, and also to an apparatus for performing the process.Type: GrantFiled: August 31, 2006Date of Patent: May 24, 2011Assignee: BASF SEInventors: Matthias Weismantel, Michael de Marco, Andreas Daiss, Dominicus van Esbroeck, Karl J. Possemiers, Ronny De Kaey, Leo Van Miert
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Patent number: 7915355Abstract: The present invention relates to a process for continuously preparing water-absorbing polymers by mixing a monomer solution with at least one crosslinker and polymerizing the resulting mixture, wherein the residence time of the mixture between the addition of the at least one crosslinker and the entry into the polymerization reactor is less than 180 seconds, and also to an apparatus for performing the process.Type: GrantFiled: August 31, 2006Date of Patent: March 29, 2011Assignee: BASF SEInventors: Matthias Weismantel, Michael de Marco, Andreas Daiss, Dominicus van Esbroeck, Karl J. Possemiers, Ronny De Kaey, Leo Van Miert
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Publication number: 20100324212Abstract: The invention relates to a process for producing a water-absorbing resin by polymerization of a reaction mixture comprising at least one hydrophilic monomer and, if appropriate, at least one crosslinker in a reactor, which comprises admixing the reaction mixture with at least one first portion of a particulate additive before the reaction mixture has reached a residence time of 40% of the overall residence time in the reactor and with at least one second portion of a particulate additive when the reaction mixture has reached a residence time of 45% or more of the overall residence time in the reactor, the additive being selected from water-absorbing resin powders, fillers and mixtures thereof, the total solids content of monomer and additive being in the range from 30% to 60% by weight, the amount of additive being in the range from 5% to 50% by weight, based on the monomers, and the weight ratio of the first portion to the second portion of the additive being in the range from 10:1 to 1:5.Type: ApplicationFiled: August 23, 2010Publication date: December 23, 2010Applicant: BASF SEInventors: Uwe Stueven, Rüdiger Funk, Matthias Weismantel, Thomas Daniel, Annemarie Hillebrecht, Dominicus van Esbroeck, Karl J. Possemiers
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Publication number: 20100273942Abstract: 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: ApplicationFiled: December 8, 2008Publication date: October 28, 2010Applicant: BASF SEInventors: Rüdiger Funk, Matthias Weismantel, Dominicus van Esbroeck, Filip Mees
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Publication number: 20100272998Abstract: A process for producing water-absorbing polymer particles, wherein a product stream comprising water-absorbing polymer particles is tested for nonferritic metallic impurities by means of an eddy current detector.Type: ApplicationFiled: December 9, 2008Publication date: October 28, 2010Applicant: BASF SE a German corporationInventors: Matthias Weismantel, Rüdiger Funk, Dominicus van Esbroeck
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Patent number: 7786211Abstract: The invention relates to a process for producing a water-absorbing resin by polymerization of a reaction mixture comprising at least one hydrophilic monomer and, if appropriate, at least one crosslinker in a reactor, which comprises admixing the reaction mixture with at least one first portion of a particulate additive before the reaction mixture has reached a residence time of 40% of the overall residence time in the reactor and with at least one second portion of a particulate additive when the reaction mixture has reached a residence time of 45% or more of the overall residence time in the reactor, the additive being selected from water-absorbing resin powders, fillers and mixtures thereof, the total solids content of monomer and additive being in the range from 30% to 60% by weight, the amount of additive being in the range from 5% to 50% by weight, based on the monomers, and the weight ratio of the first portion to the second portion of the additive being in the range from 10:1 to 1:5.Type: GrantFiled: December 28, 2006Date of Patent: August 31, 2010Assignee: BASF SEInventors: Uwe Stueven, Rüdiger Funk, Matthias Weismantel, Thomas Daniel, Annemarie Hillebrecht, Dominicus van Esbroeck, Karl J. Possemiers
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Publication number: 20090008220Abstract: The invention relates to the use of an apparatus for adding at least one solid or viscous liquid additive, or an additive dispersed in solvent, to a reactor interior of a reactor for preparing crosslinked, finely divided polymers by copolymerizing (a) water-soluble, monoethylenically unsaturated monomers and (b) from 0.001 to 5 mol %, based on the monomers (a), of monomers comprising at least two polymerizable groups, (c) from 0 to 20 mol %, based on the monomers (a), of water-insoluble monoethylenically unsaturated monomers, where the apparatus comprises at least one screw for conveying the at least one additive and the at least one screw ends in an addition orifice substantially flush with the inner wall of the reactor interior.Type: ApplicationFiled: July 3, 2006Publication date: January 8, 2009Applicant: BASF AKTIENGESSELLSCHAFTInventors: Annemarie Hillebrecht, Uwe Stueven, Leo Van Miert, Dominicus van Esbroeck, Bernd Brian, Siegfried Chszaniecki
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Publication number: 20080306209Abstract: The invention relates to a process for producing a water-absorbing resin by polymerization of a reaction mixture comprising at least one hydrophilic monomer and, if appropriate, at least one crosslinker in a reactor, which comprises admixing the reaction mixture with at least one first portion of a particulate additive before the reaction mixture has reached a residence time of 40% of the overall residence time in the reactor and with at least one second portion of a particulate additive when the reaction mixture has reached a residence time of 45% or more of the overall residence time in the reactor, the additive being selected from water-absorbing resin powders, fillers and mixtures thereof, the total solids content of monomer and additive being in the range from 30% to 60% by weight, the amount of additive being in the range from 5% to 50% by weight, based on the monomers, and the weight ratio of the first portion to the second portion of the additive being in the range from 10:1 to 1:5.Type: ApplicationFiled: December 28, 2006Publication date: December 11, 2008Inventors: Uwe Stueven, Rudiger Funk, Matthias Weismantel, Thomas Daniel, Annemarie Hillebrecht, Dominicus van Esbroeck, Karl J. Possemiers
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Publication number: 20080275195Abstract: The present invention relates to a process for continuously preparing water-absorbing polymers by mixing a monomer solution with at least one crosslinker and polymerizing the resulting mixture, wherein the residence time of the mixture between the addition of the at least one crosslinker and the entry into the polymerization reactor is less than 180 seconds, and also to an apparatus for performing the process.Type: ApplicationFiled: August 31, 2006Publication date: November 6, 2008Applicant: BASF SEInventors: Matthias Weismantel, Michael de Marco, Andreas Daiss, Dominicus van Esbroeck, Karl J. Possemiers, Ronny De Kaey, Leo Van Miert
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Publication number: 20080221282Abstract: The invention relates to a process for continuously preparing water-absorbing polymer particles by mixing a monomer solution with a redox initiator consisting of at least one oxidizing agent and at least one reducing agent and polymerizing it, wherein the monomer solution is mixed with at least one oxidizing agent upstream of the polymerization reactor and the at least one reducing agent is metered into the polymerization reactor, and also to an apparatus for performing the process.Type: ApplicationFiled: August 31, 2006Publication date: September 11, 2008Applicant: BASF SEInventors: Matthias Weismantel, Michael de Marco, Andreas Daiss, Dominicus van Esbroeck, Karl J. Possemiers, Ronny De Kaey, Leo Van Miert
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Publication number: 20080214749Abstract: 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: ApplicationFiled: March 23, 2006Publication date: September 4, 2008Applicant: BASF AktiengesellschaftInventors: Matthias Weismantel, Stefan Bruhns, Dominicus van Esbroeck
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Publication number: 20080200623Abstract: The invention relates to a process for preparing water-absorbing polymer particles, comprising the inertization of monomer solutions, wherein the monomer solution, based on the dissolved monomer, comprises from 0.001 to 0.016% by weight of at least one polymerization inhibitor and at least 50% by volume of the inert gas used to inertize the monomer solution is transferred into the polymerization reactor together with the inertized monomer solution, and also to apparatus for performing the process.Type: ApplicationFiled: August 31, 2006Publication date: August 21, 2008Applicant: BASF SEInventors: Matthias Weismantel, Rudiger Funk, Dominicus van Esbroeck, Karl J. Possemiers, Ronny De Kaey, Leo Van Miert
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Publication number: 20080194863Abstract: 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: ApplicationFiled: August 31, 2006Publication date: August 14, 2008Applicant: BASF SEInventors: Matthias Weismantel, Michael de Marco, Dominicus van Esbroeck, Karl J. Possemiers, Ronny De Kaey
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Publication number: 20080080300Abstract: The invention relates to a mixing kneader comprising at least two shafts (2,3) configured as hollow shafts, on whose surfaces kneading bars (4) are disposed on elements (5). The construction of the shafts is selected in such a way that the resonant frequencies of the shafts have a separation of at least 5% from the excitation frequencies. At least one of the shafts is preferably flowed through by a temperature-control medium, the inlet being disposed on one side and the outlet on the other side of the shaft. The mixing kneader preferably comprises at least one orifice above the shafts which is configured as a dome, the dome being closed by a displacer (22). In addition, at least one orifice for product withdrawal is provided, whose orifice cross section is adjustable during operation.Type: ApplicationFiled: September 28, 2005Publication date: April 3, 2008Applicant: BASF AKTIENGESELLSCHAFTInventors: Uwe Stueven, Leo Van Miert, Dominicus van Esbroeck, Oskar Stephan, Annemarie Hillebrecht, Huanmin Wei