Patents by Inventor Rolf-Walter Terwonne
Rolf-Walter Terwonne 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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Patent number: 11596904Abstract: The present invention provides a composite body having, on a porous substrate and in the interstices of the substrate that includes fibers, preferably of an electrically nonconductive material, a porous layer (1) composed of oxide particles bonded to one another and partly to the substrate that include at least one oxide selected from oxides of the elements Al, Zr, Ti and Si, preferably selected from Al2O3, ZrO2, TiO2 and SiO2, and having, at least on one side, a further porous layer (2) including oxide particles bonded to one another and partly to layer (1) that include at least one oxide selected from oxides of the elements Al, Zr, Ti and Si, preferably selected from Al2O3, ZrO2, TiO2 and SiO2, where the oxide particles present in layer (1) have a greater median particle size than the oxide particles present in layer (2), which is characterized in that the median particle size (d50) of the oxide particles in layer (1) is from 0.Type: GrantFiled: December 4, 2019Date of Patent: March 7, 2023Assignee: Evonik Operations GmbHInventors: Christian Hying, David Grzenia, Rolf-Walter Terwonne, Bastian Matthias Brugger, Kira Khaletskaya, Oliver Conradi, Hans-Jürgen Nettelnbreker, Alexander Paasche
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Publication number: 20200197877Abstract: The present invention provides a composite body having, on a porous substrate and in the interstices of the substrate that includes fibers, preferably of an electrically nonconductive material, a porous layer (1) composed of oxide particles bonded to one another and partly to the substrate that include at least one oxide selected from oxides of the elements Al, Zr, Ti and Si, preferably selected from Al2O3, ZrO2, TiO2 and SiO2, and having, at least on one side, a further porous layer (2) including oxide particles bonded to one another and partly to layer (1) that include at least one oxide selected from oxides of the elements Al, Zr, Ti and Si, preferably selected from Al2O3, ZrO2, TiO2 and SiO2, where the oxide particles present in layer (1) have a greater median particle size than the oxide particles present in layer (2), which is characterized in that the median particle size (d50) of the oxide particles in layer (1) is from 0.Type: ApplicationFiled: December 4, 2019Publication date: June 25, 2020Applicant: Evonik Operations GmbHInventors: Christian Hying, David Grzenia, Rolf-Walter Terwonne, Bastian Matthias Brugger, Kira Khaletskaya, Oliver Conradi, Hans-Jürgen Nettelnbreker, Alexander Paasche
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Patent number: 9782728Abstract: The present invention relates to a membrane comprising a flat, flexible substrate having a plurality of openings and having a porous inorganic coating situated on and in said substrate, the material of the substrate being selected from woven or non-woven, electrically non-conductive fibers, characterized in that the substrate comprises polyaramide fibers that are pure or connected to fibers of the further polymer or at least of one of these further polymers, wherein the fibers of at least one of said further polymers comprise a melting point that is lower than the decomposition point of the polyaramide fibers.Type: GrantFiled: June 30, 2010Date of Patent: October 10, 2017Assignee: Evonik Degussa GmbHInventors: Matthias Pascaly, Rolf-Walter Terwonne, Christian Hying
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Patent number: 9680141Abstract: The invention relates to a process for producing a separator comprising the steps of: providing a sheetlike porous substrate, a solvent, ceramic particles and an adhesion promoter; preparing a slip by mixing the solvent, the adhesion promoter and the ceramic particles; coating the substrate with the slip and thermally drying the coated substrate to obtain the separator. The problem addressed is that of specifying a process useful for producing separators having a higher ceramic content. The problem is solved when the solvent used is a mixture of water and at least one organic component; the adhesion promoter used is a mixture of silanes and at least one thermally crosslinkable acrylic polymer; the slip is admixed with a carboxylic acid preparation and also with a defoamer component free from silicone oil.Type: GrantFiled: January 29, 2013Date of Patent: June 13, 2017Assignee: Litarion GmbHInventors: Rolf-Walter Terwonne, Witold Friedemann Rex, Matthias Pascaly, Michael Kube, Christian Hying
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Publication number: 20150017512Abstract: The invention relates to a process for producing a separator comprising the steps of: providing a sheetlike porous substrate, a solvent, ceramic particles and an adhesion promoter; preparing a slip by mixing the solvent, the adhesion promoter and the ceramic particles; coating the substrate with the slip and thermally drying the coated substrate to obtain the separator. The problem addressed is that of specifying a process useful for producing separators having a higher ceramic content. The problem is solved when the solvent used is a mixture of water and at least one organic component; the adhesion promoter used is a mixture of silanes and at least one thermally crosslinkable acrylic polymer; the slip is admixed with a carboxylic acid preparation and also with a defoamer component free from silicone oil.Type: ApplicationFiled: January 29, 2013Publication date: January 15, 2015Applicant: Evonik Litarion GmbHInventors: Rolf-Walter Terwonne, Witold Rex, Matthias Pascaly, Michael Kube, Christian Hying
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Publication number: 20140127546Abstract: The invention relates to a separator which has a porous coating which is not electrically conductive and is composed of oxide particles which are adhesively bonded to one another and to the substrate by means of an inorganic adhesive and comprise at least one oxide selected from among Al2O3 and SiO2 on a substrate and in the interstices of the substrate which has fibres composed of a material which is not electrically conductive, characterized in that at least one sugar is present in the ceramic coating.Type: ApplicationFiled: February 27, 2012Publication date: May 8, 2014Applicant: EVONIK LITARION GmbHInventors: Matthias Pascaly, Rolf-Walter Terwonne, Christian Hying, Henrik Hahn
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Publication number: 20120276456Abstract: Electrolyte, comprising an aprotic solvent, a lithium salt as conducting salt, and an additive, characterized in that the additive is a compound which contains a protonable nitrogen atom and is hydrolysable by water.Type: ApplicationFiled: August 27, 2010Publication date: November 1, 2012Applicant: LI-TEC BATTERY GMBHInventors: Peter Pilgram, Rolf-Walter Terwonne, Denny Thiemig, Joerg Kaiser, Andreas Gutsch
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Publication number: 20120251890Abstract: The present invention relates to a membrane comprising a flat, flexible substrate having a plurality of openings and having a porous inorganic coating situated on and in said substrate, the material of the substrate being selected from woven or non-woven, electrically non-conductive fibers, characterized in that the substrate comprises polyaramide fibers that are pure or connected to fibers of the further polymer or at least of one of these further polymers, wherein the fibers of at least one of said further polymers comprise a melting point that is lower than the decomposition point of the polyaramide fibers.Type: ApplicationFiled: June 30, 2010Publication date: October 4, 2012Applicant: EVONIK DEGUSSA GmbHInventors: Matthias Pascaly, Rolf-Walter Terwonne, Martin Schuster, Christian Hying
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Publication number: 20080190841Abstract: A flexible, ceramic membrane is useful as a separator for batteries, especially lithium batteries, the membrane containing a polymeric non-woven; a ceramic coating on and in the non-woven; wherein the ceramic coating comprises at least one oxide selected from the group consisting of Al2O3, TiO2, ZrO2, BaTiO3, SiO2, and mixtures thereof; wherein the coating comprises at least two fractions of oxides selected from the group consisting of Al2O3, TiO2, ZrO2, BaTiO3, SiO2, and mixtures thereof; a first ceramic fraction of the coating having been obtained from a sol; a second fraction of the coating comprising particles having an average particle size in the range from 200 nm to 5 ?m; wherein the first fraction is present as a layer on the particles of the second fraction; the coating comprising from 0.Type: ApplicationFiled: January 29, 2008Publication date: August 14, 2008Applicant: EVONIK DEGUSSA GmbHInventors: Matthias Pascaly, Rolf-Walter Terwonne, Christian Hying, Gerhard Hoerpel
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Patent number: 4798869Abstract: A process for the production of a thermoplastic composition for molded parts having improved impact resistance, transparency, surface gloss, and weatherability, and formed of a hard inner core of crosslinked polystyrene, a rubber-elastic intermediate layer of crosslinked polyacrylic ester, and an outer layer of polyvinyl chloride, wherein the inner core thereof is produced by the steps of:(a) forming a mixture, before or after addition of an initiator, under polymerization conditions in the presence of an emulsifier, of 0.01-5.Type: GrantFiled: November 7, 1986Date of Patent: January 17, 1989Assignee: Huels AktiengesellschaftInventors: Harald Sturm, Rolf-Walter Terwonne, Dieter Thunig
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Patent number: 4719265Abstract: A pourable polyvinyl chloride having an acrylate content of at least 30 percent by weight, is formed through a process wherein the emulsion polymerization of an acrylic acid ester forming soft polymers is conducted together with a diene crosslinking agent(a) in the presence of a fatty acid soap, or(b) by the batchwise or continuous addition of the monomer, pre-emulsified with an aqueous alkali lauryl sulfate solution, during polymerization, and by the addition of a fatty acid soap after polymerization, and the vinyl chloride polymerization is performed in the presence of a methylcellulose ether as the suspension agent; wherein, after addition of the suspension agent, a Ca(OH).sub.2 suspension is added, the polymerization charge is neutralized by addition of an acid, and then an organic peroxide is added as the initiator in a dissolved or suspended form. The polymerization can also take place without acid addition, by utilizing azo-type catalysts.Type: GrantFiled: March 26, 1986Date of Patent: January 12, 1988Assignee: Huels AktiengesellschaftInventors: Dieter Thunig, Rolf-Walter Terwonne