Patents by Inventor Lutz Brassat
Lutz Brassat 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: 11919994Abstract: The invention relates to a method for producing soft polyurethane foam obtained by reacting a composition containing a component A1 containing at least one filled polyol, a component A2 containing compounds reactive with isocyanates and having a hydroxyl value of ?20 to <100 mg KOH/g, the component A2 not containing any filled polyol, a component A3 containing water and/or at least one physical blowing agent, a component A4 containing auxiliary agents and additives, and a component B containing di- and/or polyisocyanates, characterized in that the reaction occurs in the presence of 0.5 to 3 parts by weight of an organic urea derivative as component C, which is obtained by reacting urea with a difunctional amine having a number-average molecular weight of 200 to 1000 g/mol. The invention also relates to a soft polyurethane foam obtainable by the method.Type: GrantFiled: May 7, 2020Date of Patent: March 5, 2024Assignee: Covestro Deutschland AGInventors: Matthaeus Gossner, Peter Haas, Michael Schedler, Sven Meyer-Ahrens, Lutz Brassat
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Publication number: 20220204681Abstract: The invention relates to a method for producing soft polyurethane foam obtained by reacting a composition containing a component A1 containing at least one filled polyol, a component A2 containing compounds reactive with isocyanates and having a hydroxyl value of ?20 to <100 mg KOH/g, the component A2 not containing any filled polyol, a component A3 containing water and/or at least one physical blowing agent, a component A4 containing auxiliary agents and additives, and a component B containing di- and/or polyisocyanates, characterized in that the reaction occurs in the presence of 0.5 to 3 parts by weight of an organic urea derivative as component C, which is obtained by reacting urea with a difunctional amine having a number-average molecular weight of 200 to 1000 g/mol. The invention also relates to a soft polyurethane foam obtainable by the method.Type: ApplicationFiled: May 7, 2020Publication date: June 30, 2022Inventors: Matthaeus Gossner, Peter Haas, Michael Schedler, Sven Meyer-Ahrens, Lutz Brassat
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Publication number: 20210024681Abstract: The invention relates to a method for producing polyurethane soft foams, in particular open-cell polyurethane soft foams based on polyether carbonate polyol and toluylene diisocyanate, wherein the resulting polyurethane soft foams have similar properties to the already known polyurethane soft foams and they are simpler and more sustainable in terms of their production.Type: ApplicationFiled: March 19, 2019Publication date: January 28, 2021Inventors: Matthaeus Gossner, Veronica-Alina Faerber, Lutz Brassat
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Publication number: 20210002412Abstract: The invention relates to a method for producing polyurethane soft foams having a volumetric weight according to DIN EIN ISO 845: 2009-10 from 50.0 to 80.0 kg/m3, in particular open-cell polyurethane soft foams based on polyether polyol and toluylene diisocyanate, having a high bulk density, wherein the resulting polyurethane foams have similar properties to the already known polyurethane soft foams, these being simpler and more sustainable in terms of their production.Type: ApplicationFiled: March 21, 2019Publication date: January 7, 2021Inventors: Matthaeus Gossner, Veronica-Alina Faerber, Lutz Brassat
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Publication number: 20180327537Abstract: The present invention concerns a method for producing polyurethane foams by reacting an isocyanate component with a component reactive to isocyanates, which comprises at least one polyether carbonate polyol, and wherein the reaction takes place in the presence of urea or derivatives thereof. Furthermore, the invention concerns polyurethane foams produced by the method according to the invention and their application.Type: ApplicationFiled: November 17, 2016Publication date: November 15, 2018Applicant: COVESTRO DEUTSCHLAND AGInventors: Matthäus GOSSNER, Lutz BRASSAT, Bert KLESCZEWSKI
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Publication number: 20180237577Abstract: The present invention relates to the use of a component A for the production of colour-stable polyurethane foams, containing A1?50 to ?100 weight parts of at least one polyether carbonate polyol with a hydroxyl number from ?20 mg KOH/g to ?300 mg KOH/g according to DIN 53240, A2?50 to ?0 weight parts of at least one polyether polyol with a hydroxyl number from ?20 mg KOH/g to ?250 mg KOH/g according to DIN 53240, wherein the polyether polyol is free from carbonate units, A3 0.5 to 25 weight parts, based on the sum of the weight parts of components A1 and A2, water and/or physical propellants, A4 0 to 10 weight parts, based on the sum of the weight parts of components A1 and A2, at least one antioxidant, A5 0 to 10 weight parts, based on the sum of the weight parts of components A1 and A2, adjuvants and additives, wherein all weight part data of the components A1 to A5 are scaled such that the sum of the weight parts A1+A2 is 100 in the composition.Type: ApplicationFiled: February 25, 2016Publication date: August 23, 2018Inventors: Lutz Brassat, Ralf Pohlig, Hans-Georg Pirkl
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Publication number: 20170327620Abstract: The present invention relates to a method for producing a viscoelastic polyurethane soft foam. The invention further relates to a viscoelastic polyurethane soft block foam or viscoelastic polyurethane soft molded foam having particularly high tensile strengths, which are produced by the method according to the invention, and to the use of said foams. The present invention further relates to polyol compositions which are suitable for the production of viscoelastic polyurethane foams.Type: ApplicationFiled: December 8, 2015Publication date: November 16, 2017Inventors: Matthäus Gossner, Lutz Brassat, Dieter Seidel
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Patent number: 9701805Abstract: The invention relates to a polyester polyol which contains building units which are derived from ethylene glycol and/or diethylene glycol and which is characterized in that the polyester polyol furthermore comprises building units which are derived from at least one long-chain polyester polyol with a number-average molar mass of 1500 to 8000 Da. The invention further relates to a process for the production thereof and use thereof, in particular for the production of rigid PUR/PIR foams.Type: GrantFiled: April 8, 2014Date of Patent: July 11, 2017Assignee: Covestro Deutschland AGInventors: Hartmut Nefzger, Uwe Kuenzel, Lutz Brassat
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Publication number: 20160304657Abstract: The present invention relates to a one-component reaction system for producing hard polyurethane foams, comprising the following constituents: A) an organic polyisocyanate component which is partially or entirely in prepolymer form, B) an isocyanate-reactive component, the functional groups of which are exclusively those having at least one Zerewitinoff-reactive hydrogen atom and optionally having at least one halogen atom, C) at least one stabilizer, D) at least one catalyst suitable for catalysing the reaction of the polyisocyanate component A) with the isocyanate-reactive component B), and E) optionally auxiliaries and additives and blowing agents and co-blowing agents, the reaction system being characterized in that the content of monomeric polyisocyanate is at most 1% by weight, and in that the organic polyisocyanate component A) has an isocyanate content of less than 8% by weight relative to the polyisocyanate component A).Type: ApplicationFiled: December 2, 2014Publication date: October 20, 2016Inventors: Reinhard ALBERS, Stephanie VOGEL, Lutz BRASSAT, Sabine DIPPE, Marion FROMMONT
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Publication number: 20160039988Abstract: The invention relates to a polyester polyol which contains building units which are derived from ethylene glycol and/or diethylene glycol and which is characterized in that the polyester polyol furthermore comprises building units which are derived from at least one long-chain polyester polyol with a number-average molar mass of 1500 to 8000 Da. The invention further relates to a process for the production thereof and use thereof, in particular for the production of rigid PUR/PIR foams.Type: ApplicationFiled: April 8, 2014Publication date: February 11, 2016Inventors: Hartmut Nefzger, Uwe Kuenzel, Lutz Brassat
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Patent number: 8334035Abstract: Polyester polyols are produced by reacting terephthalic acid with a glycol corresponding to the formula H—(OCH2CH2)n—OH and an aliphatic dicarboxylic acid. These polyester polyols are particularly useful for the production of polyurethane) (PUR) and polyurethane/polyisocyanurate (PUR/PIR) foams for use in insulation applications.Type: GrantFiled: March 27, 2010Date of Patent: December 18, 2012Assignee: Bayer MaterialScience AGInventors: Hartmut Nefzger, Erika Bauer, Uwe Kuenzel, Jürgen Schloβmacher, Lutz Brassat
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Publication number: 20120052228Abstract: Polyester polyols are produced by reacting terephthalic acid with a glycol corresponding to the formula H—(OCH2CH2)n—OH and an aliphatic dicarboxylic acid.Type: ApplicationFiled: March 27, 2010Publication date: March 1, 2012Applicant: BAYER MATERIALSCIENCE AGInventors: Hartmut Nefzger, Erika Bauer, Uwe Kuenzel, Jürgen Schlossmacher, Lutz Brassat
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Patent number: 7994345Abstract: The invention relates to a process for the purification of thiophenes by means of precipitation. The purified thiophenes are liquid at room temperature, have a purity of at least 99.50 wt. %, and are represented by the following general formula (I), wherein R1 and R2 independently of each other are, for example, a linear or branched C1-C20-alkyl group, or together form a fused C1-C20-dioxyalylene ring. The process involves: (I) precipitating the thiophene by cooling a solution of the thiophene and at least one solvent; or (II) precipitating the thiophene by adding the thiophene to a cooled solution of solvent and optionally the thiophene. The solutions are cooled to a temperature below the melting point of the thiophene.Type: GrantFiled: July 7, 2009Date of Patent: August 9, 2011Assignee: H. C. Starck GmbHInventors: Lutz Brassat, Stephan Kirchmeyer
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Publication number: 20100210748Abstract: The present invention relates to reactive polyurethane compositions having only small amounts of free, low molecular weight diisocyanates before and after crosslinking, and to the production thereof and the use thereof in reactive one- and two-component adhesives/sealants, bonding foams, encapsulating compounds and in flexible, rigid and integral foams.Type: ApplicationFiled: January 15, 2010Publication date: August 19, 2010Applicant: Bayer MaterialScience AGInventors: Marc Leimenstoll, Christos Karafilidis, Matthias Wintermantel, Peter Reichert, Lutz Brassat
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Publication number: 20090318710Abstract: The invention relates to a process for the purification of thiophenes by means of precipitation. The purified thiophenes are liquid at room temperature, have a purity of at least 99.50 wt. %, and are represented by the following general formula (I), wherein R1 and R2 independently of each other are, for example, a linear or branched C1-C20-alkyl group, or together form a fused C1-C20-dioxyalylene ring. The process involves: (I) precipitating the thiophene by cooling a solution of the thiophene and at least one solvent; or (II) precipitating the thiophene by adding the thiophene to a cooled solution of solvent and optionally the thiophene. The solutions are cooled to a temperature below the melting point of the thiophene.Type: ApplicationFiled: July 7, 2009Publication date: December 24, 2009Applicant: H. C. Starck GmbHInventors: Lutz Brassat, Stephan Kirchmeyer
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Publication number: 20060011907Abstract: The invention relates to compounds containing optionally substituted 3,4-methylenedioxythiophene units (thieno[3,4-d]-1,3-dioxole units), the production thereof and their use as organic semi-conductors.Type: ApplicationFiled: May 3, 2005Publication date: January 19, 2006Applicant: H. C. Starck GmbHInventors: Lutz Brassat, Stephan Kirchmeyer, Knud Reuter
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Publication number: 20050065352Abstract: The invention relates to a process for the purification of thiophenes by means of precipitation. The purified thiophenes are liquid at room temperature, have a purity of at least 99.50 wt. %, and are represented by the following general formula (I), wherein R1 and R2 independently of each other are, for example, a linear or branched C1-C20-alkyl group, or together form a fused C1-C20-dioxyalylene ring. The process involves: (I) precipitating the thiophene by cooling a solution of the thiophene and at least one solvent; or (II) precipitating the thiophene by adding the thiophene to a cooled solution of solvent and optionally the thiophene. The solutions are cooled to a temperature below the melting point of the thiophene.Type: ApplicationFiled: September 16, 2004Publication date: March 24, 2005Inventors: Lutz Brassat, Stephan Kirchmeyer
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Publication number: 20040053138Abstract: The invention relates to the use of cyano-substituted thiophenes as electrolyte additives for protecting nonaqueous, rechargeable lithium batteries from overcharging, and lithium batteries comprising these additives.Type: ApplicationFiled: September 12, 2003Publication date: March 18, 2004Inventors: Ralph Otterstedt, Stephan Kirchmeyer, Lutz Brassat