Patents by Inventor Lars Wittenbecher
Lars Wittenbecher 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: 9328058Abstract: The present invention provides a mixture comprising at least three hardener components a1), a2), and b), the ratio of hardener component a1) to a2) being in the range from 0.1 to 10:1, and hardener component b) being present at 5% to 55% by weight, based on the mixture, a process for preparing this mixture, the use of the mixture of the invention for curing epoxy resins, the use of the mixture of the invention with epoxy resins as adhesives, and an epoxy resin cured with the mixture of the invention.Type: GrantFiled: July 17, 2009Date of Patent: May 3, 2016Assignee: BASF SEInventors: Lars Wittenbecher, Michael Henningsen, Gregor Daun, Dieter Flick, Joerg-Peter Geisler, Juergen Schillgalies, Erhard Jacobi
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Patent number: 9012020Abstract: The present invention provides a blend comprising one or more epoxy resins and a mixture which comprises 0.3 to 0.9 amine equivalent, per equivalent of epoxide of the epoxy resin used, of a hardener component a) and as hardener component b) a compound of the formula I, a process for preparing this blend, the use of the blend of the invention for producing cured epoxy resin, and an epoxy resin cured with the blend of the invention.Type: GrantFiled: December 26, 2013Date of Patent: April 21, 2015Assignee: BASF SEInventors: Lars Wittenbecher, Michael Henningsen, Gregor Daun, Dieter Flick, Joerg-Peter Geisler, Juergen Schillgalies, Erhard Jacobi
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Patent number: 8852489Abstract: The present invention provides a process for producing moldings, the curing of the mold being carried out using a blend comprising one or more epoxy resins and a mixture, the curing component a) being used within the mixture in the range from 0.3 to 0.9 amine equivalent per equivalent of epoxide of the epoxy resin used, and the hardener component b) being a compound of the formula I.Type: GrantFiled: July 17, 2009Date of Patent: October 7, 2014Assignee: BASF SEInventors: Lars Wittenbecher, Michael Henningsen, Gregor Daun, Dieter Flick, Joerg-Peter Geisler, Juergen Schillgalies, Erhard Jacobi
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Patent number: 8741426Abstract: The present invention provides a blend comprising one or more epoxy resins and a mixture which comprises 0.3 to 0.9 amine equivalent, per equivalent of epoxide of the epoxy resin used, of a hardener component a) and as hardener component b) a compound of the formula I, a process for preparing this blend, the use of the blend of the invention for producing cured epoxy resin, and an epoxy resin cured with the blend of the invention.Type: GrantFiled: July 17, 2009Date of Patent: June 3, 2014Assignee: BASF SEInventors: Lars Wittenbecher, Michael Henningsen, Gregor Daun, Dieter Flick, Joerg-Peter Geisler, Juergen Schillgalies, Erhard Jacobi
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Patent number: 8399596Abstract: The preparation of epoxy resin compositions which comprise glycidyl ethers comprising cyclohexyl groups and have a low oligomer content is carried out by distillation of compositions which are obtainable by ring hydrogenation of compounds of the general formula (I) where —X— is —CR2—, —CO—, —O, —S—, —SO2—, the radicals R are each, independently of one another, H, C1-6-alkyl, C3-6-cycloalkyl, in which one or more H atoms can be replaced by halogen, the radicals R? are each, independently of one another, C1-4-alkyl, halogen, the indices n are each, independently of one another, 0, 1, 2 or 3, and subsequent reaction of the hydroxyl groups with epichlorohydrin, in thin film evaporators or short path evaporators at a temperature in the range from 150 to 270° C. and a pressure in the range from 0.001 to 1 mbar.Type: GrantFiled: November 30, 2007Date of Patent: March 19, 2013Assignee: BASF AktiengesellschaftInventors: Michael Henningsen, Lars Wittenbecher
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Patent number: 8247517Abstract: The use of 1,3-substituted imidazolium salts of the formula I in which R1 and R3 independently of one another are an organic radical having 1 to 20 C atoms, R2, R4, and R5 independently of one another are an H atom or an organic radical having 1 to 20 C atoms, it also being possible for R4 and R5 together to form an aliphatic or aromatic ring, and X is a dicyanamide anion as latent catalysts for curing compositions comprising epoxy compounds.Type: GrantFiled: June 9, 2008Date of Patent: August 21, 2012Assignee: BASF SEInventors: Lars Wittenbecher, Michael Henningsen, Georg Degen, Matthias Maase, Manfred Doering, Ulrich Arnold
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Patent number: 8202580Abstract: 1,3-substituted imidazolium salts of the formula I are used as latent catalysts for curing compostions comprising epoxy compounds: in which: R1 and R3 independently of one another are an organic radical having 1 to 20 C atoms; R2, R4, and R5 independently of one another are an H atom or an organic radical having 1 to 20 C atoms, it also being possible for R4 and R5 together to form an aliphatic or aromatic ring; X is the anion of a phosphorus oxyacid, and n is 1, 2 or 3.Type: GrantFiled: June 6, 2008Date of Patent: June 19, 2012Assignee: BASF SEInventors: Lars Wittenbecher, Georg Degen, Michael Henningsen, Matthias Maase, Manfred Doering, Ulrich Arnold
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Patent number: 8193297Abstract: The use of 1,3-substituted imidazolium salts of the formula I in which R1 and R3 independently of one another are an organic radical having 1 to 20 C atoms, R2, R4, and R5 independently of one another are an H atom or an organic radical having 1 to 20 C atoms, it also being possible for R4 and R5 together to form an aliphatic or aromatic ring, and X is a thiocyanate anion as latent catalysts for curing compositions comprising epoxy compounds.Type: GrantFiled: June 6, 2008Date of Patent: June 5, 2012Assignee: BASF SEInventors: Lars Wittenbecher, Matthias Maase, Georg Degen, Michael Henningsen, Manfred Doering, Ulrich Arnold
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Patent number: 8053546Abstract: The use of 1,3-substituted imidazolium salts of the formula I in which R1 and R3 independently of one another are an organic radical having 1 to 20 C atoms, R2, R4, and R5 independently of one another are an H atom or an organic radical having 1 to 20 C atoms, it also being possible for R4 and R5 together to form an aliphatic or aromatic ring, X is an anion having a pKb of less than 13 (measured at 25° C., 1 bar in water or dimethyl sulfoxide), and n is 1, 2 or 3, with the exception as imidazolium salts of 1-ethyl-2,3-dimethylimidazolium acetate and 1-ethyl-2,3-dimethylimidazolium acetate-acetic acid complex, as latent catalysts for curing compositions comprising epoxy compounds.Type: GrantFiled: June 6, 2008Date of Patent: November 8, 2011Assignee: BASF SEInventors: Georg Degen, Matthias Maase, Lars Wittenbecher, Manfred Döring, Ulrich Arnold
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Patent number: 8038975Abstract: A process for preparing crystalline hydroxylamine-O-sulfonic acid by a. reacting hydroxylamine or a hydroxylammonium salt with oleum/sulfuric acid or with chlorosulfonic acid/sulfuric acid at a temperature in the range from 90 to 130° C., b. continuing to stir the reaction mixture at a temperature in the range from 90 to 130° C. for a period of from 2 to 24 hours, c. cooling the reaction mixture to a temperature in the range from 10 to 40° C. within a period of from 1 to 12 hours and d. subsequently removing and washing the hydroxylamine-O-sulfonic acid which has crystallized out.Type: GrantFiled: January 21, 2008Date of Patent: October 18, 2011Assignee: BASF SEInventors: Lars Wittenbecher, Reinhold Goth
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Publication number: 20110190419Abstract: The present invention provides a blend comprising one or more epoxy resins and a mixture which comprises 0.3 to 0.9 amine equivalent, per equivalent of epoxide of the epoxy resin used, of a hardener component a) and as hardener component b) a compound of the formula I, a process for preparing this blend, the use of the blend of the invention for producing cured epoxy resin, and an epoxy resin cured with the blend of the invention.Type: ApplicationFiled: July 17, 2009Publication date: August 4, 2011Applicant: BASF SEInventors: Lars Wittenbecher, Michael Henningsen, Gregor Daun, Dieter Flick, Joerg-Peter Geisler, Juergen Schillgalies, Erhard Jacobi
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Publication number: 20110180970Abstract: The present invention provides a process for producing moldings, the curing of the mold being carried out using a blend comprising one or more epoxy resins and a mixture, the curing component a) being used within the mixture in the range from 0.3 to 0.9 amine equivalent per equivalent of epoxide of the epoxy resin used, and the hardener component b) being a compound of the formula I.Type: ApplicationFiled: July 17, 2009Publication date: July 28, 2011Applicant: BASF SEInventors: Lars Wittenbecher, Michael Henningsen, Gregor Daun, Dieter Flick, Joerg-Peter Geisler, Juergen Schillgalies, Erhard Jacobi
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Publication number: 20110130524Abstract: The present invention provides a mixture comprising at least three hardener components a1), a2), and b), the ratio of hardener component a1) to a2) being in the range from 0.1 to 10:1, and hardener component b) being present at 5% to 55% by weight, based on the mixture, a process for preparing this mixture, the use of the mixture of the invention for curing epoxy resins, the use of the mixture of the invention with epoxy resins as adhesives, and an epoxy resin cured with the mixture of the invention.Type: ApplicationFiled: July 17, 2009Publication date: June 2, 2011Applicant: BASF SEInventors: Lars Wittenbecher, Michael Henningsen, Gregor Daun, Dieter Flick, Joerg-Peter Geisler, Juergen Schillgalies, Erhard Jacobi
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Patent number: 7777059Abstract: Copper (I) formate complexes of general formula LnCu(HCOO).x COOH are decomposed in order to separate metallic copper, wherein x is a number from 0 to 10, n amounts to, 2, 3 or 4 and the n ligands L represent, independent of one another, one of the following ligands: a phosphane of formula R1R2R3P; a phosphite of formula (R1O)(R2O)(R3O)P; an isocyanide of formula R1—NC; an alkene of general formula R1R2C?CR3R4; or an alkyne of general formula R1C?CR2; wherein R1, R2, R3 and R4 represent, independent of one another, hydrogen, a linear or branched, optionally partly or fully fluorinated alkyl, aminoalkyl, alkyoxialkyl, hydroxialkyl, phosphinoalkyl or aryl radical having up to 20 carbon atoms, with the exception of triphenylphosphino-copper (I) formate and 1,1,1-tris(diphenylphosphinomethyl)ethane-copper (I) formate.Type: GrantFiled: December 15, 2004Date of Patent: August 17, 2010Assignee: BASF SEInventors: Lars Wittenbecher, Heinrich Lang, Yingzhong Shen
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Publication number: 20100187715Abstract: The use of 1,3-substituted imidazolium salts of the formula I in which R1 and R3 independently of one another are an organic radical having 1 to 20 C atoms, R2, R4, and R5 independently of one another are an H atom or an organic radical having 1 to 20 C atoms, it also being possible for R4 and R5 together to form an aliphatic or aromatic ring, X is an anion having a pKb of less than 13 (measured at 25° C., 1 bar in water or dimethyl sulfoxide), and n is 1, 2 or 3, with the exception as imidazolium salts of 1-ethyl-2,3-dimethylimidazolium acetate and 1-ethyl-2,3-dimethylimidazolium acetate-acetic acid complex, as latent catalysts for curing compositions comprising epoxy compounds.Type: ApplicationFiled: June 6, 2008Publication date: July 29, 2010Applicant: BASF SEInventors: Georg Degen, Matthias Maase, Lars Wittenbecher, Manfred Doering, Ulrich Arnold
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Publication number: 20100184925Abstract: The use of 1,3-substituted imidazolium salts of the formula I in which R1 and R3 independently of one another are an organic radical having 1 to 20 C atoms, R2, R4, and R5 independently of one another are an H atom or an organic radical having 1 to 20 C atoms, it also being possible for R4 and R5 together to form an aliphatic or aromatic ring, and X is a dicyanamide anion as latent catalysts for curing compositions comprising epoxy compounds.Type: ApplicationFiled: June 9, 2008Publication date: July 22, 2010Applicant: BASF SEInventors: Lars Wittenbecher, Michael Henningsen, Georg Degen, Matthias Maase, Manfred Doering, Ulrich Arnold
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Publication number: 20100179299Abstract: The use of 1,3-substituted imidazolium salts of the formula I in which R1 and R3 independently of one another are an organic radical having 1 to 20 C atoms, R2, R4, and R5 independently of one another are an H atom or an organic radical having 1 to 20 C atoms, it also being possible for R4 and R5 together to form an aliphatic or aromatic ring, and X is a thiocyanate anion as latent catalysts for curing compositions comprising epoxy compounds.Type: ApplicationFiled: June 6, 2008Publication date: July 15, 2010Applicant: BASF SEInventors: Lars Wittenbecher, Matthias Maase, Georg Degen, Michael Henningsen, Manfred Doering, Ulrich Arnold
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Publication number: 20100166971Abstract: The use of 1,3-substituted imidazolium salts of the formula I in which R1 and R3 independently of one another are an organic radical having 1 to 20 C atoms, R2, R4, and R5 independently of one another are an H atom or an organic radical having 1 to 20 C atoms, it also being possible for R4 and R5 together to form an aliphatic or aromatic ring, X is the anion of a phosphorus oxyacid, and n is 1, 2 or 3, as latent catalysts for curing compositions comprising epoxy compounds.Type: ApplicationFiled: June 6, 2008Publication date: July 1, 2010Applicant: BASF SEInventors: Lars Wittenbecher, Georg Degen, Michael Henningsen, Matthias Maase, Manfred Doering, Ulrich Arnold
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Publication number: 20100111807Abstract: A process for preparing crystalline hydroxylamine-O-sulfonic acid by a. reacting hydroxylamine or a hydroxylammonium salt with oleum/sulfuric acid or with chiorosulfonic acid/sulfuric acid at a temperature in the range from 90 to 130° C., b. continuing to stir the reaction mixture at a temperature in the range from 90 to 130° C. for a period of from 2 to 24 hours, c. cooling the reaction mixture to a temperature in the range from 10 to 40° C. within a period of from 1 to 12 hours and d. subsequently removing and washing the hydroxylamine-O-sulfonic acid which has crystallized out.Type: ApplicationFiled: January 21, 2008Publication date: May 6, 2010Applicant: BASF SE Patents, Trademarks and LicensesInventors: Lars Wittenbecher, Reinhold Goth
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Publication number: 20100105856Abstract: The preparation of epoxy resin compositions which comprise glycidyl ethers comprising cyclohexyl groups and have a low oligomer content is carried out by distillation of compositions which are obtainable by ring hydrogenation of compounds of the general formula (I) where -X- is —CR2—, —CO—, —O, —S—, —SO2—, the radicals R are each, independently of one another, H, C1-6-alkyl, C3-6-cycloalkyl, in which one or more H atoms can be replaced by halogen, the radicals R? are each, independently of one another, C1-4-alkyl, halogen, the indices n are each, independently of one another, 0, 1, 2 or 3, and subsequent reaction of the hydroxyl groups with epichlorohydrin, in thin film evaporators or short path evaporators at a temperature in the range from 150 to 270° C. and a pressure in the range from 0.001 to 1 mbar.Type: ApplicationFiled: November 30, 2007Publication date: April 29, 2010Applicant: BASF SEInventors: Michael Henningsen, Lars Wittenbecher