Patents by Inventor Stefan Dahmen
Stefan Dahmen 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: 20180319974Abstract: The invention relates to aqueous compositions comprising a) at least one polymer PALK in the form of dispersed polymer particles, wherein the polymer PALK is obtainable by ring-opening metathesis polymerization of at least one cyclic olefin monomer, and b) at least one polymer P2 in the form of dispersed polymer particles, wherein the polymer P2 comprises no olefinically unsaturated C—C-bond and has repeating units bearing at least one polar group. The aqueous compositions are suitable in particular for producing sheetings and barrier coatings having a very good barrier action toward gases, such as air, oxygen, nitrogen, argon, carbon dioxide, and in particular toward oxygen and oxygenous gases, such as air. The sheetings and coatings also have very good mechanical properties, in particular a high elongation at break coupled with good tear strength.Type: ApplicationFiled: November 11, 2016Publication date: November 8, 2018Applicant: BASF SEInventors: Theo SMIT, Norma Lidia NEGRETE HERRERA, Stefan DAHMEN, Bernhard STURM, Kevin MUELLER, Karl HAEBERLE
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Patent number: 9382395Abstract: The use of a certain copolymer is described for reducing the gas-permeability of rubber material. A rubber material provided with a barrier material in the form of the copolymer is also described. The copolymer can be produced via ring-opening metathesis polymerization of a) one first olefin monomer selected from the group consisting of cyclic olefin monomers having at least one endocyclic C—C double bond, where no tertiary carbon atom bearing a hydrogen atom is present in alpha-position to the double bond, and b) one second olefin monomer selected from the group consisting of cyclic olefin monomers having one endocyclic C—C double bond, where a tertiary carbon atom bearing a hydrogen atom is present in at least one alpha-position to the double bond, where the copolymer has been oxidized at least to some extent, where the amount of polycyclic olefin monomers used to produce the copolymer with at least two C—C double bonds is zero or less than 1 mol %, based on the entirety of the monomers.Type: GrantFiled: August 2, 2013Date of Patent: July 5, 2016Assignee: BASF SEInventors: Theo Smit, Kevin Mueller, Stefan Dahmen, Norma Lidia Negrete Herrera, Bernhard Sturm
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Patent number: 9359526Abstract: The use of an aqueous polyurethane dispersion adhesive is described for producing biodisintegratable composite foils where at least two substrates are adhesive-bonded to one another with use of the polyurethane dispersion adhesive, where at least one of the substrates is a biodisintegrable polymer foil. At least 60% by weight of the polyurethane is composed of diisocyanates, polyesterdiols, and at least one bifunctional carboxylic acid selected from dihydroxycarboxylic acids and diaminocarboxylic acids.Type: GrantFiled: November 13, 2014Date of Patent: June 7, 2016Assignee: BASF SEInventors: Cornelis Petrus Beyers, Heiko Diehl, Stefan Dahmen, Volker Kriegisch, Ulrike Licht, Axel Meyer, Motonori Yamamoto
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Publication number: 20150218328Abstract: The use of a certain copolymer is described for reducing the gas-permeability of rubber material. A rubber material provided with a barrier material in the form of the copolymer is also described. The copolymer can be produced via ring-opening metathesis polymerization of a) one first olefin monomer selected from the group consisting of cyclic olefin monomers having at least one endocyclic C—C double bond, where no tertiary carbon atom bearing a hydrogen atom is present in alpha-position to the double bond, and b) one second olefin monomer selected from the group consisting of cyclic olefin monomers having one endocyclic C—C double bond, where a tertiary carbon atom bearing a hydrogen atom is present in at least one alpha-position to the double bond, where the copolymer has been oxidized at least to some extent, where the amount of polycyclic olefin monomers used to produce the copolymer with at least two C—C double bonds is zero or less than 1 mol %, based on the entirety of the monomers.Type: ApplicationFiled: August 2, 2013Publication date: August 6, 2015Applicant: BASF SEInventors: Theo Smit, Kevin Müller, Stefan Dahmen, Norma Lidia Negrete Herrera, Bernhard Sturm
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Publication number: 20150072153Abstract: The use of an aqueous polyurethane dispersion adhesive is described for producing biodisintegratable composite foils where at least two substrates are adhesive-bonded to one another with use of the polyurethane dispersion adhesive, where at least one of the substrates is a biodisintegrable polymer foil. At least 60% by weight of the polyurethane is composed of diisocyanates, polyesterdiols, and at least one bifunctional carboxylic acid selected from dihydroxycarboxylic acids and diaminocarboxylic acids.Type: ApplicationFiled: November 13, 2014Publication date: March 12, 2015Applicant: BASF SEInventors: Cornelis Petrus BEYERS, Heiko DIEHL, Stefan DAHMEN, Volker KRIEGISCH, Ulrike LICHT, Axel MEYER, Motonori YAMAMOTO
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Patent number: 8956497Abstract: A method for producing biodisintegratable composite foils with an aqueous polyurethane dispersion adhesive. The method involves adhesive-bonding a first substrate to a second substrate with use of the aqueous polyurethane dispersion adhesive. At least one of the first substrate and the second substrate is made of a biodisintegratable polymer foil, and at least 60% by weight of the polyurethane contains diisocyanates, polyesterdiols, and bifunctional carboxylic acids. The bifunctional carboxylic acids are dihydroxycarboxylic acids or diaminocarboxylic acids.Type: GrantFiled: July 27, 2011Date of Patent: February 17, 2015Assignee: BASF SEInventors: Cornelis Petrus Beyers, Heiko Diehl, Stefan Dahmen, Volker Kriegisch, Ulrike Licht, Axel Meyer, Motonori Yamamoto
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Patent number: 8841369Abstract: A description is given of an aqueous polymer dispersion comprising at least one polyurethane, dispersed in aqueous phase and having one or more uretdione groups, and at least one solid polyamine with a deactivated surface, said dispersion being useful as an adhesive, coating material or sealant or for producing adhesive, coating or sealing compositions. The compositions can be activated thermally or by electromagnetic radiation.Type: GrantFiled: March 30, 2012Date of Patent: September 23, 2014Assignee: BASF SEInventors: Axel Meyer, Maria Teresa Hechavarria Fonseca, Tina Schroeder-Grimonpont, Stefan Dahmen, Christian Beil, Karl-Heinz Schumacher, Thomas Abend
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Publication number: 20140261084Abstract: A pigment is disclosed wherein the pigment includes a platy substrate or uniform platy substrate coated with an odd number of layers of alternating layers of high or low refractive index material, wherein each layer has a refractive index that differs from adjacent layers by at least 0.2; and the pigment has from about 40 to about 100% reflectance of light having a wavelength of 280 nm to 400 nm. Processes for making and using the pigments are also disclosed. These pigments can find application in paints, plastics, cosmetics, glass, printing inks, and glazes.Type: ApplicationFiled: March 12, 2014Publication date: September 18, 2014Inventors: Steven Jones, Markus Rueckel, Thomas Servay, Stefan Dahmen, Geoffrey Johnson
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Patent number: 8790753Abstract: A rubber material is described, modified with a barrier material in the form of a copolymer which can be produced via ring-opening metathesis polymerization of a) at least one olefin monomer selected from the group consisting of monocyclic olefin monomers having one or two endocyclic C—C double bonds and bicyclic olefin monomers having one endocyclic C—C double bond and b) at least one polycyclic olefin monomer having at least two C—C double bonds. The barrier material can be used to reduce the gas permeability of the rubber material.Type: GrantFiled: February 10, 2012Date of Patent: July 29, 2014Assignee: BASF SEInventors: Kevin Müller, Stefan Dahmen
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Publication number: 20120252926Abstract: A description is given of an aqueous polymer dispersion comprising at least one polyurethane, dispersed in aqueous phase and having one or more uretdione groups, and at least one solid polyamine with a deactivated surface, said dispersion being useful as an adhesive, coating material or sealant or for producing adhesive, coating or sealing compositions. The compositions can be activated thermally or by electromagnetic radiation.Type: ApplicationFiled: March 30, 2012Publication date: October 4, 2012Applicant: BASF SEInventors: Axel MEYER, Maria Teresa Hechavarria Fonseca, Tina Schröder-Grimonpont, Stefan Dahmen, Christian Beil, Karl-Heinz Schumacher, Thomas Abend
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Publication number: 20120205022Abstract: A rubber material is described, modified with a barrier material in the form of a copolymer which can be produced via ring-opening metathesis polymerization of a) at least one olefin monomer selected from the group consisting of monocyclic olefin monomers having one or two endocyclic C—C double bonds and bicyclic olefin monomers having one endocyclic C—C double bond and b) at least one polycyclic olefin monomer having at least two C—C double bonds. The barrier material can be used to reduce the gas permeability of the rubber material.Type: ApplicationFiled: February 10, 2012Publication date: August 16, 2012Applicant: BASF SEInventors: Kevin Müller, Stefan Dahmen
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Publication number: 20120077044Abstract: The use of an aqueous polyurethane dispersion adhesive is described for producing biodisintegratable composite foils where at least two substrates are adhesive-bonded to one another with use of the polyurethane dispersion adhesive, where at least one of the substrates is a biodisintegrable polymer foil. At least 60% by weight of the polyurethane is composed of diisocyanates, polyesterdiols, and at least one bifunctional carboxylic acid selected from dihydroxycarboxylic acids and diaminocarboxylic acids.Type: ApplicationFiled: July 27, 2011Publication date: March 29, 2012Applicant: BASF SEInventors: Cornelis Petrus BEYERS, Heiko Diehl, Stefan Dahmen, Volker Kriegisch, Ulrike Licht, Axel Meyer, Motonori Yamamoto
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Publication number: 20090247771Abstract: The present invention is directed to a process for the preparation of an enantiomerically enriched compound of formula II wherein, R1, R2 and R3 are each independently selected from hydrogen, halogen, substituted or unsubstituted lower alkyl or substituted or unsubstituted aryl; X is —C(?O)-Z or —Y, wherein —Y is selected from —CH2—OR4, —CH2-halogen or —CH2—NR6R7; wherein Z is selected from —NR6R7 or —OR5, wherein R5 is selected from hydrogen, substituted or unsubstituted lower alkyl or ester activating group; R4 is selected from hydrogen, hydroxyl protecting group or hydroxyl activating group; R6 and R7 are each independently selected from hydrogen, amino protecting group, amido protecting group or substituted or unsubstituted lower alkyl; or a pharmaceutically acceptable salt, complex or solvate thereof; which comprises an enantioselective addition with a thienyl zinc reagent, in the presence of a chiral ligand.Type: ApplicationFiled: February 27, 2007Publication date: October 1, 2009Inventors: Helmut Heinrich Buschmann, Antoni Torrens Jover, Matthias Lormann, Stefan Dahmen
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Patent number: 7109349Abstract: A process is described for the preparation of a precursor alcohol of Cizolirtine, (±)-2-[phenyl(1-methyl-1H-pyrazol-5-yl)methoxy]-N,N-dimethylethanamine and its enantiomers. The process involves the asymmetric addition of a metalated phenyl reagent to a pyrazolcarbaldehyde in the presence of a chiral ligand to yield chiral alcohols. The chiral alcohols are further O-alkylated to yield Cizolirtine or its enantiomers.Type: GrantFiled: January 24, 2005Date of Patent: September 19, 2006Assignee: Laboratorios Del Dr. Esteve, S/AInventors: Antoni Torrens Jover, Helmut H. Buschmann, Stefan Dahmen, Matthias Lormann
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Patent number: 7078531Abstract: A process is described for the preparation of a precursor alcohol of (±)-2-[thienyl(1-methyl-1H-pyrazol-5-yl)methoxy]-N,N-dimethyletanamine and in general for thienylazolylalcoxyethanamines and their enantiomers. The process involves asymmetric addition of a metalated thienyl reagent to a pyrazolcarbaldehyde in the presence of a chiral ligand to yield chiral alcohols. The chiral alcohols are further O-alkylated to yield the corresponding pharmaceutically active thienylazolylalcoxyethanamines.Type: GrantFiled: January 24, 2005Date of Patent: July 18, 2006Assignee: Laboratories Del Dr. Esteve, S.A.Inventors: Antoni Torrens Jover, Helmut H. Buschmann, Stefan Dahmen, Matthias Lormann
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Publication number: 20060135788Abstract: A process is described for the preparation of a precursor alcohol of Cizolirtine, (±)-2-[phenyl(1-methyl-1H-pyrazol-5-yl)methoxy]-N,N-dimethylethanamine and its enantiomers. The process involves the asymmetric addition of a metalated phenyl reagent to a pyrazolcarbaldehyde in the presence of a chiral ligand to yield chiral alcohols. The chiral alcohols are further O-alkylated to yield Cizolirtine or its enantiomers.Type: ApplicationFiled: January 24, 2005Publication date: June 22, 2006Inventors: Antoni Jover, Helmut Buschmann, Stefan Dahmen, Matthias Lormann
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Publication number: 20060135787Abstract: A process is described for the preparation of a precursor alcohol of (±)-2-[thienyl(1-methyl-1H-pyrazol-5-yl)methoxy]-N,N-dimethyletanamine and in general for thienylazolylalcoxyethanamines and their enantiomers. The process involves asymmetric addition of a metalated thienyl reagent to a pyrazolcarbaldehyde in the presence of a chiral ligand to yield chiral alcohols. The chiral alcohols are further O-alkylated to yield the corresponding pharmaceutically active thienylazolylalcoxyethanamines.Type: ApplicationFiled: January 24, 2005Publication date: June 22, 2006Inventors: Antoni Jover, Helmut Buschmann, Stefan Dahmen, Matthias Lormann