Patents by Inventor Dirk Kempfert
Dirk Kempfert 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: 20190389999Abstract: The present invention relates to thermoplastic polyurethanes obtainable or obtained by reaction of at least one polyisocyanate composition, at least one chain extender (KV1) of general formula (I) and one further chain extender (KV2) selected from the group consisting of compounds having at least two isocyanate-reactive groups having a molecular weight of <500 g/mol, and at least one polyol composition. The present invention further relates to a production process for such thermoplastic polyurethanes and to the use of a thermoplastic polyurethane according to the invention or of a thermoplastic polyurethane obtainable or obtained by a process according to the invention for producing extrusion products, films and molded articles.Type: ApplicationFiled: February 13, 2018Publication date: December 26, 2019Applicant: BASF SEInventors: Nabarun ROY, Fin LAMMERS, Dirk KEMPFERT, Elmar POESELT
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Publication number: 20190367660Abstract: The present invention relates to thermoplastic polyurethanes obtainable or obtained by reaction of at least one polyisocyanate composition which comprises 4,4?-MDI and at least one further polyisocyanate, at least one chain extender of general formula (I) and at least one polyol composition. The present invention further relates to a production process for such thermoplastic polyurethanes and to the use of a thermoplastic polyurethane according to the invention or of a thermoplastic polyurethane obtainable or obtained by a process according to the invention for producing extrusion products, films and molded articles.Type: ApplicationFiled: February 13, 2018Publication date: December 5, 2019Applicant: BASF SEInventors: Nabarun ROY, Elmar POESELT, Dirk KEMPFERT, Fin LAMMERS
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Patent number: 10329374Abstract: The present invention relates to a process for preparing a thermoplastic copolymer from polycaprolactam and thermoplastic polyurethane (TPU), to thermoplastic copolymers thus obtained and to shaped articles formed from copolymers of this type.Type: GrantFiled: January 30, 2015Date of Patent: June 25, 2019Assignee: BASF SEInventors: Philippe Desbois, Rajan Hollmann, Dirk Kempfert, Bernd Bruchmann, Frank Thielbeer, Rolf Muelhaupt
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Publication number: 20190055341Abstract: The present invention relates to a process for producing a diblock copolymer comprising the reaction of at least one aromatic polyester having a melting point in the range from 160° C. to 350° C. and at least one polymer diol having a melting point of less than 100° C. at a temperature of greater than 200° C. to obtain a mixture (G-a); and the reaction of the mixture (G-a) with at least one diisocyanate, wherein the diisocyanate is employed in a molar amount of at least 0.9 based on the alcohol groups of the polymer diols. The present invention further relates to diblock copolymers obtained or obtainable according to such a process and to the use of such diblock copolymers for producing extruded, injection molded and pressed articles and also foams, cable sheaths, hoses, profiles, drive belts, fibers, nonwovens, films, moldings, plugs, housings, damping elements for the electricals industry, automotive industry, mechanical engineering, 3-D printing, medicine and consumer goods.Type: ApplicationFiled: February 22, 2017Publication date: February 21, 2019Applicant: BASF SEInventors: Frank PRISSOK, Elmar POESELT, Dirk KEMPFERT, Florian PUCH, Martina SCHOEMER
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Publication number: 20180319981Abstract: The present invention relates to a method for producing a thermoplastic polyurethane that comprises reacting an isocyanate composition at least comprising 4,4?-diisocyanatodicyclohexylmethane (H12MDI) with a polyol composition (PZ) in the presence of a catalyst composition at least comprising a bismuth-containing compound selected from bismuth (tricarboxylate) catalysts, where the carboxyl radicals independently of one another have 6 to 12 carbon atoms, to give a melt and producing pellets from the resulting melt. The present invention further relates to a thermoplastic polyurethane obtained or obtainable by the method of the invention, and also to the use for producing films, profiles, cable sheathing, and sheathing of LED strips.Type: ApplicationFiled: October 14, 2016Publication date: November 8, 2018Applicant: BASF SEInventors: Oliver Steffen HENZE, Dirk KEMPFERT
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Publication number: 20180265621Abstract: The present invention relates to a thermoplastic polyurethane obtainable or obtained by the conversion of at least a polyisocyanate composition, ethane-1,2-diol as chain extender and a polyol composition, wherein no further chain extender is used aside from ethane-1,2-diol, to a process for preparing such a thermoplastic polyurethane, and to the use of such a polyurethane for production of injection molded products, extrusion products, films and shaped bodies.Type: ApplicationFiled: September 20, 2016Publication date: September 20, 2018Applicant: BASF SEInventors: Elmar POESELT, Dirk KEMPFERT
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Publication number: 20170233520Abstract: The present invention relates to a thermoplastic polyurethane obtainable or obtained by the conversion of at least a polyisocyanate composition, propane-1,3-diol as chain extender and a polyol composition, wherein no further chain extender is used aside from propane-1,3-diol, to a process for preparing such a thermoplastic polyurethane, and to the use of such a polyurethane for production of injection molded products, extrusion products, films and shaped bodies.Type: ApplicationFiled: March 25, 2015Publication date: August 17, 2017Applicant: BASF SEInventors: Elmar POESELT, Dieter NITSCHKE, Birte LAHRMANN, Dirk KEMPFERT
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Publication number: 20160340465Abstract: The present invention relates to a process for preparing a thermoplastic copolymer from polycaprolactam and thermoplastic polyurethane (TPU), to thermoplastic copolymers thus obtained and to shaped articles formed from copolymers of this type.Type: ApplicationFiled: January 30, 2015Publication date: November 24, 2016Applicant: BASF SEInventors: Philippe DESBOIS, Rajan HOLLMANN, Dirk KEMPFERT, Bernd BRUCHMANN, Frank THIELBEER, Rolf MUELHAUPT
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Publication number: 20160260516Abstract: The invention relates to a composition comprising a thermoplastic polyurethane, where the thermoplastic polyurethane has been prepared from a) a diisocyanate, b) a polyol comprising a polyol A and a polyol B and c) a chain extender, optionally with the aid of catalysts and optionally further comprising additives and/or auxiliaries, and a salt and/or an ionic liquid, preferably an ionic liquid, is comprised in the composition and the polyol A comprises ethoxy and propoxy groups and the polyol B comprises butoxy groups.Type: ApplicationFiled: October 14, 2014Publication date: September 8, 2016Applicant: BASF SEInventors: Frank SCHAEFER, Ernst MINDER, Dirk KEMPFERT, Christoph BAHR, Cornelia HINRICHS, Anja OLTMANNS
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Publication number: 20160244587Abstract: The invention relates to a process for production of expanded thermoplastic elastomer, said process comprising the steps of: (e) adding monomers and/or oligomers used for producing the thermoplastic elastomer with or without further starting materials into a first stage of a polymer-processing machine, (f) mixing the monomers and/or oligomers and also the optionally added further starting materials and reacting the monomers and/or oligomers to give a polymer melt in the first stage of the polymer-processing machine, (g) passing the polymer melt into a second stage of a polymer-processing machine and adding a physical blowing agent with or without further starting materials to obtain a polymer melt comprising a blowing agent, (h) molding the polymer melt comprising a blowing agent into an expanded thermoplastic elastomer.Type: ApplicationFiled: October 17, 2014Publication date: August 25, 2016Inventors: Peter GUTMANN, Christian DÄSCHLEIN, Jürgen AHLERS, Elke MARTEN, Torben KAMINSKY, Dirk KEMPFERT
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Patent number: 9416213Abstract: A process for producing a polycarbodiimide, comprising polymerizing a diisocyanate in the presence of a carbodiimidization catalyst in a reaction vessel in liquid phase at a temperature in the range of from 20 to 250° C., at a pressure in the range of from 20 to 800 mbar and in the presence of at least one inert gas, wherein the at least one inert gas is introduced into the liquid phase in the reaction vessel with a flow rate in the range of from 0.1 x/h to 100 x/h, x being the volume of the reaction vessel.Type: GrantFiled: September 19, 2013Date of Patent: August 16, 2016Assignee: BASF SEInventors: Markus Bubolz, Karl Haeberle, Kai Henke, Dirk Kempfert, Markus Kraemer, Sven Lawrenz, Frank Schaefer, Maria Thomas, Ulrich Treuling
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Publication number: 20150232605Abstract: A process for producing a polycarbodiimide, comprising polymerizing a diisocyanate in the presence of a carbodiimidization catalyst in a reaction vessel in liquid phase at a temperature in the range of from 20 to 250° C., at a pressure in the range of from 20 to 800 mbar and in the presence of at least one inert gas, wherein the at least one inert gas is introduced into the liquid phase in the reaction vessel with a flow rate in the range of from 0.1 x/h to 100 x/h, x being the volume of the reaction vessel.Type: ApplicationFiled: September 19, 2013Publication date: August 20, 2015Applicant: BASF SEInventors: Markus Bubolz, Karl Haeberle, Kai Henke, Dirk Kempfert, Markus Kraemer, Sven Lawrenz, Frank Schaefer, Maria Thomas, Ulrich Treuling
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Publication number: 20150133610Abstract: The invention refers to a thermoplastic polyurethane produced from at least an organic diisocyanate and a compound which is reactive toward isocyanates, wherein the polyurethane comprises the ester of a tricarboxylic acid with at least one alcohol and wherein all acid groups of the tricarboxylic acid are esterified with an alcohol. The invention further refers to a process for producing the respective polyurethane, products comprising this thermoplastic polyurethane and the use of the ester of a tricarboxylic acid as plasticizer in thermoplastic polyurethanes.Type: ApplicationFiled: January 20, 2015Publication date: May 14, 2015Applicant: BASF SEInventors: Bin-Eric CHEN, Frank Schaefer, Dirk Kempfert, Christoph Bahr, Guenter Scholz, Teruya Ohkuwa, Martin Vallo, Carsten Guenther, Harald Schulz, Yasuyuki Suzuki, Tien Kuan Lim
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Patent number: 8993690Abstract: The invention refers to a thermoplastic polyurethane produced from at least an organic diisocyanate and a compound which is reactive toward isocyanates, wherein the polyurethane comprises the ester of a tricarboxylic acid with at least one alcohol and wherein all acid groups of the tricarboxylic acid are esterified with an alcohol. The invention further refers to a process for producing the respective polyurethane, products comprising this thermoplastic polyurethane and the use of the ester of a tricarboxylic acid as plasticizer in thermoplastic polyurethanes.Type: GrantFiled: April 26, 2010Date of Patent: March 31, 2015Assignee: BASF SEInventors: Bin-Eric Chen, Frank Schaefer, Dirk Kempfert, Christoph Bahr, Guenter Scholz, Teruya Ohkuwa, Martin Vallo, Carsten Guenther, Harald Schulz, Yasuyuki Suzuki, Tien Kuan Lim
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Patent number: 8455608Abstract: The invention relates to a process for preparing a thermoplastic polyisocyanate polyaddition product based on polyisocyanate (i) and compounds which are reactive toward polyisocyanate, with or without the use of chain extenders, a first catalyst (iv) and/or auxiliaries and/or additives (v), wherein a second catalyst is initially vaporized and then applied to the polyisocyanate polyaddition product by condensation, and to the products prepared therefrom.Type: GrantFiled: February 25, 2011Date of Patent: June 4, 2013Assignee: BASF SEInventors: Torben Kaminsky, Dirk Kempfert
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Publication number: 20120059141Abstract: The invention relates to a process for preparing a thermoplastic polyisocyanate polyaddition product based on polyisocyanate (i) and compounds which are reactive toward polyisocyanate, with or without the use of chain extenders, a first catalyst (iv) and/or auxiliaries and/or additives (v), wherein a second catalyst is initially vaporized and then applied to the polyisocyanate polyaddition product by condensation, and to the products prepared therefrom.Type: ApplicationFiled: February 25, 2011Publication date: March 8, 2012Applicant: BASF SEInventors: Torben Kaminsky, Dirk Kempfert
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Publication number: 20120041119Abstract: The invention refers to a thermoplastic polyurethane produced from at least an organic diisocyanate and a compound which is reactive toward isocyanates, wherein the polyurethane comprises the ester of a tricarboxylic acid with at least one alcohol and wherein all acid groups of the tricarboxylic acid are esterified with an alcohol. The invention further refers to a process for producing the respective polyurethane, products comprising this thermoplastic polyurethane and the use of the ester of a tricarboxylic acid as plasticizer in thermoplastic polyurethanes.Type: ApplicationFiled: April 26, 2010Publication date: February 16, 2012Applicant: BASF SEInventors: Bin-Eric Chen, Frank Schaefer, Dirk Kempfert, Christoph Bahr, Guenter Scholz, Teruya Ohkuwa, Martin Vallo, Carsten Guenther, Harald Schulz, Yasuyuki Suzuki, Lim Tien Kuan
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Publication number: 20110245449Abstract: The invention relates to an improved method of melt adhesive bonding on the basis of a thermoplastic polyurethane using a thermoplastic polyurethane (TPU) obtainable from essentially a symmetrical aliphatic diisocyanate A and at least one isocyanate-reactive compound B comprising hydroxyl and/or amino groups as an adhesive, wherein the number-average molecular weight (Mn) of compound B is at least 2200 g/mol, with the proviso that it is at least 950 g/mol if compound B is a sebacic ester, diisocyanate A and at least one isocyanate-reactive compound B are reacted in the presence of a catalyst for the polyaddition reaction, the TPU comprises no chain extender, the TPU has an index IN of less than 1000, preferably of less than 990, and more preferably of less than 980, and melt adhesive bonding by the TPU in melt state takes place at a temperature from 50° C. to 160° C. in the absence of solvents, and to substrates bonded therewith.Type: ApplicationFiled: March 28, 2011Publication date: October 6, 2011Applicant: BASF SEInventors: Marine BOUDOU, Oliver Steffen Henze, Dirk Kempfert