Patents by Inventor Juergen DEMETER
Juergen DEMETER 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: 20210292461Abstract: The present invention relates to a method for the deactivation of an acid catalyst during the production process of a polyoxymethylene copolymer (cPOM) by adding triisopropanolamine (tris(2-hydroxypropyl)amine) to a mixture which comprises the polyoxymethylene copolymer (cPOM) and the acid catalyst.Type: ApplicationFiled: July 10, 2019Publication date: September 23, 2021Inventors: Thomas HEITZ, Juergen DEMETER, Anna Karina MOELLER, Cho IN-GI
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Publication number: 20210214494Abstract: The present invention relates to a method for the production of a colored polyoxymethylene copolymer by mixing a raw polyoxymethylene copolymer in particulate form, comprising 2 to 30% by weight of unreacted residual monomers, with a coloring agent in particulate form, in a degassing apparatus. In addition, the present invention relates to the colored polyoxymethylene copolymer obtainable by the process and the use of the colored polyoxymethylene copolymer for the production of molding parts.Type: ApplicationFiled: May 8, 2019Publication date: July 15, 2021Inventors: Thomas HEITZ, Jürgen DEMETER, Jin-Sang CHOI
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Patent number: 9765172Abstract: The patent application relates to a process for preparing polyoxymethylene by polymerization of a reaction mixture (RG) which comprises at least one formaldehyde source and at least one initiator mixture (IG), wherein the initiator mixture (IG) comprises at least one polymerization initiator and at least one solvent of the general formula (I) R1—O—[—R3—O—]m—R2??(I), where m is 1, 2, 3 or 4; R1 and R2 are each, independently of one another, C3-C6-alkyl; R3 is C1-C5-alkylene.Type: GrantFiled: May 26, 2014Date of Patent: September 19, 2017Assignee: BASF SEInventors: Laurence Pottie, Juergen Demeter, Marie-Claire Hermant
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Publication number: 20160115270Abstract: The patent application relates to a process for preparing polyoxymethylene by polymerization of a reaction mixture (RG) which comprises at least one formaldehyde source and at least one initiator mixture (IG), wherein the initiator mixture (IG) comprises at least one polymerization initiator and at least one solvent of the general formula (I) R1—O—[—R3—O—]m—R2??(I), where m is 1, 2, 3 or 4; R1 and R2 are each, independently of one another, C3-C6-alkyl; R3 is C1-C5-alkylene.Type: ApplicationFiled: May 26, 2014Publication date: April 28, 2016Applicant: BASF SEInventors: Laurence POTTIE, Juergen DEMETER, Marie-Claire HERMANT
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Patent number: 8859721Abstract: The invention relates to a process for working up particulate crude polyoxymethylene, which comprises the following steps: (a) introduction of the particulate crude polyoxymethylene into an extraction column (13) operated at a pressure in the range from 1 to 6 bar, (b) introduction of a polar extractant into the extraction column (13) with a temperature in the range from 95 to 140° C. and a pressure in the range from 1 to 6 bar, wherein from 10 to 1000 ppm, based on the amount of polar extractant introduced, of a buffer substance which buffers in the pH range from 7.5 to 11.5 are introduced into the extraction column (13).Type: GrantFiled: August 9, 2012Date of Patent: October 14, 2014Assignee: BASF SEInventors: Jürgen Deininger, Jürgen Demeter, Rüdiger Häffner, Ralf Schulz, Achim Stammer
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Patent number: 8795833Abstract: The invention relates to a polyoxymethylene (POM) powder for use in a selective laser sintering process and having the following parameters: Isothermal crystallization time (at 152° C.) >3 min Mn from 22 000 to 25 000 g/mol Mw from 60 000 to 140 000 g/mol Mw/Mn from 3 to 5 MVR from 15 to 70 [cm3/10 min] d50 average particle size 60 ?m Particle size from 30 to 130 ?m. A process for producing the powder, and also moldings produced from this powder by a selective laser sintering process, are also described.Type: GrantFiled: October 26, 2010Date of Patent: August 5, 2014Assignee: BASF SEInventors: Claus Dallner, Steffen Funkhauser, Frank Müller, Jürgen Demeter, Mark Völkel
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Publication number: 20130041126Abstract: The invention relates to a process for working up particulate crude polyoxymethylene, which comprises the following steps: (a) introduction of the particulate crude polyoxymethylene into an extraction column (13) operated at a pressure in the range from 1 to 6 bar, (b) introduction of a polar extractant into the extraction column (13) with a temperature in the range from 95 to 140° C. and a pressure in the range from 1 to 6 bar, wherein from 10 to 1000 ppm, based on the amount of polar extractant introduced, of a buffer substance which buffers in the pH range from 7.5 to 11.5 are introduced into the extraction column (13).Type: ApplicationFiled: August 9, 2012Publication date: February 14, 2013Applicant: BASF SEInventors: Jürgen Deininger, Jürgen Demeter, Rüdiger Häffner, Ralf Schulz, Achim Stammer
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Patent number: 8268955Abstract: Polyamide containing a compound which bears at least one hydroxy group and has chemical bonding by way of an amide group to the end of the polymer chain, process for preparing this polyamide, and also fibers, films, and moldings, comprising at least one such polyamide.Type: GrantFiled: October 28, 2003Date of Patent: September 18, 2012Assignee: BASF SEInventors: Helmut Winterling, Jürgen Demeter, Kurt Krempel
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Publication number: 20120208011Abstract: The invention relates to a polyoxymethylene (POM) powder for use in a selective laser sintering process and having the following parameters: Isothermal crystallization time (at 152° C.) >3 min Mn from 22 000 to 25 000 g/mol Mw from 60 000 to 140 000 g/mol Mw/Mn from 3 to 5 MVR from 15 to 70 [cm3/10 min] d50 average particle size 60 ?m Particle size from 30 to 130 ?m. A process for producing the powder, and also moldings produced from this powder by a selective laser sintering process, are also described.Type: ApplicationFiled: October 26, 2010Publication date: August 16, 2012Applicant: BASF SEInventors: Claus Dallner, Steffen Funkhauser, Frank Müller, Jürgen Demeter, Mark Völkel
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Publication number: 20110313086Abstract: Thermoplastic molding materials comprising A) 10 to 99.99% by weight of a polyoxymethylene homo- or copolymer, B) 0.01 to 5% by weight of an imidazole of the general formula where the R1 to R4 radicals are each independently defined as follows: R1 is an alkyl radical having 1 to 5 carbon atoms, R2 to R4 are each hydrogen, an alkyl radical having 1 to 5 carbon atoms, C) 0 to 5% by weight of an alkaline earth metal oxide, D) 0 to 80% by weight of further additives, where the sum of the percentages by weight of components A) to D) adds up to 100%.Type: ApplicationFiled: February 8, 2010Publication date: December 22, 2011Applicant: BASF SEInventors: Karthikeyan Sharavanan, Jürgen Demeter
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Patent number: 8029912Abstract: The present invention relates to coated polyoxymethylene moldings comprising at least one polyoxymethylene homo- or copolymer A), and also, if appropriate, further additives B), which has been coated on the surface with at least one binder C) and one formaldehyde scavenger D), wherein the binder C) used comprises a polyalkylene oxide C1 or a polyvinyl ester C2 or a graft polymer C3 composed of C1 and C2 or a mixture of these, and the formaldehyde scavenger D) used comprises at least one imidazolidin-2-one compound.Type: GrantFiled: February 5, 2009Date of Patent: October 4, 2011Assignee: BASF SEInventors: Karthikeyan Sharavanan, Jens Assmann, Lidcay Herrera Taboada, Rainer Anderlik, Lothar Weller, Michael Prinz, Jürgen Demeter
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Publication number: 20100324184Abstract: The present invention relates to coated polyoxymethylene moldings comprising at least one polyoxymethylene homo- or copolymer A), and also, if appropriate, further additives B), which has been coated on the surface with at least one binder C) and one formaldehyde scavenger D), wherein the binder C) used comprises a polyalkylene oxide C1 or a polyvinyl ester C2 or a graft polymer C3 composed of C1 and C2 or a mixture of these, and the formaldehyde scavenger D) used comprises at least one imidazolidin-2-one compound.Type: ApplicationFiled: February 5, 2009Publication date: December 23, 2010Applicant: BASF SEInventors: Karthikeyan Sharavanan, Jens Assmann, Lidcay Herrera Taboada, Rainer Anderlik, Lothar Weller, Michael Prinz, Jürgen Demeter
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Patent number: 7776996Abstract: A continuous process for producing polyamides, their oligomers or mixtures thereof, if appropriate with further reaction products, comprises reaction of aminonitriles or dinitriles and diamines or mixtures thereof, if appropriate together with further polyamide-forming monomers and/or oligomers, with an aqueous medium composed of aqueous monomer and oligomer extracts obtained from polyamide production by extraction of the polymer with water in a reactor which has a vertical longitudinal axis and through which there is a flow substantially in the longitudinal direction wherein water and/or the aqueous medium are introduced into the reactor at two or more different locations along the vertical longitudinal axis, wherein the aqueous medium is introduced at one or more locations.Type: GrantFiled: February 8, 2005Date of Patent: August 17, 2010Assignee: BASF AktiengesellschaftInventors: Jürgen Deininger, Jürgen Demeter, Thilo Hahn, Gad Kory, Oliver Sötje, Peter Zehner
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Patent number: 7666976Abstract: Polyamide, whose main chain contains a chemically bound amine selected from the group consisting of 2-methyl-1,5-diaminopentane and 1-amino-2-R-cyclopent-1-ene, where R is a functional group capable of combining with an amino group to form an amide group, and processes for preparing such a polyamide and fibers, films and moldings comprising such a polyamide.Type: GrantFiled: May 6, 2004Date of Patent: February 23, 2010Assignee: BASF AktiengesellschaftInventors: Helmut Winterling, Jürgen Demeter, Jürgen Deininger, Gad Kory, Oliver Sötje, Axel Wilms, Robert Weiβ, Kurt Krempel, Christoph Benisch
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Patent number: 7393913Abstract: Polyamide whose main chain contains a chemically bound N-alkyllactam, and processes for preparing such a polyamide and fibers, films and moldings comprising such a polyamide.Type: GrantFiled: May 6, 2004Date of Patent: July 1, 2008Assignee: BASF AktiengesellschaftInventors: Helmut Winterling, Jürgen Demeter, Jürgen Deininger, Gad Kory, Oliver Sötje, Ralf Neuhaus, Kurt Krempel, Christoph Benisch
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Patent number: 7288612Abstract: The invention relates to an initiator composition for anionic polymerization, comprising at least one alkali metal hydride selected from LiH, NaH, and KH, and at least one organylaluminum compound, and to a process for the anionic polymerization of styrene monomers or of diene monomers using the initiator composition.Type: GrantFiled: April 15, 2003Date of Patent: October 30, 2007Assignee: BASF AktiengesellschaftInventors: Philippe Desbois, Christian Schade, Alain Deffieux, Stephane Menoret, Jürgen Demeter
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Publication number: 20060235191Abstract: Polyamides, oligomers thereof or mixtures thereof, if required with further reaction products, are prepared by reacting aminonitriles or dinitriles and diamines or a mixture containing aminonitrile, dinitrile and diamine, and, if required, further polyamide-forming monomers and/oligomers with water in a reactor (1) having a vertically oriented longitudinal axis, by a process in which, in the reactor (1), the reaction product is removed from the bottom and ammonia formed and any further low molecular weight compounds formed and water are taken off via the top (2), wherein the reactor (1) has at least two chambers (4) arranged one on top of the other in the longitudinal direction, the chambers (4) being separated from one another by liquid-tight trays (5), each chamber (4) being connected by a liquid overflow (6) to the chamber (4) directly underneath and a liquid product stream being taken off by the liquid overflow (6) of the lowermost chamber (4), the gas space (7) above the liquid level in each chambeType: ApplicationFiled: March 19, 2004Publication date: October 19, 2006Applicant: BASF AktiengesellschaftInventors: Jürgen Deininger, Jürgen Demeter, Gad Kory, Oliver Sötje, Helmut Winterling, Peter Zehner, Michael Heeger, Martin Gann, Axel Polt, Ulrich Treuling, Werner Weinle
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Publication number: 20060217522Abstract: An apparatus for making polyamides oligomers thereof mixtures thereof, the apparatus comprising a material selected from the group consisting of a) an austenitic steel comprising from 15 to 25% by weight of chromium, from 3 to 35% by weight of nickel and from 0 to 10% by weight of molybdenum, and iron, b) a duplex steel comprising from 20 to 30% by weight of chromium, from 3 to 10% by weight of nickel and from 0 to 5% by weight of molybdenum, and iron, and c) a nickel-based alloy comprising from 12 to 25% by weight of chromium and from 12 to 20% by weight of molybdenum, and nickelType: ApplicationFiled: July 15, 2004Publication date: September 28, 2006Applicant: BASF Aktiengesellscaft Patents, Trademarks and LicensesInventors: Jürgen Demeter, Oliver Sötje, Hans-Jürgen Bassler, Jürgen Deininger, Karl-Heinrich Klappert, Helmut Winterling
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Patent number: 6951901Abstract: A process for preparing impact-resistant molding compositions by anionic polymerization of vinylaromatic monomers in the presence of a rubber, in a continuous-flow reactor cascade composed of at least two reactors, where the vinylaromatic monomers are fed in substreams to the reactors of the reactor cascade, and an anionic initiator and a rubber are fed at least to the first reactor, and where the reactor cascade is composed of back-mixing reactors.Type: GrantFiled: October 18, 2002Date of Patent: October 4, 2005Assignee: BASF AktiengesellschaftInventors: Hermann Gausepohl, Jürgen Demeter, Philippe Desbois, Christian Schade
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Patent number: 6518379Abstract: In a process for polymerizing dienes in a solvent comprising vinylaromatic monomers, the polymerization is carried out in the presence of a metal compound of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo or W as catalyst and a Lewis acid as cocatalyst and, if desired, an alkylating agent and, if desired, a regulator. This process can be used for preparing high-impact polystyrene, acrylonitrile-butadiene-styrene copolymers or methyl methacrylate-butadiene-styrene copolymers.Type: GrantFiled: November 14, 2001Date of Patent: February 11, 2003Assignee: BASF AktiengesellschaftInventors: Stephan Jüngling, Christian Schade, Hermann Gausepohl, Volker Warzelhan, Rainer Moors, Hansjörg Schäch, Joachim Queisser, Gerrit Luinstra, Jürgen Demeter