Patents by Inventor Michael Bödiger
Michael Bödiger 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: 6919487Abstract: The present application relates to a process for producing high-purity bis(4-hydroxyaryl)alkanes from adducts of bis(4-hydroxyaryl)alkanes and aromatic hydroxy compounds, which are obtained by acid-catalysed reaction of the aromatic hydroxy compounds with ketones.Type: GrantFiled: December 7, 2000Date of Patent: July 19, 2005Assignee: Bayer AktiengesellschaftInventors: Rainer Neumann, Rolf Lanze, Frieder Heydenreich, Michael Bödiger, Michael Prein
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Patent number: 6906227Abstract: The application relates to a process for producing high-purity bis(4-hydroxyaryl)alkanes from adducts of bis(4-hydroxyaryl)alkanes and aromatic hydroxy compounds, which are obtained by acid-catalysed reaction of the aromatic hydroxy compounds with ketones.Type: GrantFiled: December 7, 2000Date of Patent: June 14, 2005Assignee: Bayer AktiengesellschaftInventors: Rainer Neumann, Rolf Lanze, Frieder Heydenreich, Michael Bödiger, Michael Prein
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Patent number: 6855794Abstract: Polycarbonate substrates, the preparation of which is based on 1,1-bis-(4-hydroxyphenyl) -3,3,5-trimethylcyclohexane, and their use for producing shaped articles with particularly high purity and extremely high surface brilliance and also the shaped articles which can be produced from the polycarbonate substrate are described.Type: GrantFiled: February 23, 2004Date of Patent: February 15, 2005Assignees: Bayer Aktiengesellschaft, Bayer Antwerpen N.V.Inventors: Michael Bödiger, Steffen Kühling, Franky Bruynseels, Dirk van Meirvenne, René de Cleyn
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Patent number: 6835798Abstract: A process for the preparation of polycarbonate by the phase boundary process is disclosed. The process entails reacting at least one dihydroxydiarylalkane in the form of its alkali metal salts with phosgene in the heterogeneous phase in the presence of sodium hydroxide solution and an organic solvent. The process is characterized in that the feedstock have but low content of Fe, Cr, Ni, Zn, Ca, Mg, Al metals or homologues thereof, and in that the organic solvent is separated off, and in that the polycarbonate which is obtained is worked up. The resulting polycarbonate is particularly useful in producing transparent shaped articles.Type: GrantFiled: August 5, 2002Date of Patent: December 28, 2004Assignees: Bayer Aktiengesellschaft, Bayer Antwerpen N.V.Inventors: Michael Bödiger, Steffen Kühling, Franky Bruynseels, Dirk van Meirvenne, René de Cleyn
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Patent number: 6828465Abstract: The present invention provides crystals of an adduct of a bisphenol and a phenol and methods of producing those crystals. The crystals may find use in preparing bisphenols.Type: GrantFiled: December 16, 2002Date of Patent: December 7, 2004Assignee: Bayer AktiengesellschaftInventors: Rainer Neumann, Rolf Lanze, Frieder Heydenreich, Michael Bödiger, Michael Prein
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Patent number: 6815524Abstract: Polycarbonate substrates having low concentration of defects are disclosed. The substrates are suitable for producing molded articles characterized by low cloudiness.Type: GrantFiled: August 5, 2002Date of Patent: November 9, 2004Assignees: Bayer Aktiengesellschaft, Bayer Antwerpen N.V.Inventors: Michael Bödiger, Steffen Kühling, Franky Bruynseels, Dirk van Meirvenne, Renë de Cleyn
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Patent number: 6774268Abstract: The present invention provides mixtures containing bisphenol A, methods for the production thereof. The mixtures of the present invention may find use in the production of polymeric materials.Type: GrantFiled: September 26, 2002Date of Patent: August 10, 2004Assignee: Bayer AktiengesellschaftInventors: Michael Bödiger, Rainer Neumann, Frieder Heydenreich, Michael Prein
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Patent number: 6723881Abstract: Monodisperse cation-exchangers and anon-exchangers are conditioned by a process and thereafter used as catalysts and for the production of bisphenols.Type: GrantFiled: August 28, 2002Date of Patent: April 20, 2004Assignee: Bayer AktiengesellschaftInventors: Michael Bödiger, Rainer Neumann, Frieder Heydenreich, Michael Prein, Gerhard Fennhoff, Ulrich Schnegg, Rudolf Wagner, Wolfgang Wambach, Reinhold Klipper
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Patent number: 6723885Abstract: A process for the production of 2,2-bis(4-hydroxyphenyl)propane (BPA) is disclosed. The process that entails reacting acetone with phenol in the presence of cross-linked sulfonated polystyrene resins is characterised in that BPA is separated from the reaction solution downstream of the reaction unit by means of a multi-stage vacuum distillation and a subsequent single- or multi-stage layer crystallisation. The by-product stream with accumulated by-products is returned downstream of the reaction unit.Type: GrantFiled: August 26, 2002Date of Patent: April 20, 2004Assignee: Bayer AktiengesellschaftInventors: Frieder Heydenreich, Michael Prein, Michael Bödiger, Rainer Neumann, Gerhard Fennhoff, Johan Vaes
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Patent number: 6710211Abstract: 2,2-bis(4-hydroxyphenyl)propane (BPA) is produced by reacting acetone and phenol in the presence of cross-linked sulfonated polystyrene resins and then separating the BPA off from the reaction solution.Type: GrantFiled: August 26, 2002Date of Patent: March 23, 2004Assignee: Bayer AktiengesellschaftInventors: Frieder Heydenreich, Michael Prein, Michael Bödiger, Rainer Neumann
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Patent number: 6706788Abstract: Flame-resistant, thermoplastic moulding compositions containing A) 70 to 98 parts by weight of an aromatic polycarbonate, B) 0.5 to 20 parts by weight of a graft polymer, C) 0.5 to 5 parts by weight of a mixture of C.1) 10 to 90 parts by weight, based on C, of a monophosphorus compound of formula (I) C.2) 90 to 10 wt. %, based on C, of a phosphorus compound of formula (II) D) 0.05 to 5 parts by weight of a fluorinated polyolefin with an average particle diameter of 0.05 to 1000 &mgr;m, a density of 1.2 to 2.3 g/m3 and a fluorine content of 65 to 76 wt. %.Type: GrantFiled: November 17, 1999Date of Patent: March 16, 2004Assignee: Bayer AktiengesellschaftInventors: Thomas Eckel, Michael Bödiger, Dieter Wittmann, Heinrich Alberts, Klaus Horn
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Patent number: 6696542Abstract: Polycarbonate substrates, the preparation of which is based on 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexanone, and their use for producing shaped articles with particularly high purity and extremely high surface brilliance and also the shaped articles which can be produced from the polycarbonate substrate are described.Type: GrantFiled: August 5, 2002Date of Patent: February 24, 2004Assignees: Bayer Aktiengesellschaft, Bayer Antwerpen, N.V.Inventors: Michael Bödiger, Steffen Kühling, Franky Bruynseels, Dirk van Meirvenne, René de Cleyn
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Patent number: 6683223Abstract: A process for fluidizing bisphenol dust is disclosed. The process entails adding 0.1 to 10 parts by weight of water per 1 part by weight of bisphenol dust. Also disclosed is a process for preparing a bisphenol wherein the fluidized bisphenol dust according to the invention is introduced before, during or after reaction of a phenol with a carbonyl compound.Type: GrantFiled: October 15, 2002Date of Patent: January 27, 2004Assignee: Bayer AktiengesellschaftInventors: Michael Bödiger, Rainer Neumann, Nikolai Kostyszyn, Rolf Lanze, Frieder Heydenreich, Michael Prein
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Patent number: 6590128Abstract: A process for the commissioning of a process for the production of 2,2-bis(4-hydroxyphenyl)propane is disclosed. The process that entails reacting phenol with acetone in the presence of sulfonated cross-linked polystyrene resins is characterized in that the commissioning takes place with an acetone concentration reduced below, and a phenol concentration increased above, that of the optimal sustained operation state, with a reduced quantitative throughput, and in that with temperature control, the reactant quantity and the acetone content of the reactor feed are subsequently increased until the sustained operating state is reached.Type: GrantFiled: September 5, 2002Date of Patent: July 8, 2003Assignee: Bayer AktiengesellschaftInventors: Michael Bödiger, Rainer Neumann, Frieder Heydenreich, Michael Prein, Hans-Ludwig Fofonka
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Patent number: 6417318Abstract: The present invention relates to a method for avoiding undesirable discoloration in polycarbonate production by catalytic removal of dissolved oxygen from phenol by (a) admixing hydrogen with phenol and (b) passing the phenol stream over ion exchangers doped with platinum group metals.Type: GrantFiled: February 5, 2001Date of Patent: July 9, 2002Assignee: Bayer AktiengesellschaftInventors: Frieder Heydenreich, Rudolf Wagner, Michael Bödiger
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Patent number: 6320016Abstract: X-ray detectable molded articles prepared from polycarbonate resins are disclosed. The articles, preferably toys or medical equipment, are molded of polycarbonate the structure of which contains units derived from iodophenyl.Type: GrantFiled: December 9, 1999Date of Patent: November 20, 2001Assignee: Bayer AktiengesellschaftInventors: Michael Bödiger, Wolfgang Ebert, Heinrich Alberts, Dieter Wittmann, Thomas Eckel