Patents by Inventor Rüdiger Carloff
Rüdiger Carloff 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: 20240043591Abstract: A process can be used for manufacturing an acrylic copolymer having increased heat resistance, high transparency, and improved adhesion to metal surfaces. The process involves polymerizing a monomer mixture, optional heating of the copolymer mixture, and removing volatile components from the copolymer mixture by degassing. Moulding compositions containing this copolymer are highly suitable for manufacturing optical elements for optoelectronic devices containing acrylic and metallic or ceramic parts.Type: ApplicationFiled: December 8, 2021Publication date: February 8, 2024Applicant: Röhm GmbHInventors: Rüdiger Carloff, Werner Arnold, Gerald Dietrich
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Patent number: 11807699Abstract: A transparent acrylic-based polymer composition has an increased resistance to alcohols, oils and fats. The polymer composition contains: (A) a copolymer of alkyl(meth)acrylates, aromatic vinyl monomer and unsaturated carboxylic acid anhydride; (B) a copolymer containing aromatic vinyl monomer and a vinyl cyanide monomer; and (C) a particulate core-shell type graft copolymer containing a butadiene-based core as a rubbery phase and a copolymer containing alkyl(meth)acrylates and, optionally, aromatic vinyl monomer as a hard phase. The components A and B form a polymer matrix and the particulate core-shell type graft copolymer C is dispersed in said polymer matrix.Type: GrantFiled: December 11, 2019Date of Patent: November 7, 2023Assignee: Röhm GmbHInventor: Rüdiger Carloff
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Patent number: 11780944Abstract: A process can be used for producing optical molding materials on the basis of methyl methacrylate (MMA). The MMA produced by an optimized method and the molding materials feature in particular a very low yellowness index. This MMA has been produced by direct oxidative esterification of methacrolein. An optimized workup of the reactor output from the oxidative esterification of methacrolein can be used for removing particularly discoloring byproducts. This process moreover has the advantage that fewer demands are placed on plant apparatus configuration.Type: GrantFiled: July 22, 2022Date of Patent: October 10, 2023Assignee: Röhm GmbHInventors: Steffen Krill, Belaid Ait Aissa, Florian Zschunke, Gerhard Kölbl, Rüdiger Carloff
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Publication number: 20230303740Abstract: A copolymer has increased heat resistance, high transparency, and low haze values. Moulding compositions can contain this copolymer and a process can be used for the manufacturing this copolymer. The moulding compositions are highly suitable for the manufacturing of optical elements used in various optical devices including primary optics, secondary optics, tertiary optics, as well as light guides.Type: ApplicationFiled: June 23, 2021Publication date: September 28, 2023Applicant: Röhm GmbHInventor: Rüdiger CARLOFF
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Publication number: 20220356282Abstract: A process can be used for producing optical molding materials on the basis of methyl methacrylate (MMA). The MMA produced by an optimized method and the molding materials feature in particular a very low yellowness index. This MMA has been produced by direct oxidative esterification of methacrolein. An optimized workup of the reactor output from the oxidative esterification of methacrolein can be used for removing particularly discoloring byproducts. This process moreover has the advantage that fewer demands are placed on plant apparatus configuration.Type: ApplicationFiled: July 22, 2022Publication date: November 10, 2022Applicant: Röhm GmbHInventors: Steffen KRILL, Belaid Ait Aissa, Florian Zschunke, Gerhard Kõlbl, Rüdiger Carloff
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Patent number: 11427664Abstract: A process is useful for producing optical molding materials on the basis of methyl methacrylate (MMA), wherein this MMA has been produced by an optimized method and the molding materials feature in particular a very low yellowness index. This MMA has been produced by direct oxidative esterification of methacrolein. In particular, an optimized workup of the reactor output from the oxidative esterification of methacrolein is useful for removing particularly discoloring byproducts. This process moreover has the advantage that fewer demands than described in related art are placed on plant apparatus configuration.Type: GrantFiled: August 20, 2018Date of Patent: August 30, 2022Assignee: Röhm GmbHInventors: Steffen Krill, Belaid Ait Aissa, Florian Zschunke, Gerhard Kölbl, Rüdiger Carloff
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Publication number: 20220033551Abstract: A transparent acrylic-based polymer composition has an increased resistance to alcohols, oils and fats. The polymer composition contains: (A) a copolymer of alkyl(meth)acrylates, aromatic vinyl monomer and unsaturated carboxylic acid anhydride; (B) a copolymer containing aromatic vinyl monomer and a vinyl cyanide monomer; and (C) a particulate core-shell type graft copolymer containing a butadiene-based core as a rubbery phase and a copolymer containing alkyl(meth)acrylates and, optionally, aromatic vinyl monomer as a hard phase. The components A and B form a polymer matrix and the particulate core-shell type graft copolymer C is dispersed in said polymer matrix.Type: ApplicationFiled: December 11, 2019Publication date: February 3, 2022Applicant: Röhm GmbHInventor: Rüdiger Carloff
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Publication number: 20210095095Abstract: A light emitting element includes edge-lit luminaires of transparent light guiding material having an increased resistance against UV-light and high temperatures. The light emitting element can be advantageously employed as a light source in outdoor applications such as traffic signs, street lights, advertising panels, outdoor illumination means or in exterior vehicle lighting.Type: ApplicationFiled: January 22, 2019Publication date: April 1, 2021Applicants: Röhm GmbH, Roehm America LLCInventors: René Kogler, Rüdiger Carloff, Christopher Walby
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Publication number: 20210032386Abstract: A process is useful for producing optical molding materials on the basis of methyl methacrylate (MMA), wherein this MMA has been produced by an optimized method and the molding materials feature in particular a very low yellowness index. This MMA has been produced by direct oxidative esterification of methacrolein. In particular, an optimized workup of the reactor output from the oxidative esterification of methacrolein is useful for removing particularly discoloring byproducts. This process moreover has the advantage that fewer demands than described in related art are placed on plant apparatus configuration.Type: ApplicationFiled: August 20, 2018Publication date: February 4, 2021Applicant: Röhm GmbHInventors: Steffen Krill, Belaid Ait Aissa, Florian Zschunke, Gerhard Kölbl, Rüdiger Carloff
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Publication number: 20160122525Abstract: The present invention relates to a composite system, preferably a multilayer film, having high impact resistance and heat distortion resistance, and to a process for production thereof and to the use thereof.Type: ApplicationFiled: May 24, 2013Publication date: May 5, 2016Applicant: Evonik Roehm GmbHInventors: Rüdiger CARLOFF, Gerald DIETRICH, Michael WICKER, Chih-Lung CHEN
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Patent number: 8669338Abstract: The invention relates to novel poly(meth)acrylates for producing moulding compositions. In particular, the invention relates to novel methacrylates having ester groups which, in the cleavage process, liberate at most only a very small amount of components which are not re-copolymerizable. Copolymerization of monomers of this type in the production of the novel poly(meth)acrylates for moulding compositions brings about only minimal alteration of the heat resistance of these materials or may indeed improve the same.Type: GrantFiled: September 7, 2010Date of Patent: March 11, 2014Assignee: Evonik Roehm GmbHInventors: Ruediger Carloff, Roger Recktenwald
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Patent number: 8585275Abstract: The invention relates to a vented extruder (1) for the devolatilization of a polymer material, encompassing at least one extruder barrel (2) with at least one rotatably driven extruder screw (3) mounted in the extruder barrel (2), and with at least one material feed and with at least one extrudate outlet, and also with at least one vent zone (9). A particular feature of the vented extruder (1) is that the gas output for the gas arising in the vent zone (9) has been provided upstream of the material feed, in relation to the direction of conveying of the polymer material.Type: GrantFiled: August 12, 2008Date of Patent: November 19, 2013Assignee: Evonik Roehm GmbHInventors: Ruediger Carloff, Joachim Heid, Heinz Vetter
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Patent number: 8534903Abstract: The invention relates to a vented extruder (1) for the devolatilization of a polymer material. The vented extruder (1) encompasses at least one drive (4), at least one gearbox (5), at least one rotatably driven extruder screw (3), at least one first material feed (6) and at least one extrudate outlet (13). A feature of the vented extruder (1) according to the invention is that the drive, encompassing drive (4) and gearbox (5), has been provided in the region of that end of the extruder screw (3) that is downstream in relation to the direction of conveying of the polymer.Type: GrantFiled: August 12, 2008Date of Patent: September 17, 2013Assignee: Evonik Röhm GmbHInventors: Ruediger Carloff, Joachim Heid, Heinz Vetter
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Publication number: 20130096237Abstract: The invention relates to novel composite materials with improved mechanical properties and improved weathering resistance, said composite materials being made of at least one material containing cellulose, preferably wood, and at least one plastic, and to a method for producing said composite materials and for using same.Type: ApplicationFiled: June 1, 2011Publication date: April 18, 2013Applicant: Evonik Roehm GmbHInventors: Carlo Schuetz, Christian Roth, Ruediger Carloff, Klaus Schultes, Victor Khrenov, Eric Reinheimer
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Publication number: 20130079439Abstract: The invention relates to novel composite materials which are made of at least one material containing cellulose, preferably wood, and at least one plastic material, and which have improved mechanical and weather resistance properties.Type: ApplicationFiled: June 1, 2011Publication date: March 28, 2013Applicant: Evonik Roehm GmbHInventors: Carlo Schuetz, Christian Roth, Ruediger Carloff, Klaus Schultes, Victor Khrenov, Eric Reinheimer
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Publication number: 20120232222Abstract: The invention provides a process for preparing 1-alkoxy-2-methyl-1-oxopropan-2-yl(meth)acrylate, e.g. 1-methoxy-2-methyl-1-oxopropan-2-yl(meth)acrylate, by transesterifying alkyl ?-hydroxyisobutyrates. Copolymerization of such monomers in the preparation of poly(meth)acrylate-based moulding materials improves the heat distortion resistance thereof.Type: ApplicationFiled: September 7, 2010Publication date: September 13, 2012Applicant: Evonik Roehm GmbHInventors: Thorben Schütz, Joachim Knebel, Guenther Graeff, Ruediger Carloff, Roger Recktenwald, Volker Herzog
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Publication number: 20120172563Abstract: The invention relates to novel poly(meth)acrylates for producing moulding compositions. In particular, the invention relates to novel methacrylates having ester groups which, in the cleavage process, liberate at most only a very small amount of components which are not re-copolymerizable. Copolymerization of monomers of this type in the production of the novel poly(meth)acrylates for moulding compositions brings about only minimal alteration of the heat resistance of these materials or may indeed improve the same.Type: ApplicationFiled: September 7, 2010Publication date: July 5, 2012Applicant: Evonik Roehm GmbHInventors: Ruediger Carloff, Roger Recktenwald
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Patent number: 8148480Abstract: The invention relates to a stirred-tank reactor and to a method for carrying out a polymerization reaction of unsaturated monomers using a stirred-tank reactor. According to the invention, said stirred-tank reactor is characterized in that the product discharge point is designed as the central base outlet that is at least partially traversed by the agitator shaft. Said polymerization is performed continuously under positive pressure, so that the stirred-tank reactor is operated hydrodynamically.Type: GrantFiled: November 28, 2008Date of Patent: April 3, 2012Assignee: Evonik Roehm GmbHInventors: Ruediger Carloff, Joachim Heid, Olaf Pickenaecker
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Publication number: 20110263806Abstract: The invention relates to a copolymer for producing molded compounds or cast glass for the production of molded bodies having increased dimensional stability under heat, obtainable from the copolymerization of A) one or more ethylenically unsaturated ester compounds of the formula (I), where R1 is hydrogen or methyl and R2 a linear or branched alkyl group with 1 to 8 carbon atoms, B) one or more ethylenically unsaturated ester compounds of the formula (II), where R3 is hydrogen or methyl and R4 a cyclic group with 8 to 30 carbon atoms, C) one or more ethylenically unsaturated ester compounds of the formula (III), where R5 is hydrogen or methyl and R6 and R7, independently of each other, are hydrogen or a linear or branched group with 1 to 40 carbon atoms.Type: ApplicationFiled: October 15, 2009Publication date: October 27, 2011Applicant: Evonik Roehm GmbHInventors: Gerald Dietrich, Ruediger Carloff, Wilhelm Karnbrock, Joachim Knebel, Zhong Shen, Chiew-Chiang Haw
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Publication number: 20110188336Abstract: The invention relates to a vented extruder (1) for the devolatilization of a polymer material. The vented extruder (1) encompasses at least one drive (4), at least one gearbox (5), at least one rotatably driven extruder screw (3), at least one first material feed (6) and at least one extrudate outlet (13). A feature of the vented extruder (1) according to the invention is that the drive, encompassing drive (4) and gearbox (5), has been provided in the region of that end of the extruder screw (3) that is downstream in relation to the direction of conveying of the polymer.Type: ApplicationFiled: August 12, 2008Publication date: August 4, 2011Applicant: Evonik Roehm GmbHInventors: Ruediger Carloff, Joachim Heid, Heinz Vetter