Patents Assigned to Rohm GmbH
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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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Publication number: 20220332674Abstract: A process for producing alkyl methacrylates, in particular methyl methacrylate (MMA), includes production of methacrolein (MAL) in a first reaction stage; direct oxidative esterification (DOE) of the methacrolein with an alcohol, preferably methanol, to afford an alkyl methacrylate in a second reaction stage; and workup of the alkyl methacrylate crude product from the second reaction stage. An optimized workup of the reactor output from the oxidative esterification of methacrolein involves minimizing the amount of employed water, the amount of employed acid, and/or the amount of aqueous waste streams, through an optimized recycling of the generated process water streams.Type: ApplicationFiled: September 15, 2020Publication date: October 20, 2022Applicant: Röhm GmbHInventors: Florian Zschunke, Belaid Ait Aissa, Andreas Rühling, Gerhard Kölbl, Steffen Krill, Daniel Helmut König
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Publication number: 20220332935Abstract: Formed articles, such as medical devices, can be made of an acrylic-based polymer material, which contains at least one polyalkyl(meth)acrylate. A method can be used for the UV disinfection and/or sterilization of the formed articles, including disinfection and/or sterilization of the inner surface of the formed article. The method for UV sterilization involves exposure of the outer surface of the formed article with UV radiation at a wavelength in the range of 260 nm to 300 nm, wherein the acrylic-based polymer material has a transmittance of at least 10%, averaged over the wavelength range from 260 nm to 300 nm, measured in accordance with ISO 13468-2 at a thickness of 3 mm.Type: ApplicationFiled: April 12, 2022Publication date: October 20, 2022Applicants: Röhm GmbH, Roehm America LLCInventors: Kay Bernhard, Kierra Wright, Ralf Richter
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Patent number: 11472762Abstract: A novel process can be used for producing methacrylates such as methacrylic acid and/or alkyl methacrylates, in particular MMA. The process leads to an increased yield and increased efficiency compared to other C4-based production processes, in particular processes starting from isobutylene or tert-butanol as raw material. The process can be operated for longer periods without disruption and with the same or even increased activities and selectivities. The process can also be executed in a manner that is as simple, cost-effective, and environmentally friendly as possible.Type: GrantFiled: June 10, 2020Date of Patent: October 18, 2022Assignee: Röhm GmbHInventors: Steffen Krill, Andreas Rühling, Florian Zschunke
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Publication number: 20220298094Abstract: A process and a preparation plant prepares methacrolein from formaldehyde and propionaldehyde, in presence of water and a homogeneous catalyst based at least on an acid and a base. A reaction mixture is introduced into a methacrolein workup plant and separated in a first distillation column, into a first distillation mixture in a gas phase at the top and a second distillation mixture in a liquid phase at the bottom. The first distillation mixture is condensed and, in a first phase separator, the organic phase and the aqueous phase of the condensate are separated from one another. The aqueous phase is introduced into a second distillation column, that is not part of the methacrolein workup plant, and is separated into a third distillation mixture in a gas phase at the top and a fourth distillation mixture at the bottom. The third distillation mixture is introduced into the methacrolein workup plant.Type: ApplicationFiled: August 20, 2020Publication date: September 22, 2022Applicant: Röhm GmbHInventors: Rudolf Burghardt, Steffen Krill, Florian Zschunke, Eduard Rundal, Torsten Panak, Daniel Helmut König
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Publication number: 20220289656Abstract: A process and a preparation plant can prepare methacrolein from formaldehyde and propionaldehyde in the presence of a homogeneous catalyst mixture based at least on an acid and a base. For a good workup of the reaction mixture leaving the reactor, with a good energy balance and where the process has simplified apparatus implementation, the liquid reaction mixture under pressure is expanded in an expansion vessel and separated into a first expansion mixture in a gas phase and a second expansion mixture in a liquid phase. The first expansion mixture is condensed in a first condenser and the second expansion mixture is introduced into a first distillation column and separated therein, into a first distillation mixture in a gas phase at the top and a second distillation mixture in a liquid phase at the bottom. The first distillation mixture is condensed in the first condenser.Type: ApplicationFiled: August 20, 2020Publication date: September 15, 2022Applicant: Röhm GmbHInventors: Rudolf Burghardt, Steffen Krill, Florian Zschunke, Eduard Rundal, Torsten Panak, Daniel Helmut König
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Publication number: 20220281801Abstract: The present invention describes storage-stable glycerol (meth)acrylate carboxylic esters and a method for preparing these esters.Type: ApplicationFiled: May 22, 2022Publication date: September 8, 2022Applicant: Evonik Röhm GmbHInventors: Patrik Hartmann, Marita Kaufmann, Steffen Krill, Thorben Schütz, Marcel Treskow, Andrea Wittkowski
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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: 20220204436Abstract: A novel process can be used for producing methacrylates such as methacrylic acid and/or alkyl methacrylates, in particular MMA. The process leads to an increased yield and increased efficiency compared to other C4-based production processes, in particular processes starting from isobutylene or tert-butanol as raw material. The process can be operated for longer periods without disruption and with the same or even increased activities and selectivities. The process can also be executed in a manner that is as simple, cost-effective, and environmentally friendly as possible.Type: ApplicationFiled: June 10, 2020Publication date: June 30, 2022Applicant: Röhm GmbHInventors: Steffen Krill, Andreas Rühling, Florian Zschunke
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Patent number: 11319433Abstract: Light scattering polymeric compositions have improved scattering efficiency and improved mechanical properties. The compositions include a polymeric matrix material and at least two different kinds of scattering particles uniformly dispersed therein.Type: GrantFiled: January 31, 2019Date of Patent: May 3, 2022Assignees: Röhm GmbH, Roehm America LLCInventors: René Kogler, Michael Pasierb, Christopher Spain, Ursula Golchert, Ralf Richter, Ernst Becker, Stefan Nau
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Patent number: 11299449Abstract: A process for preparing methyl methacrylate by direct oxidative esterification of methacrolein has elevated yields compared to known processes. Methyl methacrylate (MMA) is used in large amounts for preparing polymers and copolymers with other polymerizable compounds. In addition, methyl methacrylate is an important synthesis unit for a variety of specialty esters based on methacrylic acid (MAA), which can be produced by transesterification with the appropriate alcohol. There is consequently a great interest in very simple, economic, and environmentally friendly processes for preparing methyl methacrylate. A superior workup of the reactor output from the oxidative esterification of methacrolein allows specific by-products to be isolated and then additionally converted to alkyl methacrylates, especially to MMA.Type: GrantFiled: June 7, 2019Date of Patent: April 12, 2022Assignee: Röhm GmbHInventors: Steffen Krill, Florian Zschunke, Belaid Ait Aissa, Marcel Treskow
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Patent number: 11285708Abstract: Heat resistant brittle films can be made from impact-modified poly(meth)acrylimide, and forgery prevention labels can contain the heat resistant brittle films. The films can be advantageously prepared by extrusion and, depending on the desired purpose, can be designed to be transparent, translucent, or entirely non-transparent, e.g., white. Ideally, the brittle films and the forgery prevention labels containing the brittle films have no intended break points such as slits, perforation, etc.Type: GrantFiled: February 7, 2020Date of Patent: March 29, 2022Assignees: Röhm GmbH, Roehm America LLCInventors: Ghirmay Seyoum, Markus Parusel, Kim Struwe, Anderson Costa, Claude Guénanten, Helmut Häring
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Publication number: 20220040963Abstract: Heat resistant brittle films can be made from impact-modified poly(meth)acrylimide, and forgery prevention labels can contain the heat resistant brittle films. The films can be advantageously prepared by extrusion and, depending on the desired purpose, can be designed to be transparent, translucent, or entirely non-transparent, e.g., white. Ideally, the brittle films and the forgery prevention labels containing the brittle films have no intended break points such as slits, perforation, etc.Type: ApplicationFiled: February 7, 2020Publication date: February 10, 2022Applicants: Röhm GmbH, Roehm America LLCInventors: Ghirmay Seyoum, Markus Parusel, Kim Struwe, Anderson Costa, Claude Guénanten, Helmut Häring
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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: 20220024102Abstract: A transparent weathering resistant foil for protection of various substrates against solar radiation contains at least two layers A and B, wherein the spectral transmittance of the layer A at any wavelength ?A is not more than 10%; wherein 270 nm??A?360 nm; and the spectral transmittance of the layer B at any wavelength ?B is not more than 10%; wherein 270 nm??B?370 nm. The foil can also contain at least two layers A and B; wherein the spectral transmittance of the layer A at any wavelength ?A is not more than 20%; wherein 270 nm??A?310 nm; and the spectral transmittance of the layer B at any wavelength ?B is not more than 10%; wherein 270 nm??B?370 nm.Type: ApplicationFiled: November 13, 2019Publication date: January 27, 2022Applicant: Röhm GmbHInventors: Claude Guénanten, Ghirmay Seyoum, Michael Enders, Herbert Groothues, Kim Struwe
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Publication number: 20210371651Abstract: A mixture contains at least one amino-regulated polyether block amide (PEBA) and at least one poly(meth)acrylate selected from poly(meth)acrylimides, polyalkyl(meth)acrylates, and mixtures thereof. The mass ratio of PEBA to poly(meth)acrylate is 95:5 to 60:40. The polyalkyl(meth)acrylate contains 80% by weight to 99% by weight of methyl methacrylate (MMA) units and 1% by weight to 20% by weight of C1-C10-alkyl acrylate units, based on the total weight of polyalkyl(meth)acrylate. The mixture can be processed to give foamed mouldings. The mouldings can be used in footwear soles, stud material, insulation or insulating material, damping components, lightweight components, or in a sandwich structure.Type: ApplicationFiled: October 11, 2019Publication date: December 2, 2021Applicants: Evonik Operations GmbH, Röhm GmbHInventors: Kathrin Salwiczek, Alexander Richter, Christine Weiß, Wolfgang Luley, Andreas Weber, Lukas Friedrich Dössel, David Bailey, Ralf Richter, Steffen Krill, Johannes Vorholz, Maren Kuhn
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Publication number: 20210363089Abstract: Methacrolein is prepared in a continuous process by a Mannich condensation reaction of formaldehyde with propanal. A methacrolein polymerization inhibitor is introduced during the production process and a part thereof is recycled back into the reactor where the Mannich condensation reaction is carried out.Type: ApplicationFiled: August 1, 2019Publication date: November 25, 2021Applicant: Röhm GmbHInventors: Alexander Lygin, Steffen Krill, Matthias Grömping, Torsten Balduf, Rudolf Burghardt
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Publication number: 20210317064Abstract: Methacrylic acid or alkyl methacrylate are produced starting from acrolein, which is available from glycerol or propane.Type: ApplicationFiled: July 11, 2019Publication date: October 14, 2021Applicant: Röhm GmbHInventors: Alexander May, Steffen Krill, Marcel Treskow, Diego Carambia, Gabriel Avella
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Publication number: 20210269385Abstract: A process for preparing methyl methacrylate by direct oxidative esterification of methacrolein has elevated yields compared to known processes. Methyl methacrylate (MMA) is used in large amounts for preparing polymers and copolymers with other polymerizable compounds. In addition, methyl methacrylate is an important synthesis unit for a variety of specialty esters based on methacrylic acid (MAA), which can be produced by transesterification with the appropriate alcohol. There is consequently a great interest in very simple, economic, and environmentally friendly processes for preparing methyl methacrylate. A superior workup of the reactor output from the oxidative esterification of methacrolein allows specific by-products to be isolated and then additionally converted to alkyl methacrylates, especially to MMA.Type: ApplicationFiled: June 7, 2019Publication date: September 2, 2021Applicant: Röhm GmbHInventors: Steffen Krill, Florian Zschunke, Belaid Ait Aissa, Marcel Treskow
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Publication number: 20210102058Abstract: Light scattering polymeric compositions have improved scattering efficiency and improved mechanical properties. The compositions include a polymeric matrix material and at least two different kinds of scattering particles uniformly dispersed therein.Type: ApplicationFiled: January 31, 2019Publication date: April 8, 2021Applicants: Röhm GmbH, Roehm America LLCInventors: René Kogler, Michael Pasierb, Christopher Spain, Ursula Golchert, Ralf Richter, Ernst Becker, Stefan Nau