Abstract: A novel reaction resin formulation having a significantly improved properties profile contains crosslinkers, monomers, urethane methacrylates, prepolymers, optional further auxiliaries, and a curing system containing permaleinates and a tertiary organic phosphite. The reaction resin formulation is useful for marking driving surfaces or coating surfaces. The reaction resins, above all based on a novel curing system, show an improved combination of higher long-term storage stability, improved toxicological profile, reduced curing time, a low yellowing tendency and a better colour fastness.
Abstract: A new method can be used for producing suitable improved carrier materials as a base material for catalysts for carrying out a direct oxidative esterification. In general, the catalyst is used to convert aldehydes with alcohols in the presence of oxygenic gases directly to the corresponding ester, for example, where (meth)acrolein can be converted to methyl(meth)acrylate. The catalysts used are characterized in particular by high mechanical and chemical stability as well as by good catalytic performance even over very long periods of time. This applies in particular to an improvement of catalyst service life, activity and selectivity in comparison to other catalysts.
Type:
Application
Filed:
July 1, 2021
Publication date:
August 17, 2023
Applicant:
Röhm GmbH
Inventors:
Steffen Krill, Andreas Rühling, Andreas Tepperis
Abstract: A novel process can be used for preparing methacrylates, such as methacrylic acid and/or alkyl methacrylates, especially MMA. The process allows for prolonging of the catalyst service life and an increase in efficiency of the methacrylate preparation based on C2 or C4 raw materials, especially when proceeding from isobutylene or tort-butanol or ethylene as raw material. The process allows for performance for longer periods without disruption, with constant or even increased activities and selectivities. This gives rise to the possibility of performing such processes in a very simple, economically viable, and environmentally benign manner. In addition, it has been possible to minimize known safety risks that emanate from the methacrolein intermediate.
Type:
Application
Filed:
July 1, 2021
Publication date:
July 20, 2023
Applicant:
Röhm GmbH
Inventors:
Steffen KRILL, Melanie Raczek, Rudolf Burghardt
Abstract: A thermoplastic moulding composition has improved weathering resistance. A process for producing the thermoplastic moulding composition involves providing a thermoplastic polymer and adding at least one colouring preparation. Injection moulded parts and extruded parts can be composed of the thermoplastic moulding composition.
Type:
Application
Filed:
June 9, 2021
Publication date:
July 6, 2023
Applicant:
Röhm GmbH
Inventors:
Ursula GOLCHERT, Stefan Nau, Ernst Becker
Abstract: A process can be used for manufacturing a coloured moulding composition with an improved optical appearance and a particularly high thermal stability. The process involves providing a thermoplastic polymer and adding a colouring preparation, or a liquid composition or a master batch containing the colouring preparation. Injection moulded parts and extruded parts can be composed of the coloured moulding composition.
Type:
Application
Filed:
June 9, 2021
Publication date:
June 29, 2023
Applicant:
Röhm GmbH
Inventors:
Ursula Golchert, Ralf Richter, Jörg Kraft, Gerald Dietrich, Ernst Becker, Stefan Nau
Abstract: 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:
Grant
Filed:
August 20, 2020
Date of Patent:
June 20, 2023
Assignee:
Röhm GmbH
Inventors:
Rudolf Burghardt, Steffen Krill, Florian Zschunke, Eduard Rundal, Torsten Panak, Daniel Helmut König
Abstract: Free radical-curing (meth)acrylate resins contain stabilizers and acidic adhesion promoters. The (meth)acrylate resins are characterized by particularly high storage stability, even at relatively high temperatures, and a concomitant increase in the activity of the accelerator present in the (meth)acrylate resin. The special stabilizers increase the storage stability, give rise to a rapid cure rate, and make the curing properties insensitive to the acidic adhesion promoters present alongside them. This makes it possible for very good adhesion to a wide variety of materials and thus a broader field of use.
Abstract: A novel reaction system can be used for intumescent coating. Intumescent coatings are used in particular for the protection of metallic building components, such as girders in building construction. In the event of a fire, such coatings undergo reactive foaming that results in the formation on the metal girder of a fireproof insulating layer having low thermal conductivity and, through the insulation that this creates, retards any early, thermal-induced failure of the building component. Resin systems having improved low-temperature flexibility can be used to ensure good metal adhesion and impact resistance even at low temperatures, while avoiding the polymer components that are otherwise customary in resin systems.
Abstract: A process can be used for producing hydroxyalkyl (meth)acrylate esters, in particular hydroxyethyl methacrylate (HEMA). The process involves a first reaction of (meth)acrolein with at least one polyhydric alcohol, in particular ethylene glycol, in the presence of a first catalyst C1, wherein a first reaction product containing a cyclic acetal is obtained. The process then involves a second reaction of the first reaction product with oxygen in the presence of a second catalyst C2, wherein a second reaction product containing at least one hydroxyalkyl (meth)acrylate ester is obtained. After the first reaction, water and optionally further components, in particular (meth)acrolein and/or the polyhydric alcohol, e.g. ethylene glycol, are at least partially removed from the first reaction product.
Type:
Application
Filed:
April 19, 2021
Publication date:
June 8, 2023
Applicant:
Röhm GmbH
Inventors:
Andreas RÜHLING, Steffen Krill, Florian Zschunke, Belaid Ait Aissa
Abstract: An improved process can be used for the production of methacrylates, in particular methacrylic acid and/or methyl methacrylate (MMA). Specific embodiments of this process can be used for the safe and efficient production of these products from C-4-based raw materials, in particular those based on isobutylene or tert-butanol as raw materials. With this novel process, it is possible to operate such processes for a longer period of time without any safety or cleaning related shutdowns. This makes it possible to carry out such processes as simple, economic, and environmentally friendly as possible.
Type:
Grant
Filed:
March 25, 2021
Date of Patent:
May 30, 2023
Assignee:
Röhm GmbH
Inventors:
Steffen Krill, Jalyn Deng, Markus Maier
Abstract: A process produces methyl methacrylate by direct oxidative esterification of methacrolein. Methyl methacrylate is used in large amounts for producing polymers and copolymers with other polymerizable compounds. An optimized workup of the reactor discharge from the oxidative esterification of methacrolein allows for co-discharged fine catalyst particles to be very efficiently separated and optionally removed or recycled. In addition, this process can reduce the formation of byproducts in extended continuous operation compared to known variant. A reactor system contains stirrer configurations which allow virtually abrasion-free operation and thus a catalyst on-stream time of several years.
Type:
Grant
Filed:
May 25, 2022
Date of Patent:
May 30, 2023
Assignee:
Röhm GmbH
Inventors:
Steffen Krill, Andreas Rühling, Belaid Ait Aissa
Abstract: A process can be used for preparing methyl methacrylate (MMA), by direct oxidative esterification of methacrolein. The MMA and polymers produced therefrom feature a very low yellowness index. A workup of the reactor output from the oxidative esterification of methacrolein allows for particularly discolouring by-products to be removed or degraded without significant MMA losses.
Abstract: An improved process can be used for the production of methacrylates, in particular methacrylic acid and/or methyl methacrylate (MMA). Specific embodiments of this process can be used for the safe and efficient production of these products from C-4-based raw materials, in particular those based on isobutylene or tort-butanol as raw materials. With this novel process, it is possible to operate such processes for a longer period of time without any safety or cleaning related shutdowns. This makes it possible to carry out such processes as simple, economic, and environmentally friendly as possible.
Type:
Application
Filed:
March 25, 2021
Publication date:
April 20, 2023
Applicant:
Röhm GmbH
Inventors:
Steffen KRILL, Jalyn Deng, Markus Maier
Abstract: An innovative reactive resin system can be used for intumescent coating. Intumescent coatings are used in particular for fire protection of metallic components, such as girders in structural engineering. In a fire scenario, these coatings are reactively foamed and so form a fire-resistant insulating layer with low thermal conductivity around the metal girder, with the resultant insulation retarding premature failure of this component. The resin systems are prepared by an innovative process where the monomer fraction is polymerized only up to a maximum degree of 70%. The glass transition temperature of this polymeric component of the resultant composition is particularly low.
Abstract: An acrylic multilayer foil includes a layer in which silica particles are uniformly distributed in an acrylic polymer matrix and at least one further layer. Due to adhesive promoting properties of the layer containing silica particles, the multilayer foil can be easily coated or laminated onto a substrate. The foil has a high weathering resistance and excellent mechanical properties. Therefore, the multilayer foil is highly suitable for surface-protection of materials such as polyvinyl chloride (PVC) and for use in high-pressure laminates (HPLs).
Type:
Application
Filed:
February 18, 2021
Publication date:
April 6, 2023
Applicant:
Roehm GmbH
Inventors:
Ghirmay SEYOUM, Michael ENDERS, Herbert GROOTHUES, Claude GUENANTEN, Kim STRUWE, Helmut HAERING, Girolamo MUSCI
Abstract: An acrylic multilayer foil includes a layer A in which silica particles are uniformly distributed in an acrylic polymer matrix and a coating layer D. Due to adhesive promoting properties of the layer A containing silica particles, the coating layer D can be advantageously applied onto the layer A. The foil has a high weathering resistance and excellent mechanical properties. Therefore, the foil is highly suitable for surface-protection of materials such as polyvinyl chloride (PVC) and for use in high-pressure laminates (HPLs).
Type:
Application
Filed:
February 18, 2021
Publication date:
March 30, 2023
Applicant:
Roehm GmbH
Inventors:
Ghirmay SEYOUM, Michael ENDERS, Herbert GROOTHUES, Claude GUENANTEN, Kim STRUWE, Helmut HAERING, Girolamo MUSCI
Abstract: 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:
Application
Filed:
November 23, 2022
Publication date:
March 30, 2023
Applicant:
Röhm GmbH
Inventors:
Florian ZSCHUNKE, Belaid Ait Aissa, Andreas Rühling, Gerhard Kölbl, Steffen Krill, Daniel Helmut König
Abstract: A process can be used for producing methacrylic acid or a methacrylic acid ester. The process involves producing acrolein, reacting the produced acrolein with hydrogen to produce propanal, reacting the propanal with formaldehyde to produce methacrolein, and oxidizing the methacrolein in the presence of an oxygen containing gas and optionally an alcohol, to obtain methacrylic acid or methacrylic acid ester.
Type:
Application
Filed:
November 17, 2022
Publication date:
March 16, 2023
Applicant:
Röhm GmbH
Inventors:
Alexander MAY, Steffen Krill, Marcel Treskow, Diego Carambia, Gabriel Avella
Abstract: 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:
Grant
Filed:
September 15, 2020
Date of Patent:
January 24, 2023
Assignee:
Röhm GmbH
Inventors:
Florian Zschunke, Belaid Ait Aissa, Andreas Rühling, Gerhard Kölbl, Steffen Krill, Daniel Helmut König
Abstract: 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:
Grant
Filed:
August 20, 2020
Date of Patent:
January 3, 2023
Assignee:
Röhm GmbH
Inventors:
Rudolf Burghardt, Steffen Krill, Florian Zschunke, Eduard Rundal, Torsten Panak, Daniel Helmut König