Patents by Inventor Stefan Hilf
Stefan Hilf 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: 12116546Abstract: A polyester is useful as a high viscosity base fluid. A method for its preparation involves isomerizing an alpha-olefin, epoxidizing an internal olefin, reacting an internal epoxide, and isolating the polyester. Lubricant compositions can contain such polyesters and the compositions are useful as automatic transmission fluids, manual transmission fluids, continuously variable transmission fluids, gear oil formulations, industrial gear oil formulations, axle fluid formulations, dual clutch transmission fluids, dedicated hybrid transmission fluids, or as hydraulic oils.Type: GrantFiled: July 1, 2021Date of Patent: October 15, 2024Assignee: Evonik Operations GmbHInventors: Stefan Karl Maier, Peter Altenbuchner, Fabian Ziegler, Christiane Zatocil, Stefan Hilf, Emily Clare Schweißinger, Jens Elsner
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Patent number: 12098344Abstract: A polyester is useful as a high viscosity base fluid. A method for its preparation involves epoxidizing an alpha-olefin, reacting the alpha-epoxide or diol with a saturated linear aliphatic dicarboxylic acid, and isolating the polyester. Lubricant compositions can contain such polyesters and the compositions are useful as automatic transmission fluids, manual transmission fluids, continuously variable transmission fluids, gear oil formulations, industrial gear oil formulations, axle fluid formulations, dual clutch transmission fluids, dedicated hybrid transmission fluids, or as hydraulic oils.Type: GrantFiled: July 1, 2021Date of Patent: September 24, 2024Assignee: Evonik Operations GmbHInventors: Stefan Karl Maier, Peter Altenbuchner, Fabian Ziegler, Christiane Zatocil, Stefan Hilf, Emily Clare Schweiβinger, Jens Elsner
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Patent number: 11981877Abstract: Acrylate-olefin copolymers and a method for the preparation of these copolymers are provided. Lubricant compositions can contain the aforementioned copolymers. The copolymers are useful as a lubricant additive or a synthetic base fluid in a lubricating oil composition, preferably in a gear oil composition, a transmission oil composition, a hydraulic oil composition, an engine oil composition, a marine oil composition, an industrial lubricating oil composition or in grease.Type: GrantFiled: May 22, 2023Date of Patent: May 14, 2024Assignee: Evonik Operations GmbHInventors: Emily Clare Schweißinger, Stefan Karl Maier, Katja Nothdurft, Yvonne Groß-Onnebrink, Dieter Janßen, Holger Pletsch, Stefan Hilf, Denise Kleinschmidt, Sebastian Babik
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Patent number: 11965140Abstract: Low molecular weight polyalkyl acrylate polymers can be used as high viscosity base fluids. A corresponding method can be used for their preparation. Lubricant compositions may contain such low molecular weight polyalkyl acrylate polymers and the compositions may be used as automatic transmission fluids, manual transmission fluids, continuously variable transmission fluids, gear oil formulations, industrial gear oil formulations, axle fluid formulations, dual clutch transmission fluids, dedicated hybrid transmission fluids, or hydraulic oils.Type: GrantFiled: December 12, 2019Date of Patent: April 23, 2024Assignee: Evonik Operations GmbHInventors: Stefan Karl Maier, Michael Neusius, Qi Xiao, Gabriela Fedor, Stefan Hilf, Frank-Olaf Mähling
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Publication number: 20230383212Abstract: Acrylate-olefin copolymers and a method for the preparation of these copolymers are provided. Lubricant compositions can contain the aforementioned copolymers. The copolymers are useful as a lubricant additive or a synthetic base fluid in a lubricating oil composition, preferably in a gear oil composition, a transmission oil composition, a hydraulic oil composition, an engine oil composition, a marine oil composition, an industrial lubricating oil composition or in grease.Type: ApplicationFiled: May 22, 2023Publication date: November 30, 2023Applicant: Evonik Operations GmbHInventors: Emily Clare SCHWEIßINGER, Stefan Karl Maier, Katja Nothdurft, Yvonne Groß-Onnebrink, Dieter Janßen, Holger Pletsch, Stefan Hilf, Denise Kleinschmidt, Sebastian Babik
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Publication number: 20230257674Abstract: A polyester is useful as a high viscosity base fluid. A method for its preparation involves epoxidizing an alpha-olefin, reacting the alpha-epoxide or diol with a saturated linear aliphatic dicarboxylic acid, and isolating the polyester. Lubricant compositions can contain such polyesters and the compositions are useful as automatic transmission fluids, manual transmission fluids, continuously variable transmission fluids, gear oil formulations, industrial gear oil formulations, axle fluid formulations, dual clutch transmission fluids, dedicated hybrid transmission fluids, or as hydraulic oils.Type: ApplicationFiled: July 1, 2021Publication date: August 17, 2023Applicant: Evonik Operations GmbHInventors: Stefan Karl Maier, Peter Altenbuchner, Fabian Ziegler, Christiane Zatocil, Stefan Hilf, Emily Clare Schweißinger, Jens Elsner
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Publication number: 20230257673Abstract: A polyester is useful as a high viscosity base fluid. A method for its preparation involves isomerizing an alpha-olefin, epoxidizing an internal olefin, reacting an internal epoxide, and isolating the polyester. Lubricant compositions can contain such polyesters and the compositions are useful as automatic transmission fluids, manual transmission fluids, continuously variable transmission fluids, gear oil formulations, industrial gear oil formulations, axle fluid formulations, dual clutch transmission fluids, dedicated hybrid transmission fluids, or as hydraulic oils.Type: ApplicationFiled: July 1, 2021Publication date: August 17, 2023Applicant: Evonik Operations GmbHInventors: Stefan Karl MAIER, Peter Altenbuchner, Fabian Ziegler, Christiane Zatocil, Stefan Hilf, Emily Clare Schweißinger, Jens Elsner
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Patent number: 11618797Abstract: The invention relates to acrylate-olefin copolymers and to a method for preparing these polymers. The present invention is also directed to lubricant compositions comprising these copolymers, and to the use of these copolymers as a lubricant additive or a synthetic base fluid in a lubricating oil composition, preferably in a gear oil composition, a transmission oil composition, a hydraulic oil composition, an engine oil composition, a marine oil composition, an industrial lubricating oil composition or in grease.Type: GrantFiled: December 6, 2021Date of Patent: April 4, 2023Assignee: Evonik Operations GmbHInventors: Stefan Karl Maier, Dieter Janßen, Fabian Ziegler, Katrin Schöller, Stefan Hilf
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Publication number: 20220372388Abstract: Low molecular weight polyalkyl acrylate polymers can be used as high viscosity base fluids. A corresponding method can be used for their preparation. Lubricant compositions may contain such low molecular weight polyalkyl acrylate polymers and the compositions may be used as automatic transmission fluids, manual transmission fluids, continuously variable transmission fluids, gear oil formulations, industrial gear oil formulations, axle fluid formulations, dual clutch transmission fluids, dedicated hybrid transmission fluids, or hydraulic oils.Type: ApplicationFiled: December 12, 2019Publication date: November 24, 2022Applicant: Evonik Operations GmbHInventors: Stefan Karl Maier, Michael Neusius, Qi Xiao, Gabriela Fedor, Stefan Hilf, Frank-Olaf Mähling
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Publication number: 20220195091Abstract: The invention relates to acrylate-olefin copolymers and to a method for preparing these polymers. The present invention is also directed to lubricant compositions comprising these copolymers, and to the use of these copolymers as a lubricant additive or a synthetic base fluid in a lubricating oil composition, preferably in a gear oil composition, a transmission oil composition, a hydraulic oil composition, an engine oil composition, a marine oil composition, an industrial lubricating oil composition or in grease.Type: ApplicationFiled: December 6, 2021Publication date: June 23, 2022Applicant: Evonik Operations GmbHInventors: Stefan Karl Maier, Dieter Janßen, Fabian Ziegler, Katrin Schöller, Stefan Hilf
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Patent number: 10494495Abstract: The invention concerns specifically emulsion polymers which are intraparticulately crosslinked via a hetero-Diels-Alder (HDA) mechanism. The crosslinked polymers can then be wholly or partly decrosslinked by thermal processing, for example in the form of a composite matrix, via a retro-Diels-Alder or retro-hetero-Diels-Alder reaction and interparticulately recrosslinked on cooling. This makes it possible to prepare long shelf life prepregs for composites. But it is also possible to thus realize other materials that have thermoset properties at use temperature but thermoplastic processing properties at a higher temperature.Type: GrantFiled: July 30, 2015Date of Patent: December 3, 2019Assignee: EVONIK DEGUSSA GmbHInventors: Friedrich Georg Schmidt, Stefan Hilf, Florian Hermes, Dorothea Staschik, Thomas Eurich, Rebecca Pieroth
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Patent number: 10030105Abstract: The invention relates to low molecular mass products and to the use thereof as reversible or permanent low-temperature crosslinkers in Diels-Alder reactions.Type: GrantFiled: June 29, 2012Date of Patent: July 24, 2018Assignee: Evonik Degussa GmbHInventors: Friedrich Georg Schmidt, Stefan Hilf, Emmanouil Spyrou, Jiawen Zhou, Nathalie Guimard, Christopher Barner-Kowollik, Kim Klaus Oehlenschlaeger, Andre Hennig
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Patent number: 9862788Abstract: The present invention relates to an innovative (meth)acrylic reactive resin which cures with low odor or odorlessly. The present invention relates more particularly to reactive resins comprising high-boiling, reactive (meth)acrylic monomers from the group of the polar, cyclically substituted esters of (meth)acrylic acid, more particularly glycerol acetal, ketal or carbonate methacrylates. These new components are used as substitutes for MMA, which represents the major part of the odor nuisance in the existing, prior-art reactive resin systems. Using these new components it is possible to obtain resin formulations which have glass transition temperatures similar to, and properties comparable with, MMA-based resins. The innovative reactive resins are able in addition to exhibit more rapid curing than prior-art MMA-based systems. Reactive resins for the purposes of the invention are reactive monomer mixtures or mixtures of monomers and polymers that when used as a 2-component system can be readily cured.Type: GrantFiled: July 2, 2012Date of Patent: January 9, 2018Assignee: Evonik Roehm GmbHInventors: Stefan Hilf, Alexander Klein, Heike Heeb, Ingrid Kizewski, Sebastian Grimm, Michael Flittner
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Publication number: 20170218149Abstract: The invention concerns specifically emulsion polymers which are intraparticulately crosslinked via a hetero-Diels-Alder (HDA) mechanism. The crosslinked polymers can then be wholly or partly decrosslinked by thermal processing, for example in the form of a composite matrix, via a retro-Diels-Alder or retro-hetero-Diels-Alder reaction and interparticulately recrosslinked on cooling. This makes it possible to prepare long shelf life prepregs for composites. But it is also possible to thus realize other materials that have thermoset properties at use temperature but thermoplastic processing properties at a higher temperature.Type: ApplicationFiled: July 30, 2015Publication date: August 3, 2017Applicant: EVONIK DEGUSSA GMBHInventors: Friedrich Georg SCHMIDT, Stefan HILF, Florian HERMES, Dorothea STASCHIK, Thomas EURICH, Rebecca PIEROTH
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Patent number: 9670295Abstract: A block-copolymer containing at least two different blocks wherein block A contains (meth)acrylate monomers the copolymer having a glass transition temperature of less than 15° C., block B contains (meth)acrylate monomers the copolymer having a glass transition temperature of more than 25° C. being free of thio-containing substances in the polymer chain, characterized in that one block contains at least one photoinitiator chemically bound to the chain.Type: GrantFiled: March 12, 2013Date of Patent: June 6, 2017Assignees: Henkel AG & Co. KGaA, Evonik Röhm GmbHInventors: Peter D. Palasz, Maria Xenidou, Kerstin van Wijk, Simon Krause, Stefan Hilf
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Patent number: 9550851Abstract: A method for the reversible crosslinking of, for example, adhesives or coating materials, and a composition stable on storage at room temperature for implementing the crosslinking reaction. The reversible crosslinking method allows very rapid crosslinking even at a low first temperature, and undoing of the crosslinks at higher temperatures, thereby recovering thermoplastic processability and, for example, allowing the originally bonded substrates to be parted from one another again easily. A particular aspect is that a plurality of cycles of crosslinking and undoing of the crosslinks are possible with the present system. A feature of the system used for the reversible crosslinking is that it contains two components, A and B, where component A is a compound having at least two protected dithioester functionalities, preferably cyanodithioester functionalities, and component B is a compound having at least two diene functionalities.Type: GrantFiled: November 11, 2013Date of Patent: January 24, 2017Assignee: EVONIK ROEHM GmbHInventors: Christopher Barner-Kowollik, Kim Klaus Oehlenschlaeger, Stefan Hilf, Friedrich Georg Schmidt, Nathalie Guimard, Jan Mueller
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Publication number: 20160304683Abstract: The invention relates to a method for the production of storage-stable prepregs and moulded objects produced therefrom (composite components). The composition used according to the invention for the production of the prepregs here contains A) monomers, in particular (meth)acrylates and/or styrene, B) at least one (meth)acrylate with a residue which contains a conjugated diene, C) a crosslinker having at least two dienophilic groups, and D) at least one suitable initiator. Alternatively, instead of or additionally to the components B) and C), the composition can contain a product C? of a Diels-Alder reaction of the two components B) and C).Type: ApplicationFiled: November 6, 2014Publication date: October 20, 2016Applicant: EVONIK DEGUSSA GmbHInventors: Friedrich Georg SCHMIDT, Stefan Hilf, Michael Kube, Zuhal Tuncay
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Patent number: 9169363Abstract: In the present process, reversibly crosslinking composites or storage-stable prepregs are produced by means of a hetero Diels-Alder reactions (HDA,) for example of PMMA polymers. At slightly elevated temperature, these prepregs can be reversibly decrosslinked again by a retro hetero Diels-Alder reaction so that they become moldable. The back-reaction to products which are again crosslinked or high molecular weight then takes place at room temperature.Type: GrantFiled: November 6, 2012Date of Patent: October 27, 2015Assignee: EVONIK DEGUSSA GmbHInventors: Friedrich Georg Schmidt, Stefan Hilf
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Publication number: 20150299363Abstract: The present invention relates to an innovative method for the reversible crosslinking of, for example, adhesives or coating materials, and to a composition stable on storage at room temperature for implementing this crosslinking reaction. The reversible crosslinking method allows very rapid crosslinking even at a low first temperature, and undoing of the crosslinks at higher temperatures, thereby recovering thermoplastic processability and, for example, allowing the originally bonded substrates to be parted from one another again easily. A particular aspect here is that a plurality of cycles of crosslinking and undoing of the crosslinks are possible with the present system. A feature of the system used for the reversible crosslinking is that it consists of two components, A and B, in which component A is a compound comprising at least two protected dithioester functionalities, preferably cyanodithioester functionalities, and component B is a compound having at least two diene functionalities.Type: ApplicationFiled: November 11, 2013Publication date: October 22, 2015Applicant: Evonik Roehm GmbHInventors: Christopher BARNER-KOWOLLIK, Kim Klaus OEHLENSCHLAEGER, Stefan HILF, Friedrich Georg SCHMIDT, Nathalie GUIMARD, Jan MUELLER
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Patent number: 8987380Abstract: The present invention relates to an innovative method for controlling the viscosity of, for example, adhesives or coating formulations. The method for controlling viscosity allows very rapid thermoplastic curing of a formulation even at room temperature and a significant reduction in the viscosity at higher temperatures, thereby regaining the capacity for simple processing and allowing, for example, the originally bonded substrates to be separated from one another again with ease. A particular aspect in this context is that a plurality of cycles of thermoplastic curing and a significant reduction in the viscosity are possible with the present system.Type: GrantFiled: January 4, 2011Date of Patent: March 24, 2015Assignee: Evonik Roehm GmbHInventors: Stefan Hilf, Friedrich Georg Schmidt, Andre Hennig, Simon Krause, Christopher Barner-Kowollik, Andrew John Inglis, Leena Nebhani