Abstract: Polymer foams based on polyetherimides (PEIs) fulfill the legal specifications demanded by the aviation industry for aircraft interiors. Specifically, the demands on fire characteristics, stability to media and mechanical properties constitute a great challenge here. According to related art, suitable polymer foams are produced as semi-finished products. Reprocessing to give shaped articles is uneconomic in terms of time and material exploitation, for example by virtue of large amounts of cutting waste. The material is suitable in principle and can be processed to give particle foam mouldings. These mouldings can be produced without reprocessing in short cycle times and, hence, economically. Furthermore, this gives rise to new means of functional integration, for example by direct incorporation of inserts etc. in the foam, and with regard to freedom in terms of design.
Type:
Application
Filed:
December 7, 2022
Publication date:
April 6, 2023
Applicant:
Evonik Operations GmbH
Inventors:
Christian TRAßL, Denis Holleyn, Kay Bernhard
Abstract: An aqueous polymer dispersion is based on copolymers of alkyl (meth)acrylates having long side chains and unsaturated carboxylic acids. The aqueous polymer dispersion also contains at least one cosolvent and an emulsifier system containing at least one emulsifier from the group of sulfosuccinates.
Type:
Application
Filed:
March 25, 2021
Publication date:
April 6, 2023
Applicant:
Evonik Operations GmbH
Inventors:
Helge Schenderlein, Gerold Schmitt, Martina Ebert, Hans-Jörg Oschmann
Abstract: A process for the production of a fibre-composite material, the process including the following steps: a) a fibre bundle is conducted over at least one deflection bar having radially circumferential rounded elevations, thus being expanded; b) the expanded fibre bundle is subsequently drawn into an impregnation chamber; c) a melt is applied to the expanded fibre bundle; and d) the fibre bundle impregnated with melt is drawn through a take-off die at the end of the apparatus, and a corresponding device, which achieves very good impregnation quality.
Abstract: 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:
Grant
Filed:
December 6, 2021
Date of Patent:
April 4, 2023
Assignee:
Evonik Operations GmbH
Inventors:
Stefan Karl Maier, Dieter Janßen, Fabian Ziegler, Katrin Schöller, Stefan Hilf
Abstract: A one-pot synthesis of polymerizable and acyclic urea (meth)acrylates, preferably mono(meth)acrylates, can be performed via in-situ synthesis of urea alcohols or amines followed by direct reaction with a (meth)acrylate reactive diluent. The urea alcohol/amine is obtained from isocyanates and alcohols, amines, or hydroxyamines. Subsequently, the reaction with the (meth)acrylate reactive diluent takes place and the urea (meth)acrylate is directly obtained either in solution with the reactive diluent, or as a pure material after removal of the reactive diluent.
Abstract: An aqueous polymer dispersion is based on alkyl (meth)acrylates having long side chains. The aqueous polymer dispersion also contains at least one cosolvent and an emulsifier system containing at least two emulsifiers from the group of sulfosuccinates.
Type:
Application
Filed:
March 25, 2021
Publication date:
March 30, 2023
Applicant:
Evonik Operations GmbH
Inventors:
Helge SCHENDERLEIN, Gerold Schmitt, Martina Ebert, Hans-Jörg Oschmann
Abstract: A trichlorogermanide of formula (I): [R4N]/[R4P]Cl[GeCl3] (I), where R is Me, Et, iPr, nBu, or Ph, tris(trichlorosilyl)germanide of formula (II): [R4N]/[R4P][Ge(SiCl3)3] (II), where R is Me, Et, iPr, nBu, or Ph, a tris(trichlorosilyl)germanide adduct of GaCl3 of formula (III): [Ph4P][Ge(SiCl3)3*GaCl3], and a tris(trichlorosilyl)germanide adduct of BBr3 of formula (IV): [Ph4P][Ge(SiCl3)3*BBr3]. Also, methods for preparing the trichlorogermanides of formula (I), the tris(trichlorosilyl)germanide of formula (II), the tris(trichlorosilyl)germanide adduct of BBr3 of formula (IV).
Abstract: A method for controlling a chemical process, by preparing methanol, hydrogen sulfide, methyl mercaptan, hydrocyanic acid, acrolein, 3-methylthiopropionaldehyde, 5-(2-methylmercaptoethyl)-hydantoin, methionine, a salt of methionine, and a derivative of methionine. The method includes providing a training set TS1, wherein TS1 is process values PV1 and process values PV2 being correlated to one another, and/or laboratory values LV1 and process values PV2 being correlated to one another. The method includes training a processing unit on the training set TS1 to identify a pattern of correlation between one or more measured process variables and at least one process variable. The method includes developing a calibration function CF1 for a calibrated soft sensor from the identified pattern of correlation and predicting at least one operating parameter for the chemical process as an approximation to LV1 and/or PV1. A system for controlling a chemical process.
Type:
Application
Filed:
February 18, 2021
Publication date:
March 30, 2023
Applicant:
Evonik Operations GmbH
Inventors:
Thomas LAMMERSEN, Benny HARTONO, Hans-Joachim HASSELBACH, Danny DE CORTE
Abstract: A process is described for producing PU foams, especially rigid PU foams, based on foamable reaction mixtures containing polyisocyanates, compounds having reactive hydrogen atoms, blowing agents, foam stabilizers, and possibly further additives, wherein polymer particles are additionally used, the average particle size of the polymer particles being <100 ?m, preferably <70 ?m, especially 5 to 50 ?m.
Abstract: The present invention relates to a process for the preparation of methionine comprising the step of contacting a solution or suspension comprising 2-amino-4-(methylthio)butanenitrile and/or 2-amino-4-(methylthio)butaneamide with water in the presence of a catalyst to give a methionine comprising mixture, wherein the catalyst comprises CeO2 comprising particles, wherein the CeO2 comprising particles comprise from 50 to 100 wt.-% of CeO2, have a BET surface area of from 35 to 65 m2/g measured according to DIN ISO 9277-5 (2003), a mean maximum Feret diameter xFmax, mean of from 10 to 40 nm and a mean minimum Feret diameter xFmin, mean of from 5 to 30 nm, both measured according to DIN ISO 9276-6 (2012).
Type:
Grant
Filed:
February 3, 2020
Date of Patent:
March 28, 2023
Assignee:
Evonik Operations GmbH
Inventors:
Juergen Bilz, Cornelia Borgmann, Achim Fischer, Lucas Geist, Anja Nordschild, Christian Renner, Christian Reus, Axel Ronneburg
Abstract: A process for ring hydrogenation of dialkyl terephthalates having C3- to C16-alkyl groups can be performed in a hydrogenation unit composed of two reaction units in series. In the process, a suitable process parameter in relation to the first reaction unit is adjusted so that a certain reaction conversion is achieved.
Type:
Application
Filed:
September 13, 2022
Publication date:
March 23, 2023
Applicant:
Evonik Operations GmbH
Inventors:
Horst-Werner Zanthoff, Julia Bauer, Michael Grass, Thomas Schneider
Abstract: A process can be used for preparing a polymer coated hard-shell capsule, filled with a fill containing a biologically active ingredient. The hard-shell capsule contains a body and a cap, and in a closed state, the cap overlaps the body either in a pre-locked state or in a final-locked state. The material of the body and the cap contains an ethyl-, methyl-, or propyl-ether of cellulose, starch, or pullulan. The hard-shell capsule is coated with a coating layer that covers the hard-shell capsule in the pre-locked state. The coating layer contains one or more (meth)acrylate copolymers, where the coating layer is present in an amount of about 1 to 5.8 mg/cm2. The process involves providing the polymer-coated hard-shell capsule in the pre-locked state to a capsule-filling machine, separating the body and the cap, filling the body with the fill, and rejoining the body and the cap in the final-locked state.
Type:
Application
Filed:
November 11, 2022
Publication date:
March 23, 2023
Applicant:
Evonik Operations GmbH
Inventors:
Vinay Jain, Ashish Guha, Shraddha Joshi, Felix Hofmann, Bettina Hölzer, Hans Bär
Abstract: A novel urea (meth)acrylate can be prepared by a process involving reacting a urea containing alcohol or amine with a (meth)acrylate, (meth)acryloyl chloride, (meth)acrylic acid, or (meth)acrylic anhydride. A binder composition includes at least one repeating unit derived from the urea (meth)acrylate. The binder composition can be used in adhesive and coating applications.
Type:
Application
Filed:
September 8, 2022
Publication date:
March 23, 2023
Applicant:
Evonik Operations GmbH
Inventors:
Sebastian BESTGEN, Thorben Schütz, Silvia Beyer, Martin Glock, William Gordos
Abstract: A silane composition contains at least one iminosilane and at least one antioxidant. The at least one antioxidant is a sterically hindered phenol. A process can be used for the production of the silane composition.
Type:
Application
Filed:
February 9, 2021
Publication date:
March 23, 2023
Applicant:
Evonik Operations GmbH
Inventors:
Larissa Misslak, Kristine Walter, Helmut Mack
Abstract: The present invention relates to a new structural class of phenalkamines, curing agent compositions comprising the phenalkamines, their use, as well as and methods of producing such phenalkamines and compositions. The phenalkamines of the present invention can be prepared by reacting cardanol with an aldehyde compound and triaminononane. These curing-agent compositions may be used to cure, harden, and/or crosslink an epoxy resin. The curing-agent compositions of this invention are of low viscosity and can be used neat or dissolved in a minimum amount of an organic solvent or diluent to effect cure of epoxy resins.
Abstract: The present invention relates to hydrogenated linear copolymers comprising butadiene and isoprene monomer units, as well as the process for preparing these copolymers. The invention further relates to a lubricating oil composition comprising one or more hydrogenated linear copolymers according to the invention, as well as to the use of the aforementioned copolymers as a lubricant additive or a synthetic base fluid for lubricant compositions, especially in gear oils, transmission oils, hydraulic oils, engine oils, grease, marine oils or industrial lubricating oils.
Abstract: A composite body comprising a porous layer (1) made from oxide particles connected to one another and partially to a substrate, containing at least one oxide of the elements Al, Zr, Ti or Si, and comprising a further porous layer (2) at least on one side, having oxide particles connected to one another and partially to the layer (1) and containing at least one oxide of the elements Al, Zr, Ti or Si, wherein the oxide particles in the layer (1) have a greater average particle size (d50 is 0.5 to 4 ?m) than the oxide particles in the layer (2) (d50 is 0.015 to 0.15 ?m), characterised in that a polymer coating (PB) is provided on or above the layer (2), containing one or more polysiloxanes. A method for producing corresponding composite bodies and to the use thereof.
Type:
Application
Filed:
January 6, 2021
Publication date:
March 9, 2023
Applicant:
EVONIK OPERATIONS GMBH
Inventors:
Christian HYING, Oliver CONRADI, Dirk POPPE, David GRZENIA, Kira KHALETSKAYA
Abstract: The present invention provides a composite body having, on a porous substrate and in the interstices of the substrate that includes fibers, preferably of an electrically nonconductive material, a porous layer (1) composed of oxide particles bonded to one another and partly to the substrate that include at least one oxide selected from oxides of the elements Al, Zr, Ti and Si, preferably selected from Al2O3, ZrO2, TiO2 and SiO2, and having, at least on one side, a further porous layer (2) including oxide particles bonded to one another and partly to layer (1) that include at least one oxide selected from oxides of the elements Al, Zr, Ti and Si, preferably selected from Al2O3, ZrO2, TiO2 and SiO2, where the oxide particles present in layer (1) have a greater median particle size than the oxide particles present in layer (2), which is characterized in that the median particle size (d50) of the oxide particles in layer (1) is from 0.
Type:
Grant
Filed:
December 4, 2019
Date of Patent:
March 7, 2023
Assignee:
Evonik Operations GmbH
Inventors:
Christian Hying, David Grzenia, Rolf-Walter Terwonne, Bastian Matthias Brugger, Kira Khaletskaya, Oliver Conradi, Hans-Jürgen Nettelnbreker, Alexander Paasche