Abstract: A coating composition is described, for use in the foundry, in particular comprising particulate, amorphous silicon dioxide (SiO2) and an aqueous phase having a pH of at most 5, and also coated, waterglass-bound foundry molding elements, especially coated, waterglass-bound foundry molds and foundry cores, which each comprise a coating composition of the invention. Further described is the use of a coating composition of the invention for producing a coating on a waterglass-bound foundry molding element and a method for producing a waterglass-bound foundry molding element (mold or core) coated with a water-containing refractory coating. Likewise specified is a kit whose contents include a coating composition of the invention.
Type:
Application
Filed:
August 4, 2022
Publication date:
November 24, 2022
Applicant:
Hüttenes-Albertus Chemische Werke Gesellschaft Mit Beschränkter Haftung
Inventors:
Andreas JATTKE, Christian LUSTIG, Sabrina Maria ANDERTEN, Klaus SEEGER
Abstract: The present invention relates to a mold material mixture for producing moldings for the foundry industry, in particular for producing foundry molds, cores or feeders for the foundry industry, which comprises A) one or more pourable, refractory fillers, B) a binder system comprising i) formaldehyde, a formaldehyde donor and/or precondensates of formaldehyde and ii) an amino acid. The present invention additionally relates to the use of amino acids in a mold material mixture for producing moldings for the foundry industry or for producing moldings for the foundry industry, a process for producing a mold material mixture and a process for producing a molding for the foundry industry.
Type:
Grant
Filed:
November 28, 2017
Date of Patent:
May 24, 2022
Assignee:
HÜTTENES-ALBERTUS CHEMISCHE WERKE GESELLSCHAFT MIT BESCHRÄNKTER HAFTUNG
Inventors:
Jaime Díaz Fernández, Wolfgang Seelbach
Abstract: An inflow base which is permeable to process air and includes openings for the process air which flows thought the inflow base. The inflow base is arranged in the fluidizing apparatus in a manner rotatable about an axis Z of the fluidizing apparatus and subdivides this into a distribution chamber and into a vortex chamber. The inflow base of the fluidizing apparatus includes at least a first and a second inflow base plate, wherein one of the inflow base plates at its outer end includes or forms a sealing element.
Type:
Grant
Filed:
May 20, 2019
Date of Patent:
May 10, 2022
Assignee:
Glatt Gesellschaft mit beschränkter Haftung
Abstract: Described is a method of preparing a particulate refractory composition for use in the manufacture of foundry moulds and cores from spent foundry moulds or cores formed of refractory material and a binder containing water glass, the method comprising the following steps: providing broken material from spent foundry moulds or cores or preparing broken material from spent foundry moulds or cores, wherein the broken material comprises particles and/or aggregates of particles of refractory material having hardened water glass binder on their surface, mixing the broken material with particulate amorphous oxide comprising silicon dioxide in an amount of 85% by weight or more, based on the total amount of the particulate amorphous oxide, to give a mixture and subjecting the mixture to a heat treatment at a temperature of 400° C. or higher. Also described are a corresponding use, a reclamation mixture, and a method of making a foundry mould or core.
Type:
Grant
Filed:
September 6, 2019
Date of Patent:
April 26, 2022
Assignee:
HÜTTENES-ALBERTUS CHEMISCHE WERKE GESELLSCHAFT MIT BESCHRÄNKTER HAFTUNG
Inventors:
Xin Li, Christian Lustig, Mirko Reinold, Maria Schweinefuß, Nicolas Egeler
Abstract: What are described are a process for producing an insulating product for the refractory industry or an insulating material as intermediate for production of such a product, and a corresponding insulating material/insulating product. Likewise described are the use of a matrix encapsulation process in the production of an insulating product for the refractory industry and a corresponding insulating product and/or an insulating material as intermediate for production of such a product.
Type:
Grant
Filed:
May 30, 2018
Date of Patent:
March 8, 2022
Assignee:
HÜTTENES-ALBERTUS CHEMISCHE WERKE GESELLSCHAFT MIT BESCHRÄNKTER HAFTUNG
Inventors:
Sandra Lehmann, Klaus Riemann, Nils Zimmer, Hermann Lieber, Jürgen Hübert, Fabio Sola, Heike Mushardt
Abstract: What is described are isocyanate compositions comprising ?-dicarbonyl compounds and a binder system, especially for use in a process from the group consisting of polyurethane cold-box process and polyurethane no-bake process, with this isocyanate composition as polyisocyanate component.
Type:
Application
Filed:
December 10, 2019
Publication date:
March 3, 2022
Applicant:
HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung
Abstract: A process (i) for producing a metal casting or (ii) for producing a cured shaped part for use in the casting of metallic castings is described. Furthermore, the use of an aliphatic polymer which comprises structural units containing hydroxy groups and has been crosslinked by etherification as binder of a shaped part for use in the casting of metallic castings is described. A shaped part for use in the casting of metallic castings, comprising at least one base mould material and a cured binder comprising or consisting of an aliphatic polymer which comprises structural units containing hydroxy groups and has been crosslinked by etherification, is likewise described. In addition, a cured shaped part which is producible by a process according to the invention and also a mould material mixture for use in the process of the invention are described.
Type:
Grant
Filed:
December 18, 2018
Date of Patent:
February 22, 2022
Assignee:
HÜTTENES-ALBERTUS CHEMISCHE WERKE GESELLSCHAFT MIT BESCHRÄNKTER HAFTUNG
Inventors:
Klaus Riemann, Nicola Mancini, Gérard Ladégourdie, Hermann Lieber, Nils Zimmer, Jürgen Hübert
Abstract: The present invention relates to a phenolic resin for use in the phenolic resin component of a two-component binder system for the polyurethane cold box process, to a two-component binder system for use in the polyurethane cold box process, to a molding material mixture for curing by contacting with a tertiary amine, to the use of a corresponding phenolic resin, of a corresponding phenol component, of a corresponding two-component binder system or of a corresponding molding material mixture. The present invention relates, moreover, to an article from the group consisting of feeders, foundry molds and foundry cores, producible from a corresponding molding material mixture, to a process for preparing a phenolic resin, and to a process for producing an article from the group consisting of feeders, foundry molds and foundry cores.
Type:
Grant
Filed:
December 21, 2017
Date of Patent:
January 25, 2022
Assignee:
HÜTTENES-ALBERTUS CHEMISCHE WERKE GESELLSCHAFT MIT BESCHRÄNKTER HAFTUNG
Inventors:
Gérard Ladégourdie, Ursula Nitsch, Klaus Jenrich
Abstract: The invention relates to a device comprising a first optical Mach-Zehnder interferometric sensor (MZI1) with a large FSR, wherein a plasmonic waveguide (107) thin-film or hybrid slot, is incorporated as transducer element planar integrated on Si3N4 photonic waveguides and a second optical interferometric Mach-Zehnder (MZI2), both comprising thermo-optic phase shifters (104, 106) for optimally biasing said MZI sensor (MZI1) and MZI as variable optical attenuator VOA.
Type:
Grant
Filed:
February 20, 2018
Date of Patent:
December 21, 2021
Assignees:
Aristotle University of Thessaloniki-Research Committee E.L.K.E, AMO GmbH Gesellschaft für Angewandte Mikro- und Optoelektronic Mit Beschränkter Haftung
Abstract: Described is a method of preparing a particulate refractory composition for use in the manufacture of foundry moulds and cores from spent foundry moulds or cores formed of refractory material and a binder containing water glass, the method comprising the following steps: providing broken material from spent foundry moulds or cores or preparing broken material from spent foundry moulds or cores, wherein the broken material comprises particles and/or aggregates of particles of refractory material having hardened water glass binder on their surface, mixing the broken material with particulate amorphous oxide comprising silicon dioxide in an amount of 85% by weight or more, based on the total amount of the particulate amorphous oxide, to give a mixture and subjecting the mixture to a heat treatment at a temperature of 400° C. or higher. Also described are a corresponding use, a reclamation mixture, and a method of making a foundry mould or core.
Type:
Application
Filed:
September 6, 2019
Publication date:
November 4, 2021
Applicant:
HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung
Inventors:
Xin LI, Christian LUSTIG, Mirko REINOLD, Maria SCHWEINEFUß, Nicolas EGELER
Abstract: What are described is a process for producing casting molds, cores and mold base materials regenerated therefrom, a mixture for combination with a solution or dispersion comprising waterglass for production of casting molds and/or cores, a molding material mixture, a mold base material mixture, and a casting mold or a core. What is also described is the corresponding use of an amount of particulate sheet silicates having a d90 of less than 45 ?m or a corresponding mixture as additive for production of a molding material mixture comprising waterglass and particulate amorphous silicon dioxide, which is cured by chemical reaction of constituents of the molding material mixture with one another, in the production of a casting mold or a core, to facilitate the breakdown and/or to increase the regeneratability of the casting mold or core.
Type:
Grant
Filed:
April 5, 2018
Date of Patent:
July 20, 2021
Assignee:
HÜTTENES-ALBERTUS CHEMISCHE WERKE GESELLSCHAFT MIT BESCHRÄNKTER HAFTUNG
Inventors:
Lukas Mirko Reinold, Maria Schweinefuss, Christian Lustig
Abstract: The invention relates to a refractory coating composition for producing mold coatings on non-permanent molds or on cores for the casting of iron and steel, comprising a) an alkali metal salt or alkaline earth metal salt of carbonic acid and/or an alkali metal salt or alkaline earth metal salt of diphosphoric acid, b) a carrier liquid and c) refractory materials.
Type:
Grant
Filed:
June 29, 2017
Date of Patent:
June 8, 2021
Assignee:
HÜTTENES-ALBERTUS CHEMISCHE WERKE GESELLSCHAFT MIT BESCHRÄNKTER HAFTUNG
Abstract: What is described is the use of a composition containing one or more formaldehyde scavengers for production of a coating on a main body of a mold or core for metal casting that emits formaldehyde when heated, wherein the coating forms a surface of the mold or core that comes into contact with a metal melt in the casting operation.
Type:
Application
Filed:
July 26, 2019
Publication date:
June 3, 2021
Applicant:
HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung
Inventors:
Gérard LADÉGOURDIE, Bernd DONNER, Klaus SEEGER
Abstract: The present invention relates to liquid-crystalline media (LC media) having negative or positive dielectric anisotropy comprising self-aligning mesogens (SAMs) which effect homeotropic (vertical) alignment of the LC media at a surface or the cell walls of a liquid-crystal display (LC display). The invention therefore also encompasses LC displays having homeotropic alignment of the liquid-crystalline medium (LC medium) without conventional imide alignment layers. The LC media may be supplemented by a polymerisable or polymerised component, which serves for stabilisation of the alignment, for adjustment of the tilt angle and/or as passivation layer.
Type:
Grant
Filed:
April 29, 2019
Date of Patent:
May 25, 2021
Assignee:
MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
Abstract: Described are a composition comprising furfuryl silicates and furfuryl alcohol, especially for use as acid-curable binder, and processes for producing such a composition.
Type:
Application
Filed:
July 30, 2018
Publication date:
May 6, 2021
Applicant:
HÜTTENES-ALBERTUS CHEMISCHE WERKE GESELLSCHAFT MIT BESCHRÄNKTER HAFTUNG
Inventors:
David STRUNK, Christian FOURBERG, Gérard LADÉGOURDIE, Norbert BENZ
Abstract: A process (i) for producing a metal casting or (ii) for producing a cured shaped part for use in the casting of metallic castings is described. Furthermore, the use of an aliphatic polymer which comprises structural units containing hydroxy groups and has been crosslinked by etherification as binder of a shaped part for use in the casting of metallic castings is described. A shaped part for use in the casting of metallic castings, comprising at least one base mould material and a cured binder comprising or consisting of an aliphatic polymer which comprises structural units containing hydroxy groups and has been crosslinked by etherification, is likewise described. In addition, a cured shaped part which is producible by a process according to the invention and also a mould material mixture for use in the process of the invention are described.
Type:
Application
Filed:
December 18, 2018
Publication date:
April 29, 2021
Applicant:
HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung
Inventors:
Klaus Riemann, Nicola Mancini, Gérard Ladégourdie, Hermann Lieber, Nils Zimmer, Jürgen Hübert
Abstract: A description is given of a method for producing a molding material mixture or for producing a molding material mixture and a molding therefrom, preferably casting molds or cores, for use in the foundry industry, where the molding material mixture comprises a mold base material and a solution or dispersion comprising lithium-containing waterglass, comprising the following steps: (1) producing or providing a kit at least comprising as separate components: (K1) an aqueous solution or dispersion comprising waterglass and (K2a) a first waterglass-free solution or dispersion comprising lithium ions in solution in water, and also preferably (K2b) a second waterglass-free solution or dispersion, preferably comprising lithium ions in solution in water with a lower concentration than in component (K2a), and thereafter (2) producing a mixture of the mold base material with a fraction of component (K1) and with a fraction of component (K2a), and also optionally with a fraction of component (K2b).
Type:
Grant
Filed:
June 28, 2018
Date of Patent:
April 20, 2021
Assignee:
HÜTTENES-ALBERTUS CHEMISCHE WERKE GESELLSCHAFT MIT BESCHRÄNKTER HAFTUNG
Inventors:
Christian Lustig, Marcin Baldy, Edgar Müller, Lukas Mirko Reinold, Sabrina Maria Anderten, Maria Schweinefuß, René Vargovic
Abstract: What are described is a process for producing casting molds, cores and mold base materials regenerated therefrom, a mixture for combination with a solution or dispersion comprising waterglass for production of casting molds and/or cores, a molding material mixture, a mold base material mixture, and a casting mold or a core. What is also described is the corresponding use of an amount of particulate sheet silicates having a d90 of less than 45 ?m or a corresponding mixture as additive for production of a molding material mixture comprising waterglass and particulate amorphous silicon dioxide, which is cured by chemical reaction of constituents of the molding material mixture with one another, in the production of a casting mold or a core, to facilitate the breakdown and/or to increase the regeneratability of the casting mold or core.
Type:
Application
Filed:
April 5, 2018
Publication date:
April 15, 2021
Applicant:
HÜTTENES-ALBERTUS CHEMISCHE WERKE GESELLSCHAFT MIT BESCHRÄNKTER HAFTUNG
Inventors:
Lukas Mirko REINOLD, Maria SCHWEINEFUSS, Christian LUSTIG