Patents by Inventor Dirk Achten

Dirk Achten 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).

  • Patent number: 11905360
    Abstract: The invention relates to a method for producing a polymer comprising the following steps: (A) depositing a radically cross-linkable resin, obtaining a radically cross-linked resin; and (B) treating the radically cross-linked resin under conditions which are sufficient to trigger a chemical reaction that is different from the radical cross-linking in the radically cross-linked resin. The radically cross-linkable resin comprises a curable component, in which there are NCO groups, olefinic C?C double bonds and epoxide groups, and the chemical reaction in the radically cross-linked resin that is different from the radical cross-linking is the reaction of NCO groups and epoxide groups to form oxazolidinone groups.
    Type: Grant
    Filed: October 12, 2018
    Date of Patent: February 20, 2024
    Assignee: STRATASYS, INC.
    Inventors: Dirk Achten, Thomas Buesgen, Roland Wagner, Florian Stempfle, Christoph Tomczyk
  • Publication number: 20240026196
    Abstract: An adhesive composition includes a polyurethane polymer, a solvent and a co-solvent. The polyurethane polymer is an internally and/or externally hydrophilized thermoplastic polyurethane having a mass average molecular weight Mw, as determined by gel permeation chromatography against polystyrene standards using N,N-dimethyl acetamide as the eluent, of ?50000 g/mol, the solvent is a polar-aprotic solvent such as MEK and the co-solvent is water. The polyurethane polymer, the solvent and the co-solvent are present in such amounts that they form a dispersion. The polyurethane polymer content is ?10 weight-%, based on the total weight of the composition and the weight ratio of solvent to co-solvent is in a range of ?1:1 to ?4:1.
    Type: Application
    Filed: December 2, 2021
    Publication date: January 25, 2024
    Inventors: Ann-Christin Bijlard-Jung, Dirk Achten, Fabian Schuster, Joerg Tillack
  • Publication number: 20230405921
    Abstract: It is a feature of a use of an elastic polymer for production of a porous body (in an additive manufacturing method that the porous body comprises a three-dimensional network of node points joined to one another by struts, and a void volume present between the struts, where the struts have an average length of ?200 ?m to ?50 mm and the struts (100) have an average thickness of ?100 ?m to ?5 mm. The polymer here is an elastomer selected from the following group: thermoset polyurethane elastomers (PUR), thermoplastic copolyamides (TPA), thermoplastic copolyesters (TPC), thermoplastic olefin-based elastomers (TPO), styrene block copolymers (TPS), thermoplastic urethane-based elastomers (TPU), crosslinked thermoplastic olefin-based elastomers (TPV), thermoplastic polyvinyl chloride-based elastomers (PVC), thermoplastic silicone-based elastomers and a combination of at least two of these elastomers.
    Type: Application
    Filed: August 28, 2023
    Publication date: December 21, 2023
    Applicant: STRATASYS INC.
    Inventors: Dirk Achten, Thomas Busgen, Nicolas Degiorgio, Levent Akbas, Roland Wagner, Peter Reichert, Jurgen Hattig
  • Publication number: 20230407152
    Abstract: An adhesive composition includes a polyurethane polymer, a solvent and a co-solvent. The polyurethane polymer is an internally and/or externally hydrophilized thermoplastic polyurethane having an Mw of ?50000 g/mol. The solvent is a polar-aprotic solvent. The co-solvent is selected from water, a primary alcohol having ?10 carbon atoms, a vicinal diol or a mixture of at least two of the aforementioned compounds. The solvent and the co-solvent are present in such amounts that they form a homogenous mixture without the formation of a second phase when combined together at 20° C. The hydroxyl group content is ?1 weight-%, based on the total weight of the composition. The polyurethane polymer content is ?10 weight-%, based on the total weight of the composition and the composition forms a single continuous liquid phase. Examples for solvent/co-solvent combinations are methylethyl ketone (MEK) and water or MEK and ethanol.
    Type: Application
    Filed: September 21, 2021
    Publication date: December 21, 2023
    Inventors: Dirk Achten, Fabian Schuster, Ann-Christin Bijlard-Jung, Joerg Tillack
  • Patent number: 11835103
    Abstract: A deformable body, wherein the body is constructed from a multiplicity of layers of a polymer construction material and in which a construction direction is defined perpendicular to the layers. The body preferably comprises layers with a multiplicity of curve pairs (10) which are formed by the construction material and which run in the same direction as one another, the curve pairs comprise in each case two periodic curves (20, 30) running oppositely with respect to one another, and the curve pairs comprise portions of maximum spacing to one another (40, 41, 60, 61) and portions of minimum spacing to one another (50, 51, 70, 71).
    Type: Grant
    Filed: November 23, 2018
    Date of Patent: December 5, 2023
    Assignee: STRATASYS, INC.
    Inventors: Dirk Achten, Thomas Buesgen, Nicolas Degiorgio, Jonas Kuenzel, Ting Liu, Maximilian Wolf
  • Patent number: 11833749
    Abstract: The present invention relates to a method for producing a treated object, comprising the steps of: applying a layer of particles to a target area; applying a liquid binder to a selected portion of the layer in accordance with a cross-section of the object, so that the particles in the selected portion are bonded; repeating the steps of applying a layer of particles and applying a binder for a plurality of layers so that the bonded portions of the adjacent layers are bonded to form an object, wherein at least a part of the particles comprises a meltable polymer. A binder which cures by cross-linking is preferably selected as the binder. The obtained object is at least partially contacted with a liquid heated to ?T or with a powder bed heated to ?T in order to obtain the treated object. T represents a temperature of ?25° C.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: December 5, 2023
    Assignee: STRATASYS, INC.
    Inventors: Dirk Achten, Thomas Buesgen, Roland Wagner, Jonas Kuenzel, Michael Kessler, Bettina Mettmann
  • Publication number: 20230220168
    Abstract: The present invention relates to a method of manufacturing a solids-incorporating polymer comprising the steps of: I) providing an aqueous polymer dispersion, the dispersion comprising crystallizing polyurethane particles having a mean particle size of ?500 nm and further comprising inorganic particles; II) storing the dispersion of step I) at a temperature of ?0° C. until a precipitate is formed; III) Isolating the precipitate of step II) and IV) removing water from the isolated precipitate of step III), thereby obtaining a water-depleted precipitate. The invention also relates to a solid particulate composition which is obtainable by the method and the use of the composition as a build material in additive manufacturing processes, as a coating, an adhesive or as a rubber.
    Type: Application
    Filed: May 12, 2021
    Publication date: July 13, 2023
    Inventors: Dirk Achten, Joerg Tillack, Ann-Christin Bijlard-Jung, Fabian Schuster
  • Publication number: 20230211530
    Abstract: The present invention relates to the use of polyisocyanate compositions and trimerization catalysts for production of coatings by reaction injection molding, to the coatings obtained by the use and to correspondingly coated workpieces.
    Type: Application
    Filed: June 25, 2021
    Publication date: July 6, 2023
    Inventors: Jan Weikard, Yvonne Reimann, Florian Golling, Frank Richter, Michael Glawe, Richard Meisenheimer, Holger Mundstock, Dirk Achten
  • Publication number: 20230151135
    Abstract: The present invention relates to the production of plastics by crosslinking of blocked polyisocyanates. The plastics obtainable are characterized in that they are substantially free of urethane groups and the crosslinking of the monomers is predominantly effected by isocyanurate groups.
    Type: Application
    Filed: October 18, 2017
    Publication date: May 18, 2023
    Inventors: Florian Golling, Saskia BEUCK, Dirk ACHTEN, Gesa BEHNKEN
  • Patent number: 11643479
    Abstract: A method for producing an article in which a layer with a radically cross-linkable resin is selectively crosslinked at least partially. This takes place according to a selected cross section of the article to be formed by means of selective application of a radical initiator. The at least partially crosslinked material is added on layer by layer to a carrier or to previous layers bonded to the carrier. A system that is suitable for carrying out the method according to the invention has a substrate, a control unit, an application unit for applying the resin to the substrate, an application unit for applying an initiator to the resin, an energy exposure unit and a contacting unit.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: May 9, 2023
    Assignee: Covestro Deutschland AG
    Inventors: Dirk Achten, Thomas Büsgen, Michael Ludewig, Roland Wagner, Christoph Tomczyk, Jörg Tillack, Arnaud Guedou
  • Patent number: 11613072
    Abstract: The present invention relates to polymerizable compositions which contain components that can be crosslinked both via isocyanurate bonds and by a radical reaction mechanism. The invention further relates to methods by way of which polymers can be produced from said compositions.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: March 28, 2023
    Assignee: Covestro Deutschland AG
    Inventors: Paul Heinz, Richard Meisenheimer, Jörg Tillack, Dirk Achten, Thomas Büsgen, Michael Ludewig, Christoph Tomczyk, Roland Wagner, Alisa Kayser
  • Patent number: 11597795
    Abstract: The present invention relates to the use of tertiary amines as catalysts for the cross-linking of isocyanate groups which are aliphatically and/or cyclo-aliphatically bonded. The catalysts according to the invention have the particular advantage that they are thermally latent.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: March 7, 2023
    Assignee: Covestro Intellectual Property GmbH & Co. KG
    Inventors: Richard Meisenheimer, Paul Heinz, Dirk Achten, Frank-Stefan Stern
  • Publication number: 20230060682
    Abstract: A method for producing an object from a filamentary building material in an additive fused deposition modelling process, comprising the steps of: providing the building material; transporting the building material into a printhead at a feed rate for the building material, wherein the building material is transported between a driven drive wheel and a second wheel; melting the building material by means of a heating device in the printhead; discharging the molten building material to a discharge location, corresponding to a selected cross section of the object to be produced, at a discharge rate through an orifice of the printhead, with relative movement of the printhead in relation to the discharge location at a predetermined speed to movement along a predetermined path, wherein the path has at each location a curvature that can assume a positive value, zero or a negative value; wherein a control unit controls at least the drive of the drive wheel, the heating device in the printhead and the movement of the p
    Type: Application
    Filed: September 13, 2022
    Publication date: March 2, 2023
    Inventors: Dirk Achten, Thomas Buesgen, Levent Akbas, Roland Wagner, Nicolas Degiorgio, Jonas Kuenzel
  • Patent number: 11590692
    Abstract: A process for producing an object from a precursor comprises the steps of: I) depositing a free-radically crosslinked resin atop a carrier to obtain a ply of a construction material joined to the carrier which corresponds to a first selected cross section of the precursor; II) depositing a free-radically crosslinked resin atop a previously applied ply of the construction material to obtain a further ply of the construction material which corresponds to a further selected cross section of the precursor and which is joined to the previously applied ply; III) repeating step II) until the precursor is formed; IV) treating the precursor obtained after step III) under conditions sufficient to at least partially trimerize to isocyanurate groups NCO groups present in the free-radically crosslinked resin of the obtained precursor to obtain the object.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: February 28, 2023
    Assignee: Covestro Deutschland AG
    Inventors: Dirk Achten, Thomas Büsgen, Jörg Tillack, Michael Ludewig, Christoph Tomczyk, Roland Wagner
  • Patent number: 11555088
    Abstract: The invention relates to a method for producing an object from a construction material, the construction material comprising radically crosslinkable groups, NCO groups and groups having Zerewitinoff active H atoms, and the object being a three-dimensional object and/or a layer. During and/or after the production of the object, the construction material is heated to a temperature of >50° C., and the construction material comprises one or more cyclic tin compounds of formula F-I, F-II and/or F-III.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: January 17, 2023
    Assignee: Covestro Deutschland AG
    Inventors: Dirk Achten, Thomas Büsgen, Christoph Tomczyk, Jan Weikard, Frank Richter, Roland Wagner
  • Publication number: 20230001691
    Abstract: The invention relates to a 2K coating formulation that is printed using a valve jet printer.
    Type: Application
    Filed: November 10, 2020
    Publication date: January 5, 2023
    Inventors: Dirk Achten, Ann-Christin Bijlard-Jung, Fabian Schuster, Tanja Hebestreit, Joerg Tillack
  • Publication number: 20220411569
    Abstract: A method for producing an object comprises the step of producing the object by means of an additive manufacturing process from a construction material. The construction material comprises a first polyurethane polymer which has: a weight percentage ratio of O to N of ?2 to ?2.5, determined by elementary analysis; a weight percentage ratio of N to C of ?0.1 to ?0.25, determined by elementary analysis; a full-width at half maximum of the melting peak of ?20 K, determined by dynamic differential scanning calorimetry DSC (2nd heating at heating rate 20 k/min); and a difference between the melting temperature and the recrystallisation temperature of ?5 K and ?100 K, determined by dynamic differential scanning calorimetry DSC (2nd heating) at a heating and cooling rate of 20 K/min.
    Type: Application
    Filed: December 14, 2020
    Publication date: December 29, 2022
    Inventors: Dirk ACHTEN, Thomas BUESGEN, Mathias MATNER, Bettina METTMANN, Bernd GARSKA, Michael KESSLER, Peter REICHERT, Roland WAGNER, Thomas PRENVEILLE
  • Publication number: 20220411683
    Abstract: The invention relates to the use of an aqueous dispersion containing at least one polyurethane-polyurea polymer formed from (a) at least one difunctional polyester polyol having a number-average molecular weight of 400 to 5000 g/mol, (b) at least one difunctional polyol component having a number-average molecular weight of 762 to 399 g/mol, c) at least one diisocyanate and (d) at least one chain extender optionally having at least one ionic group, for the bonding of at least two substrates by application of the aqueous dispersion to at least one of the substrates to be bonded, subsequent drying of the dispersion present on the at least one substrate in order to obtain at least one adhesive layer, and contacting of the at least one adhesive layer with a further substrate or with an adhesive layer present on a further substrate at a pressure of from 0.1 to 5 bar(a) and a temperature of less than 40° C.
    Type: Application
    Filed: December 3, 2020
    Publication date: December 29, 2022
    Inventors: Dirk ACHTEN, Wolfgang ARNDT, Robert LIBERATI, Christoph THIEBES, Peter KUEKER, Harald KRAUS
  • Patent number: 11530290
    Abstract: The invention relates to a process for producing a composite polyisocyanurate material, comprising the following steps: a) providing a polyisocyanate composition A) which comprises oligomeric polyisocyanates and is low in monomeric diisocyanates, “low in monomeric diisocyanates” meaning that the polyisocyanate composition A) has a content of monomeric diisocyanates of not more than 20% by weight, and b) catalytically trimerizing the polyisocyanate composition A) in the presence of at least one fibrous filler B) and of a trimerization catalyst C) to give the composite polyisocyanurate material, where the trimerization catalyst C) comprises at least one metal salt and/or quaternary ammonium salt. The invention further relates to composite polyisocyanurate materials obtainable by the process according to the invention and to the use thereof for production of a component, and to components consisting of or comprising a composite polyisocyanurate material according to the invention.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: December 20, 2022
    Assignee: Covestro Deutschland AG
    Inventors: Heiko Hocke, Mathias Matner, Dirk Achten, Paul Heinz
  • Publication number: 20220396655
    Abstract: The invention relates to a multi-stage process for the continuous preparation of thermoplastic polyurethanes by reacting one or more aliphatic, cycloaliphatic and/or araliphatic diols with one or more aliphatic, cycloaliphatic and/or araliphatic diisocyanates, wherein the total reaction enthalpy is ??500 kJ/kg over all the process stages at a molar ratio of diol to diisocyanate of 1.0:1.0.
    Type: Application
    Filed: December 10, 2020
    Publication date: December 15, 2022
    Inventors: Mathias MATNER, Thomas KOENIG, Bernd GARSKA, Stephan SCHUBERT, Dirk ACHTEN, Rainer BELLINGHAUSEN, Claudia HOUBEN