Patents Assigned to Covestro Deutschland AG
  • Patent number: 10982039
    Abstract: The invention relates to a method for producing PUR/PIR rigid foam materials, having the steps of reacting at least one polyester polyol (a), which can be obtained by reacting a. I.) at least one cyclic carboxylic acid anhydride; a.2.) at least one low-molecular dial with a molecular mass of 62 to 450 Da; and a.3.) at least one alkylene oxide; by esterifying the components a.I.) and a.2.) and subsequently oxalkylating the resulting carboxylic acid half-ester using component a.3.); wherein at least the oxalkylation is carried out using a.4.) at least one amine catalyst in which (the) nitrogen atom(s) is/are part of an aromatic ring system, with (b) at least one polyisocyanate-containing component, (c) at least one propellant, (d) at least one or more catalysts, (e) optionally at one flameproofing agent and/or other auxiliary agents, and (f) optionally at least one additional compound with at least two groups which are reactive towards isocyanates and which differ from polyester polyol (a).
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: April 20, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Hartmut Nefzger, Torsten Hagen, Klaus Lorenz, Rene Abels
  • Publication number: 20210108021
    Abstract: The present invention relates to polyurethane based solid surface materials with improved dimensional stability which can be made using conventional inorganic fillers without pre-treatment of the fillers.
    Type: Application
    Filed: March 21, 2018
    Publication date: April 15, 2021
    Applicant: Covestro Deutschland AG
    Inventors: Ann-Christin BIJLARD, Lukas BREUERS, Joan Miguel GARCIA MARTINEZ
  • Patent number: 10978712
    Abstract: The invention describes a process for the manufacture of a gas diffusion electrode involving preparing a powder mixture containing at least a catalyst and a binder, applying the powder mixture to an electrically conducting support, and pressing the powder mixture with the electrically conducting support.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: April 13, 2021
    Assignee: Covestro Deutschland AG
    Inventor: Andreas Bulan
  • Patent number: 10975020
    Abstract: A process for quenching, in a quenching zone, a gaseous reaction mixture that includes a diisocyanate, phosgene and hydrogen chloride that is obtained in a reaction zone upstream of the quenching zone by phosgenation of a diamine in the gas phase. The process includes injecting a deposit preventing liquid in a deposit preventing zone located between the reaction zone and the quenching zone by passing the deposit preventing liquid through spray nozzles for the deposit preventing liquid at the entrance to the deposit preventing zone. Each spray nozzle for the deposit preventing liquid sprays the deposit preventing liquid (i) onto a wall segment of the deposit preventing zone that is adjacent to said spray nozzle for the deposit preventing liquid to produce a film of the deposit preventing liquid flowing along the wall, and/or (ii) to areas in a cross-sectional plane of the deposit preventing zone before the entrance to the quenching zone.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: April 13, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Yuguo Gai, Zhangyong Ming, Qiang Wei, Joachim Zechlin, Thomas Bludowsky, Wolfgang Taube, Volker Michele
  • Patent number: 10975212
    Abstract: The present invention provides a polyol composition for preparing a viscoelastic and reticulated polyurethane foam, comprising a first polyether polyol b1), a second polyether polyol b2), a third polyether polyol b3), and a surfactant b6). The present invention also provides a viscoelastic and reticulated polyurethane foam prepared from said polyol composition, wherein the polyurethane foam has a ball rebound rate of less than 15% determined according to GB/T6670-2008.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: April 13, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Liqiang Li, Qingyun Wang, Yongxing Lin, Zhong Cao, Kehan Xiong
  • Patent number: 10974498
    Abstract: A process for manufacturing an article, comprising the step of manufacturing the article via an additive fabrication process from a structural material, is notable in that the structural material comprises a polymer selected from the following group: (co)polycarbonates, polyesters, polyestercarbonates, polyformals, polyamides, polyethers, polyvinyl chloride, polymethyl (meth)acrylate, polystyrene or a combination of at least two thereof and an additive absorbing infrared radiation. The additive absorbing infrared radiation is selected for its chemical structure and its concentration in the structural material such that it reduces transmission by the structural material of light in the wavelength range between 600 nm and 1700 nm, determined on a sample 100 ?m thick, by ?2.5 percentage points relative to a structural material sample with a thickness of 100 ?m that does not contain the additive absorbing infrared radiation.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: April 13, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Dirk Achten, Thomas Büsgen, Rolf Wehrmann, Helmut Werner Heuer
  • Patent number: 10968466
    Abstract: The present invention relates to a process for preparing aminobenzoic acid or an aminobenzoic acid conversion product, comprising the steps of: (I) providing an aqueous solution of aminobenzoic acid using a fermentation process; (II) adsorbing aminobenzoic acid; (III) desorbing aminobenzoic acid at a pH in the range from ?0.8 to 3.0, preferably ?0.5 to 3.0, more preferably 0.1 to 3.0, very preferably 0.5 to 2.5, very exceptionally preferably 1.0 to 2.0; (IV) obtaining the aminobenzoic acid from the desorbate obtained in step (III); (V) optionally further converting the aminobenzoic acid obtained in step (IV) to an aminobenzoic acid conversion product.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: April 6, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Gernot Jäger, Ivonne Görtz, Giulio Lolli, Amgad Salah Moussa, Thomas Hamedinger
  • Patent number: 10968165
    Abstract: The present invention relates to a method for purifying polyaspartic acid ester compositions and to the provision of polyaspartic acid ester compositions that contain 0.01 to <2% by weight fumaric acid dialkyl esters.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: April 6, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Dorota Greszta-Franz, Christian Drumm, Jan Morbach, Reiner Witkowski
  • Patent number: 10961346
    Abstract: The invention relates to a two-stage method for the preparation of polyoxyalkylene polyols having low equivalent molar masses, in which the method requires no reprocessing. The invention is characterized in that, in the first stage, a polyoxyalkylene polyol precursor is provided, which contains the salts of a strong Bronsted acid, and in that, in a second stage, the polyoxyalkylene polyol precursor is further reacted with alkylene oxides under DMC catalysis.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: March 30, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Klaus Lorenz, Ingo Danek
  • Patent number: 10954381
    Abstract: The present invention is to provide a composition which can easily form a polyurethane resin which exerts particularly excellent damping properties in an operating temperature range. A resin composition for damping materials, including a polyol-containing component (A) and a polyisocyanate (B) is provided. The polyol-containing component (A) contains a castor oil. When the composition is cured, the peak on its Tan ? curve is 0.7 or more and the temperature for the peak is in a range of ?10° C. to 100° C.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: March 23, 2021
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Shinji Nishikawa, Shinichiro Sado
  • Patent number: 10940647
    Abstract: The present invention provides a continuous method for producing a fiber-reinforced semi-finished plate. The present invention also provides a device for carrying out the continuous method for producing a fiber-reinforced semi-finished plate. The present invention provides the fiber-reinforced semi-finished plate.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: March 9, 2021
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Mattias Knaupp, Thomas Grimm, Henning Börger
  • Patent number: 10941238
    Abstract: The present invention relates to a viscoelastic element comprising a polyurethane foam, wherein the polyurethane foam can be obtained by reacting at least one isocyanate-functional prepolymer (VI) in the presence of a special polyurethane urea dispersion (V2), wherein the reaction of the prepolymer (VI) takes place in the presence of the polyurethane urea (V2) with a medium containing isocyanate-reactive groups. The invention also relates to a method for producing the viscoelastic element and to the use thereof.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: March 9, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Marc-Stephan Weiser, Sascha Plug, Sebastian Doerr, Jeff Motley
  • Patent number: 10934386
    Abstract: The present invention relates to aqueous polyurethane dispersions comprising pentamethylene diisocyanate and to coatings obtainable therefrom. Said coatings, given a high density of urethane and urea groups, are softer than coatings that are obtained with polyurethane dispersions comprising other aliphatic diisocyanates, for example hexamethylene diisocyanate.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: March 2, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Hans Georg Grablowitz, Thomas Feller
  • Patent number: 10934415
    Abstract: The invention relates to glass-fibre- and/or carbon-fibre-reinforced polycarbonate compositions having improved flowability coupled with good heat resistance and to articles of manufacture produced from said compositions, in particular those from the thin wall applications sector, for example housing parts for ultrabooks or smartphones. The compositions comprise at least one saturated or unsaturated monocarboxylic acid having a chain length of 6 to 30 carbon atoms and at least one ester of these monocarboxylic acids based on glycerol and/or diglycerol.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: March 2, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Rolf Wehrmann, Helmut Werner Heuer, Anke Boumans
  • Patent number: 10934429
    Abstract: Compositions are provided comprising A) at least one polymer selected from the group consisting of aromatic polycarbonate and aromatic polyester carbonate, B) at least one mixture comprising at least one butadiene-based graft polymer prepared by emulsion, suspension or solution polymerization and at least one polybutadiene-free vinyl (co)polymer, and C) at least one polymer additive, where the polybutadiene content based on the sum total of the parts by weight of components A and B is 10% to 20% by weight, and where the total content of butadiene-free vinyl (co)polymer from component B based on the sum total of the parts by weight of components A and B is 12% to 23% by weight. Composite components formed from these compositions and a polyurethane layer, which are notable for improved adhesion between the two layers, and a process for producing the composite components are also provided.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: March 2, 2021
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Ralf Hufen, Thomas Eckel, Sven Hobeika, Timo Kuhlmann, Johannes Scherer
  • Publication number: 20210054677
    Abstract: A construction element A comprises a) at least one pane of glass B; and b) a frame C made of a non-coated thermoset polymeric composite material with a polymer matrix which is based on at least 50 wt.-% of an aliphatic polyisocyanate; and c) optionally at least one sealant D that connects the pane of glass B with frame C. It is characterized by an excellent long term weathering resistance, high durability and low maintenance efforts.
    Type: Application
    Filed: March 5, 2018
    Publication date: February 25, 2021
    Applicant: Covestro Deutschland AG
    Inventors: Ruqi CHEN, Heiko HOCKE, Dongbo ZHAO, Yan DENG, Min TANG
  • Patent number: 10927274
    Abstract: The present invention relates to an article comprising expanded thermoplastic polyurethane as a substrate and a specific polyurethane urea coating on said substrate, as well as footwear, a process for producing the article and a use of a polyurethane urea dispersion/solution. It has been found that a polyurethane urea coating comprising polycarbonate structural units strongly binds to expanded TPU substrates and maintains the intrinsic properties of the expanded TPU.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: February 23, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Rolf Irnich, Thomas Michaelis
  • Patent number: 10927227
    Abstract: The invention relates to flame-retardant flexible polyurethane foams with phosphazene and to methods for producing PUR flexible foams by reacting a component A containing: A1, an isocyanate-reactive component, A2, a propellant containing water, A3, optionally auxiliary agents and additives, and A4, a flame retardant, with B, an isocyanate component. The invention is characterized in that the flame retardant A4 contains a phosphazene according to the formula (I): [PmNmXk] (I), where X independently of one another represents O-aryl or NR-aryl, at least one aryl group is substituted, X can represent a bridge, R is selected from the group of H, C1-C4 alkyl, and aryl, and m represents a number from 1 to 5, particularly preferably 3 or 4, k depends on m and represents a number from 0 to 2m, and the phosphazene does not have any groups which are reactive towards isocyanates.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: February 23, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Rolf Albach, Petra Venner
  • Patent number: 10926459
    Abstract: A process for manufacturing an article comprises the steps of: applying a layer that consists of particles to a target area; allowing, in a chamber, energy to act on a selected portion of the layer, according to a cross-section of the article, so that the particles in the selected portion are bonded, and repeating the steps of applying and allowing energy to act for a plurality of layers so that the bonded portions of the adjacent layers are bonded to form the article, at least part of the particles comprising a fusible polymer. The fusible polymer has a fusion range (DSC, differential scanning calorimetry; 2nd heating at a heating rate of 5 K/min.) of ?20° C. to ?100° C. The fusible polymer further has a complex viscosity \?*\ (determined by viscosity measurement in the melt using a plate-plate oscillating viscometer according to ISO 6721-10 at 100° C. and a shear rate of 1/s) of ?10 Pas to ?1000000 Pas. Finally, the temperature inside the chamber is ?50° C.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: February 23, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Dirk Achten, Thomas Büsgen, Dirk Dijkstra, Nicolas Degiorgio, Wolfgang Arndt, Levent Akbas, Roland Wagner, Peter Reichert, Jörg Büchner
  • Patent number: 10926481
    Abstract: Method and device for connecting two webs (1), reinforced with unidirectionally oriented continuous fibres, by ultrasonic welding, wherein the fibres are embedded in a matrix of polycarbonate and the webs have abutting edges that are substantially square and substantially flat, characterized by the following steps:—arranging the webs abutting one another in the region of the abutting edges in a welding device between a sonotrode (2) and an anvil (3),—welding the webs by means of ultrasound, wherein the sonotrode and the anvil exert pressure on the webs to be welded in the melting region between the webs and perpendicularly to the abutting edges of the webs,—removing the welded-together webs (4) from the welding device.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: February 23, 2021
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Matthias Knaupp, Thomas Grimm, Henning Börger