Patents by Inventor Dorota Greszta-Franz

Dorota Greszta-Franz 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).

  • Publication number: 20220144998
    Abstract: The present invention relates to a process for producing polyaspartic ester compositions by reacting cyclic ethers bearing primary amino and/or primary aminoalkyl groups with fumaric and/or maleic esters, to the polyaspartic ester compositions thus obtainable, and to the use thereof in two-component coating compositions.
    Type: Application
    Filed: March 19, 2020
    Publication date: May 12, 2022
    Inventors: Irene Cristina Latorre Martinez, Dorota Greszta-Franz, Raul Pires, Nusret Yuva, Magdalena Fluegel, Andreas Hecking, Florian Golling
  • Publication number: 20220145121
    Abstract: The present invention relates to two-component topcoat systems comprising polyaspartic esters that contain only small amounts of dialkyl fumarates, to a process for the production thereof and for the use thereof in the production of coatings, in particular for corrosion protection, and to the use in the field of general industrial painting or in the field of ACE (agriculture, construction and earth-moving equipment) and to substrates coated therewith.
    Type: Application
    Filed: February 20, 2020
    Publication date: May 12, 2022
    Inventors: Dorota Greszta-Franz, Jan Weikard, Matthias Wintermantel, Robert Reyer, Thomas Schuettler
  • Publication number: 20220098437
    Abstract: The present invention relates to two-component clear-coat systems comprising polyaspartic esters having primary amino groups and small amounts of dialkyl fumarates, to a process for the production thereof, and to the use thereof in the production of coatings for vehicle repair applications and to substrates coated therewith.
    Type: Application
    Filed: February 20, 2020
    Publication date: March 31, 2022
    Inventors: Dorota Greszta-Franz, Jan Weikard, Holger Mundstock
  • Patent number: 11230522
    Abstract: The present invention relates to polyaspartic acid ester compositions which contain polyaspartic acid esters with primary amino groups and small amounts of fumaric acid dialkyl esters, to a method for preparing same and the use thereof as a reactive component for polyisocyanates in two-component polyurethane systems.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: January 25, 2022
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Dorota Greszta-Franz, Jan Weikard, Matthias Wintermantel, Robert Maleika, Thomas Klimmasch, Thomas Schuettler
  • Publication number: 20210277277
    Abstract: The present invention relates to a coating composition, a coating method and use of the composition, and a product coated with the coating composition. The coating composition comprises: (a) an isocyanate-reactive component comprising: (a1) at least one polyaspartic ester, and (a2) optionally a polyetheraspartic ester; (b) an isocyanate component comprising: (b1) at least one isocyanate prepolymer having an isocyanate group equivalent of 300 to 1100, and (b2) at least one isocyanate oligomer containing not less than two isocyanate groups, the weight ratio of the isocyanate prepolymer (b1) to the isocyanate oligomer (b2) being from 1:4 to 4:1; (c) a catalyst; and (d) optionally an additive; wherein the coating composition has a molar ratio of isocyanate groups to isocyanate-reactive groups of 1.5:1 to 8:1. The coating composition provided by the present invention has a long pot life, and the resulting coating has the advantages of fast drying and high hardness.
    Type: Application
    Filed: July 17, 2019
    Publication date: September 9, 2021
    Inventors: Dorota Greszta-Franz, Jianping Shen, Junchao Zheng, Yifeng Xu, Ling Yang, Jinqi Li, Hongchao Li, Hao Liu
  • Patent number: 11091584
    Abstract: The present invention relates to a polyisocyanate composition comprising a formation component having isocyanate groups, the isocyanate groups having been reacted to an extent of ?98% with at least one CH-acidic compound, characterized in that the formation component consists to an extent of ?51% by weight of at least one polyisocyanate based on pentamethylene 1,5-diisocyanate having a content of isocyanurate trimer of ?60 area %, based on the total weight of the polyisocyanates based on pentamethylene 1,5-diisocyanate, and the remaining proportion up to 100% by weight of the total amount of polyisocyanates present in the formation component consists of at least one aliphatic or cycloaliphatic polyisocyanate. The present invention further provides a one-component system comprising the polyisocyanate composition, a process for producing a coating on a substrate, and the coatings obtainable from the one-component system.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: August 17, 2021
    Assignee: Covestro Deutschland AG
    Inventors: Andreas Hecking, Florian Johannes Stempfle, Christoph Eggert, Michael Grahl, Dorota Greszta-Franz
  • Patent number: 11008416
    Abstract: The present invention relates to aqueous, curable composition, comprising or consisting of A) at least one uretdione prepolymer, which comprises at least one uretdione group, and which is obtainable by reacting A1) at least one uretdione polyisocyanate having an isocyanate functionality of at least 2.0, whereby said uretdione polyisocyanate is obtained from at least one aliphatic polyisocyanate, with A2) at least one compound comprising at least one Zerewitinoff-active group, and A3) at least one reactant, which comprises at least one Zerewitinoff-active group and being different from A2 or which is H2O, preferably in the presence of at least one catalyst, to obtain the uretdione prepolymer, wherein the prepolymer has an acid number of at most 4 mg KOH/g, preferably determined according to DIN EN ISO 2114:2002-06 as 37 wt. % aqueous dispersion; and B) optionally at least one compound, which comprises at least one Zerewitinoff-active group; and C) at least one azolate-compound.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: May 18, 2021
    Assignees: Covestro LLC, Covestro Deutschland AG
    Inventors: Sebastian Dörr, Saskia Beuck, Hans-Josef Laas, Dorota Greszta-Franz, Nusret Yuva, Ralph-Georg Born, Alan Ekin
  • 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
  • Publication number: 20210024680
    Abstract: The invention relates to aqueous uretdione group-containing compositions comprising or consisting of (A) at least one uretdione group-containing curing agent based on aliphatic, cycloaliphatic, araliphatic, and/or aromatic polyisocyanates which do not contain chemically bonded hydrophilating groups; (B) at least one hydroxy group-containing polyol which contains at least one chemically bonded carboxylic acid group; (C) optionally solvents; and (D) optionally auxiliary agents and additives; wherein the quantity ratio of the components (A) and (B) is measured such that the molar ratio of the NCO groups of the curing agent (A), said groups being provided in the form of uretdione, to the NCO reactive groups of the polyol (B) equals 3.0:0.5 to 0.5:3.0, and A and B are provided as a physical mixture.
    Type: Application
    Filed: March 21, 2019
    Publication date: January 28, 2021
    Inventors: Dorota Greszta-Franz, Saskia Beuck, Sebastian Doerr, Hans-Josef Laas, Nusret Yuva, Heinz-Dietmar Gewiss
  • Publication number: 20210024679
    Abstract: The present invention relates to a catalyst system comprising: A) at least one compound selected from azoles, oxazoles, thiazoles, benzotriazole, benzimidazole, benzoxazole and salts thereof; B) at least one acid catcher, which contains at least one epoxy group; and C) at least one catalyst containing an N,N,N?-trisubstituted amidine structure with an amidine group content of from 12.0 to 47.0 wt %, calculated as CN2 with molecular weight=40. The invention also relates to a kit which comprises the catalyst system of the present invention and an aqueous uretdione dispersion having an acid number of from 1 to 100 KOH/g and additionally at least one carboxyl group. The invention further relates to a method for producing a polyurethane layer using the catalyst system of the present invention and said uretdione dispersion, and to the obtained polyurethane layer, and to the use of the catalyst system for curing aqueous acidic uretdione dispersions and/or for the production of paints or coatings.
    Type: Application
    Filed: March 21, 2019
    Publication date: January 28, 2021
    Inventors: Saskia Beuck, Sebastian Doerr, Hans-Josef Laas, Dorota Greszta-Franz, Nusret Yuva, Ralph-Georg Born
  • Publication number: 20210017323
    Abstract: The invention relates to aqueous uretdione group-containing compositions comprising or consisting of (A) at least one uretdione group-containing curing agent based on aliphatic, cycloaliphatic, aliphatic and/or aromatic polyisocyanates which do not contain chemically bonded hydrophilating groups; (B) at least one polyacrylate copolymer; (C) optionally solvents; and (D) optionally auxiliary agents and additives; wherein the quantity ratio of the components (A) and (B) is measured such that the molar ratio of the NCO groups of the curing agent (A), said groups being provided in the form of uretdione, to the NCO reactive groups of the polyacrylate copolymer (B) equals 3.0:0.5 to 0.5:3.0, and A and B are provided as a physical mixture.
    Type: Application
    Filed: March 21, 2019
    Publication date: January 21, 2021
    Inventors: Dorota Greszta-Franz, Saskia Beuck, Hans-Josef Laas, Nusret Yuva, Heinz-Dietmar Gewiss
  • Publication number: 20210017322
    Abstract: The present invention relates to a specific uretdione prepolymer, and an aqueous curable composition based on the specific uretdione prepolymer. Furthermore, it pertains to a process for curing said aqueous curable composition, the cured article obtained by this process and additionally to the use of said aqueous composition for coatings, adhesives and/or sealants.
    Type: Application
    Filed: March 21, 2019
    Publication date: January 21, 2021
    Inventors: Saskia Beuck, Sebastian Doerr, Hans-Josef Laas, Dorota Greszta-Franz, Nusret Yuva
  • Publication number: 20200223787
    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: Application
    Filed: September 14, 2018
    Publication date: July 16, 2020
    Inventors: Dorota Greszta-Franz, Christian Drumm, Jan Morbach, Reiner Witkowski
  • Publication number: 20200216383
    Abstract: The present invention relates to polyaspartic acid ester compositions which contain polyaspartic acid esters with primary amino groups and small amounts of fumaric acid dialkyl esters, to a method for preparing same and the use thereof as a reactive component for polyisocyanates in two-component polyurethane systems.
    Type: Application
    Filed: September 14, 2018
    Publication date: July 9, 2020
    Inventors: Dorota Greszta-Franz, Jan Weikard, Matthias Wintermantel, Robert Maleika, Thomas Klimmasch, Thomas Schuettler
  • Publication number: 20190292305
    Abstract: The present invention provides a composition comprising a polyuretdione resin; and a blocked amine; and optionally, an additive package (e.g. flow control, wetting agent) and a solvent. The present invention further provides a method of forming a biuret comprising the steps of: unblocking a blocked amine in the presence of moisture; and crosslinking the unblocked amine with a polyuretdione resin. The compositions of the present invention are particularly applicable in or as coatings, adhesives, castings, composites, and sealants with good performance and extended pot-life.
    Type: Application
    Filed: March 23, 2018
    Publication date: September 26, 2019
    Inventors: Alan Ekin, David P. Zielinski, Dorota Greszta-Franz, Florian Johannes Stempfle
  • Publication number: 20190292299
    Abstract: The present invention relates to aqueous, curable composition, comprising or consisting of A) at least one uretdione prepolymer, which comprises at least one uretdione group, and which is obtainable by reacting A1) at least one uretdione polyisocyanate having an isocyanate functionality of at least 2.0, whereby said uretdione polyisocyanate is obtained from at least one aliphatic polyisocyanate, with A2) at least one compound comprising at least one Zerewitinoff-active group, and A3) at least one reactant, which comprises at least one Zerewitinoff-active group and being different from A2 or which is H2O, preferably in the presence of at least one catalyst, to obtain the uretdione prepolymer, wherein the prepolymer has an acid number of at most 4 mg KOH/g, preferably determined according to DIN EN ISO 2114:2002-06 as 37 wt. % aqueous dispersion; and B) optionally at least one compound, which comprises at least one Zerewitinoff-active group; and C) at least one azolate-compound.
    Type: Application
    Filed: March 23, 2018
    Publication date: September 26, 2019
    Inventors: Sebastian Dörr, Saskia Beuck, Hans-Josef Laas, Dorota Greszta-Franz, Nusret Yuva, Ralph-Georg Born, Alan Ekin
  • Publication number: 20180208709
    Abstract: The present invention relates to a polyisocyanate composition comprising a formation component having isocyanate groups, the isocyanate groups having been reacted to an extent of ?98% with at least one CH-acidic compound, characterized in that the formation component consists to an extent of ?51% by weight of at least one polyisocyanate based on pentamethylene 1,5-diisocyanate having a content of isocyanurate trimer of ?60 area %, based on the total weight of the polyisocyanates based on pentamethylene 1,5-diisocyanate, and the remaining proportion up to 100% by weight of the total amount of polyisocyanates present in the formation component consists of at least one aliphatic or cycloaliphatic polyisocyanate. The present invention further provides a one-component system comprising the polyisocyanate composition, a process for producing a coating on a substrate, and the coatings obtainable from the one-component system.
    Type: Application
    Filed: July 20, 2016
    Publication date: July 26, 2018
    Inventors: Andreas Hecking, Florian Johannes Stempfle, Christoph Eggert, Michael Grahl, Dorota Greszta-Franz
  • Publication number: 20180009931
    Abstract: A composition comprising an isocyanate component A) comprising at least one cycloaliphatic or araliphatic diisocyanate, a polyol component B) comprising at least one polyol having an OH number of 80 to 1000 mg KOH/g, an additive component C) comprising at least one internal demoulding agent, and a catalyst component D) comprising at least one inorganic metal complex as thermally latent catalyst, characterized in that the thermally latent catalyst has a quotient of reaction rates between catalysed reaction and uncatalysed reaction at 30° C. of =5.0 and at 60° C. of =1.1. The present invention further provides a process for producing an elastomer and for the use of the composition for production of transparent shaped bodies.
    Type: Application
    Filed: January 13, 2016
    Publication date: January 11, 2018
    Inventors: Robert MALEIKA, Frank-Stefan STERN, Frank RICHTER, Dorota GRESZTA-FRANZ, Hans-Josef LAAS
  • Patent number: 9733394
    Abstract: The present invention relates to a composition comprising 10 to less than 50 wt.-% of at least one oligomeric polyisocyanate a-1) based on hexamethylene diisocyanate and more than 50 to 90 wt.-% of at least one polyisocyanate a-2) based on isophorone diisocyanate, comprising monomeric isophorone diisocyanate and at least one oligomeric isophorone diisocyanate, and an isocyanate-reactive component selected from the group consisting of polyester polyol, polyether polyol and mixtures thereof. It has been shown that the above mentioned mixture of the specific isocyanate group containing components improves the thermal and mechanical properties of a cured composition. Thus prepared molded articles are particularly suitable for the preparation of spectacle lenses, inter alia due to these properties.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: August 15, 2017
    Assignee: Covestro Deutschland AG
    Inventors: Dorota Greszta-Franz, Hans-Josef Laas, Hartmut Nefzger, Jens Krause
  • Patent number: 9718916
    Abstract: The present invention relates to a composition comprising 10 to 50 wt.-% of at least one polyisocyanate a-1) based on hexamethylene diisocyanate, comprising at least one oligomeric polyisocyanate based on hexamethylene diisocyanate and optionally monomeric hexamethylene diisocyanate and 50 to 90 wt.-% of at least one polyisocyanate a-2) based on isophorone diisocyanate, comprising at least one oligomeric polyisocyanate based on isophorone diisocyanate and optionally monomeric isophorone diisocyanate, with the proviso that at least one of the components a-1) and a-2) additionally comprises monomeric isocyanate of the named kind, as well as at least one sulfur-containing component. It has been shown that the above mentioned mixture of the specific isocyanate group containing components improves the thermal and mechanical properties of a cured composition. Thus prepared molded articles are particularly suitable for the preparation of spectacle lenses, inter alia due to these properties.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: August 1, 2017
    Assignee: Covestro Deutschland AG
    Inventors: Dorota Greszta-Franz, Jens Krause, Hans-Josef Laas