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).

  • 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: 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: 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: 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
  • Patent number: 9657206
    Abstract: The present invention relates to adhesive formulations based on uretdione-group-comprising polyaddition compounds that are free of isocyanate groups and monomeric polyisocyanates, and to the use thereof for the production of adhesive bonds between substrates, in particular for the production of flexible film composites.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: May 23, 2017
    Assignee: Covestro Deutschland AG
    Inventors: Dorota Greszta-Franz, Berta Vega Sanchez, Beate Baumbach, Hans-Josef Laas, Mathias Matner
  • Publication number: 20170121447
    Abstract: The invention relates to polyisocyanates that have aliphatically, cycloaliphatically, araliphatically and/or aromatically bonded isocyanate groups and contain thioallophanate structures of formula (I), to a method for producing them, and to their use as starting components in the production of polyurethane plastics.
    Type: Application
    Filed: June 9, 2015
    Publication date: May 4, 2017
    Inventors: Hans-Josef Laas, Dorota Greszta-Franz
  • Patent number: 9556304
    Abstract: The invention relates to a method for producing polyurethanes containing cyclic carbonate structures by reacting at least A) a composition containing a) one or more compounds of the general formula (I), said compounds containing isocyanate groups and cyclic carbonate structures, and b) <=1 wt.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: January 31, 2017
    Assignee: Covestro Deutschland AG
    Inventors: Hans-Josef Laas, Dorota Greszta-Franz, Berta Vega Sanchez
  • Patent number: 9458318
    Abstract: The invention relates to novel solvent-free, monomer-depleted polyisocyanate mixtures, and to the use thereof for producing light-resistant and weather-resistant polyurethane bodies with high optical refraction and low optical dispersion.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: October 4, 2016
    Assignee: Covestro Deutschland AG
    Inventors: Dorota Greszta-Franz, Hans-Josef Laas, Reinhard Halpaap, Dieter Mager, Hans-Ulrich Meier-Westhues
  • Patent number: 9458282
    Abstract: The invention relates to the use of polyurethane sealing compounds for the production of light-fast compact or foamed polyurethane bodies or polyurethane urea bodies which have excellent mechanical and optical properties and especially a very high thermostability.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: October 4, 2016
    Assignee: Covestro Deutchland AG
    Inventors: Dorota Greszta-Franz, Hans-Josef Laas, Jens Krause, Dieter Mager, Christian Wamprecht
  • Patent number: 9353209
    Abstract: The present invention relates to a composition comprising 10 to 50 wt.-% of at least one polyisocyanate a-1) based on hexamethylene diisocyanat, 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: April 22, 2013
    Date of Patent: May 31, 2016
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Dorota Greszta-Franz, Jens Krause, Hans-Josef Laas