Patents by Inventor Stefan Groth

Stefan Groth 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: 10752728
    Abstract: The invention relates to a polyisocyanate which is based on tolylene 2,4-diisocyanate, tolylene 2,6-diisocyanate or a mixture of tolylene 2,4- and 2,6-diisocyanate and has isocyanurate groups, wherein the polyisocyanate has a) a weight average molecular weight of from ?350 to ?800 g/mol, determined by means of gel permeation chromatography using a polystyrene standard and tetrahydrofuran as eluent in accordance with DIN 55672-1:2016-03, b) a polydispersity D of from >1 to ?1.5, where the polydispersity D is the ratio of weight average and number average molecular weight of the polyisocyanate and the weight average and number average molecular weight are in each case determined by means of gel permeation chromatography using a polystyrene standard and tetrahydrofuran as eluent in accordance with DIN 55672-1:2016-03, and c) a content of monomeric tolylene diisocyanate of ?1% by weight, based on the total weight of the polyisocyanate.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: August 25, 2020
    Assignee: Covestro Deutschland AG
    Inventors: Christoph Irle, Stefan Groth, Ruiwen Wu, Antonio Midolo, Robert Maleika, Hongchao Li, Hao Liu
  • Patent number: 10730997
    Abstract: The invention relates to a polyisocyanate mixture comprising at least one polyisocyanurate which is based on tolylene diisocyanate and has isocyanate groups and at least one polyurethane which is based on tolylene diisocyanate and has isocyanate groups, wherein the polyisocyanate mixture has a) a solids content of from ?51 to ?90% by weight, based on the total weight of the polyisocyanate mixture and b) a content of monomeric tolylene diisocyanate of ?0.9% by weight, based on the total weight of the polyisocyanate mixture, and the polyisocyanurate which is based on tolylene diisocyanate and has isocyanate groups has a polydispersity D of from ?1 to ?1.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: August 4, 2020
    Assignee: Covestro Deutschland AG
    Inventors: Christoph Irle, Stefan Groth, Ruiwen Wu, Antonio Midolo, Robert Maleika, Hongchao Li, Hao Liu
  • Patent number: 10676448
    Abstract: The invention relates to a novel method for producing polyisocyanurates comprising isocyanate groups, based on 2,4- and 2,6-toluylene diisocyanate (TDI) and to the use thereof in coating compositions.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: June 9, 2020
    Assignee: Covestro Deutschland AG
    Inventors: Josef Sanders, Andreas Hecking, Reinhard Halpaap, Frank Richter, Oswald Wilmes, Jan Busch, Tim Loddenkemper, Friedhelm Steffens, Stefan Groth
  • Publication number: 20200115328
    Abstract: The invention relates to a process for producing a polyisocyanate composition comprising addition of at least one isocyanate-inert solvent to at least one polyisocyanate, characterized in that the addition of the solvent is carried out in one or more stages and at least one of these stages is performed as a continuous dilution. The invention further relates to the polyisocyanate compositions obtainable by the process, to the use of the polyisocyanate compositions, to a two-component system containing the polyisocyanate composition and to composite systems produced with the two-component system.
    Type: Application
    Filed: July 2, 2018
    Publication date: April 16, 2020
    Inventors: Stefan Groth, Ruiwen Wu, Antonio Midolo
  • Publication number: 20190270843
    Abstract: The invention relates to a polyisocyanate mixture comprising at least one polyisocyanurate which is based on tolylene diisocyanate and has isocyanate groups and at least one polyurethane which is based on tolylene diisocyanate and has isocyanate groups, wherein the polyisocyanate mixture has a) a solids content of from ?51 to ?90% by weight, based on the total weight of the polyisocyanate mixture and b) a content of monomeric tolylene diisocyanate of ?0.9% by weight, based on the total weight of the polyisocyanate mixture, and the polyisocyanurate which is based on tolylene diisocyanate and has isocyanate groups has a polydispersity D of from ?1 to ?1.
    Type: Application
    Filed: October 18, 2017
    Publication date: September 5, 2019
    Applicant: COVESTRO DEUTSCHLAND AG
    Inventors: Christoph IRLE, Stefan GROTH, Ruiwen WU, Antonio MIDOLO, Robert MALEIKA, Hongchao LI, Hao LIU
  • Publication number: 20190270842
    Abstract: The invention relates to a polyisocyanate which is based on tolylene 2,4-diisocyanate, tolylene 2,6-diisocyanate or a mixture of tolylene 2,4- and 2,6-diisocyanate and has isocyanurate groups, wherein the polyisocyanate has a) a weight average molecular weight of from ?350 to ?800 g/mol, determined by means of gel permeation chromatography using a polystyrene standard and tetrahydrofuran as eluent in accordance with DIN 55672-1:2016-03, b) a polydispersity D of from >1 to ?1.5, where the polydispersity D is the ratio of weight average and number average molecular weight of the polyisocyanate and the weight average and number average molecular weight are in each case determined by means of gel permeation chromatography using a polystyrene standard and tetrahydrofuran as eluent in accordance with DIN 55672-1:2016-03, and c) a content of monomeric tolylene diisocyanate of ?1% by weight, based on the total weight of the polyisocyanate.
    Type: Application
    Filed: October 18, 2017
    Publication date: September 5, 2019
    Applicant: COVESTRO DEUTSCHLAND AG
    Inventors: Christoph IRLE, Stefan GROTH, Ruiwen WU, Antonio MIDOLO, Robert MALEIKA, Hongchao LI, Hao LIU
  • Publication number: 20190031625
    Abstract: The invention relates to a novel method for producing polyisocyanurates comprising isocyanate groups, based on 2,4- and 2,6-toluylene diisocyanate (TDI) and to the use thereof in coating compositions.
    Type: Application
    Filed: October 3, 2018
    Publication date: January 31, 2019
    Inventors: Josef Sanders, Andreas Hecking, Reinhard Halpaap, Frank Richter, Oswald Wilmes, Jan Busch, Tim Loddenkemper, Friedhelm Steffens, Stefan Groth
  • Patent number: 10131641
    Abstract: The invention relates to a novel method for producing polyisocyanurates comprising isocyanate groups, based on 2,4- and 2,6-toluylene diisocyanate (TDI) and to the use thereof in coating compositions.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: November 20, 2018
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Josef Sanders, Andreas Hecking, Reinhard Halpaap, Frank Richter, Oswald Wilmes, Jan Busch, Tim Loddenkemper, Friedhelm Steffens, Stefan Groth
  • Publication number: 20160031834
    Abstract: The invention relates to a novel method for producing polyisocyanurates comprising isocyanate groups, based on 2,4- and 2,6-toluylene diisocyanate (TDI) and to the use thereof in coating compositions.
    Type: Application
    Filed: March 7, 2014
    Publication date: February 4, 2016
    Inventors: Josef SANDERS, Andreas HECKING, Reinhard HALPAAP, Frank RICHTER, Oswald WILMES, Jan BUSCH, Tim LODDENKEMPER, Friedhelm STEFFENS, Stefan GROTH
  • Patent number: 6806340
    Abstract: Polyurethane coatings which are the reaction product of A) an aliphatic, isocyanate-containing prepolymer having an isocyanate content of 1-8 wt. % and a free monomeric diisocyanate content of less than 2 wt. %, and containing 0.1 to 1.5 moles of per 1000 g of prepolymer of aliphatically bound uretdione and oxadiazinetrione groups, and B) a polyol component B) comprising at least 50 equivalent % of a compound corresponding to the formula HO—X—Y—X—OH where Y represents methylene, ethylene, —C≡C—, cyclohexylene-1,4, -1,3, -1,2, or phenylene-1,4, -1,3, -1,2 and X represents methylene, —OCH2CH2— (the oxygen being bound to the Y), or cyclohexylene-1,4, -1,3, -1,2, and where the equivalent ratio of the free NCO groups to isocyanate-reactive groups is 0.90 to 1.5. The coatings are applied to flexible substrates such as textile or leather by the casting or knife coating process by means of reactive compositions.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: October 19, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stefan Groth, Detlef-Ingo Schütze
  • Patent number: 6762270
    Abstract: The present invention relates to polyurethane prepolymer having terminal alkoxysilane and OH groups which is the reaction product of A) a polyurethane prepolymer prepared by incomplete reaction of i) an aromatic, aliphatic or cycloaliphatic diisocyanate component having an NCO content of 20 to 60% by weight with ii) a polyol component comprising a polyoxyalkylene diol having a number average molecular weight of 3000 to 20,000, wherein the reaction is stopped after 50 to 90% of the OH groups of component ii) are reacted and 10 to 50% are unreacted, with B) a compound having alkoxysilane and amino groups, preferably a compound containing alkoxysilane and aspartate groups. The present invention also relates to a process for preparing these polyurethane prepolymers containing terminal alkoxysilane and OH groups and to isocyanate-free, sealants, adhesives, primers and coatings containing these polyurethane prepolymers containing terminal alkoxysilane and OH groups as binders.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: July 13, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Ludewig, Mathias Matner, Stefan Groth, Gerhard Ruttmann
  • Patent number: 6624282
    Abstract: The present invention relates to reactive compositions containing (A) NCO prepolymers based on (cyclo)aliphatic polyisocyanates having an NCO content of 1 to 8 wt. % and a monomeric polyisocyanate content of less than 2 wt. %, (B) amine-free chain extenders containing at least 50 equivalent percent of a compound melting between 50° and 160° C. having formula (I) HO—X—Y—X—OH  (I)  wherein Y denotes methylene, ethylene, —C≡C—, 1,4-, 1,3-, or 1,2-cyclohexylene, or 1,4-, 1,3-, or 1,2-phenylene, and X denotes methylene, —OCH2CH2— (wherein oxygen is bonded to group Y), or 1,4-, 1,3-, or 1,2-cyclohexylene, and (C) 0 to 20 wt. %, relative to component (A), of inert organic solvents, wherein the equivalent ratio of the free NCO groups of component (A) to the NCO-reactive groups of component (B) is 0.90 to 1.35.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: September 23, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stefan Groth, Josef Pedain, Lutz Schmalstieg, Detlef-Ingo Schütze
  • Publication number: 20030153712
    Abstract: The present invention relates to polyurethane prepolymer having terminal alkoxysilane and OH groups which is the reaction product of
    Type: Application
    Filed: February 3, 2003
    Publication date: August 14, 2003
    Inventors: Michael Ludewig, Mathias Matner, Stefan Groth, Gerhard Ruttmann
  • Patent number: 6559274
    Abstract: The present invention relates to a composition comprising monoaspartic acid esters and polyaspartic acid esters as well as an addition product prepared from an unsaturated dicarboxilic acid compound and a thiol, a process for their production, and their use as reactive component for polyisocyanates in two-component polyurethane systems.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: May 6, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Gertzmann, Lutz Schmalstieg, Stefan Groth
  • Patent number: 6548615
    Abstract: The invention relates to a reactive composition containing A) an isocyanate-containing compound, B) a polyol, C) an organic tin or bismuth compound, D) a thiol group-containing compound or a polyphenol which is able to react with an isocyanate group in the presence of a tertiary amine as activator and with adjacent hydroxyl groups and E) a hydrolyzable halogen compound, wherein the molar ratio SH and/or OH:metal is 2 to 500 and the molar ratio halogen/metal is 0.05 to 10.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: April 15, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stefan Groth, Jan Mazanek, Rolf Langel, Detlef-Ingo Schütze, Jürgen Urban
  • Publication number: 20030032756
    Abstract: The invention relates to polyurethane coatings which are applied to flexible substrates such as textile or leather by the casting or knife coating process by means of reactive compositions.
    Type: Application
    Filed: August 27, 2002
    Publication date: February 13, 2003
    Inventors: Stefan Groth, Detlef-Ingo Schutze
  • Publication number: 20020177682
    Abstract: The present invention relates to reactive compositions containing
    Type: Application
    Filed: August 7, 1997
    Publication date: November 28, 2002
    Inventors: STEFAN GROTH, JOSEF PEDAIN, LUTZ SCHMALSTIEG, DETLEF-INGO SCHUTZE
  • Publication number: 20020132965
    Abstract: The present invention relates to a composition comprising monoaspartic acid esters and polyaspartic acid esters as well as an addition product prepared from an unsaturated dicarboxilic acid compound and a thiol, a process for their production, and their use as reactive component for polyisocyanates in two-component polyurethane systems.
    Type: Application
    Filed: October 10, 2001
    Publication date: September 19, 2002
    Inventors: Rolf Gertzmann, Lutz Schmalstieg, Stefan Groth
  • Patent number: 6288198
    Abstract: The present invention relates to hybrid coating compositions containing A) 5 to 80 wt %, based on the weight of A) and B), of an aliphatic polyisocyanate-aminosilane adduct that is the reaction product of A1) a polyisocyanate component having an average NCO functionality of 2.5 to 5.5 and an isocyanate content, based on solids, of 9 to 50 wt % and containing aliphatic polyisocyanates with A2) at least 0.
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: September 11, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Markus Mechtel, Stefan Groth, Lutz Schmalstieg
  • Patent number: 6281322
    Abstract: The present invention relates to coating compositions containing 40 to 100% by weight, based on resin solids, of an alkoxysilyl-functional polyisocyanate polyurea which is reaction product of A) a polyisocyanate component having an average functionality of 2.5 to 5.5, an NCO content of 11.0 to 20.0% by weight and a monomeric diisocyanate content of less than 10% by weight, and containing at least 50% by weight of a polyisocyanate prepared from 4,4′-diisocyanatodicyclohexyl-methane with B) at least 0.7 equivalents, based on the equivalents of isocyanate groups, of an aminosilane corresponding to formula (I) (RO)nY(3−n)Si—CH2CH2CH2—NHZ  (I),  wherein R represents methyl or ethyl, Y represents methyl, Z represents H, a C1-C12 alkyl or CH2CH2CH2—Si(OR)nY3−n, and n is 1, 2 or 3, and C) optionally other isocyanate-reactive compounds.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: August 28, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stefan Groth, Reinhard Halpaap, Markus Mechtel, Lutz Schmalstieg, Philip E. Yeske