Patents by Inventor Eckhard de Cleur

Eckhard de Cleur 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).

  • Bicyclic amidine-isocyanate adducts
    Patent number: 4455425
    Abstract: New amidine/isocyanate adducts are particularly useful as catalysts for hardening epoxy resins, in particular pulverulent coating compositions based on epoxy resins. New bicyclic amidines are excellent starting materials for manufacturing these amidine/isocyanate adducts.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: June 19, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf-Volker Meyer, Hans J. Kreuder, Eckhard de Cleur
  • Tetrahydropyrimidine-isocyanate addition products
    Patent number: 4455426
    Abstract: New amidine/isocyanate adducts are particularly useful as catalysts for hardening epoxy resins, in particular pulverulent coating compositions based on epoxy resins. New bicyclic amidines are excellent starting materials for manufacturing these amidine/isocyanate adducts.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: June 19, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf-Volker Meyer, Hans J. Kreuder, Eckhard de Cleur
  • Bicyclic amidines
    Patent number: 4424353
    Abstract: New amidine/isocyanate adducts are particularly useful as catalysts for hardening epoxy resins, in particular pulverulent coating compositions based on epoxy resins. New bicyclic amidines are excellent starting materials for manufacturing these amidine/isocyanate adducts.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: January 3, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf-Volker Meyer, Hans J. Kreuder, Eckhard de Cleur
  • Ammonium salts of .alpha.-ketocarboxylic acids
    Patent number: 4369206
    Abstract: This invention relates to new ammonium salts of .alpha.-ketocarboxylic acids, to their use for the production of amines in situ by photochemical decomposition and to photochemically hardenable coating compositions containing these ammonium salts.
    Type: Grant
    Filed: July 2, 1979
    Date of Patent: January 18, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wofram Mayer, Hans Rudolph, Eckhard de Cleur, Manfred Schonfelder
  • Ammonium salts of .alpha.-ketocarboxylic acids
    Patent number: 4301186
    Abstract: This invention relates to new ammonium salts of .alpha.-ketocarboxylic acids, to their use for the production of amines in situ by photochemical decomposition and to photochemically hardenable coating compositions containing these ammonium salts.
    Type: Grant
    Filed: June 28, 1979
    Date of Patent: November 17, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfram Mayer, Hans Rudolph, Eckhard De Cleur, Manfred Schonfelder
  • Pulverulent coating composition
    Patent number: 4248978
    Abstract: Compounds having a melting point above 40.degree. C. which compounds contain uretone imine groups and which are substantially free from volatile isocyanate blocking agents which are split off under stoving conditions are excellent crosslinking agents for pulverulent coating compositions based on hydroxyl groups-containing polymers.
    Type: Grant
    Filed: May 2, 1979
    Date of Patent: February 3, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Eckhard de Cleur, Rolf Dhein, Hans Rudolph, Hans J. Kreuder, Hanns P. Muller, Walter Schafer, Kuno Wagner, Kurt Findeisen
  • Pulverulent coating agents
    Patent number: 4112012
    Abstract: Object of the invention are pulverulent coating compositions which are obtained if the coating compositions contain as crosslinking agents polyglycidyl esters of polycarboxylic acids and as binders polyesters from polyalcohols and predominantly aromatic polycarboxylic acids which contain free carboxyl groups.
    Type: Grant
    Filed: May 27, 1977
    Date of Patent: September 5, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Eckhard de Cleur, Rolf Dhein, Hans Rudolph, Hans Joachim Kreuder
  • Pulverulent coating materials
    Patent number: 3966836
    Abstract: The invention relates to a pulverulent coating material prepared from a polyester which contains free carboxyl groups of succinic acid and cross-linking agents which react with carboxyl groups at elevated temperatures.
    Type: Grant
    Filed: May 28, 1974
    Date of Patent: June 29, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Eckhard DE Cleur, Rolf Dhein, Hans Rudolph, Hans Joachim Kreuder
  • Pulverulent binders
    Patent number: 3935138
    Abstract: Powdered coating agent for use in the sprayed powder process comprising a mixture ofA. free hydroxyl groups containing copolymers having been reacted with an acid anhydride;B. a cross-linker such as triglycidyl isocyanurate or bis- or tris-oxazolines and optionallyC. auxiliary agents such as pigments and levelling agents.The copolymer contains polymerized units of30 to 85% by weight of styrene or derivatives thereof or methylmethacrylate or mixtures thereof;5 to 60% by weight of acrylic or methacrylic esters excepted methylmethacrylate and10 to 30% by weight of hydroxyalkylester of acrylic or methacrylic acid, said copolymer having been reacted with an aliphatic or cycloaliphatic dicarboxylic acid anhydride;4 to 20 parts by weight of the cross-linker are employed for 96 to 80 parts by weight of the acidified copolymer.
    Type: Grant
    Filed: May 28, 1974
    Date of Patent: January 27, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Frank Wingler, Josef Pedain, Richard Muller, Rolf Dhein, Eckhard DE Cleur
  • Pulverent coating materials containing polyoxazolines and polyesters based on succinic anhydride
    Patent number: 3932358
    Abstract: The invention relates to a pulverulent coating material prepared from a polyester which contains free carboxyl groups of succinic acid and cross-linking agents which react with carboxyl groups at elevated temperatures.
    Type: Grant
    Filed: November 4, 1974
    Date of Patent: January 13, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Eckhard de Cleur, Rolf Dhein, Hans Rudolph, Hans Joachim Kreuder