Patents by Inventor Jan Weikard

Jan Weikard 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: 6500876
    Abstract: The invention relates to coating compositions containing: a) urethane (meth)acrylates that contain (meth)acryloyl groups and free isocyanate groups, b) urethane (meth)acrylates that contain (meth)acryloyl groups and free hydroxyl groups, c) the UV initiators that initiate radical polymerization and d) optionally, one or more compounds that react with isocyanates.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: December 31, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jan Weikard, Michael Sonntag, Holger Mundstock
  • Patent number: 6465539
    Abstract: The invention relates to an elastic coating system with which dry surfaces can be formed by UV curing of constituents containing (meth)acryloyl groups and by subsequent crosslinking of constituents containing NCO groups with constituents containing active hydrogen. The invention also relates to their use of this coating, system for coating, inter alia, components of plastic.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: October 15, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jan Weikard, Wolfgang Fischer, Claus Kobusch, Wolfram Küttner
  • Publication number: 20020106524
    Abstract: The present invention relates to a process for process for preparing a coating by
    Type: Application
    Filed: September 20, 2001
    Publication date: August 8, 2002
    Inventors: Jan Weikard, Wolfgang Fischer, Manfred Muller
  • Publication number: 20020081391
    Abstract: The present invention relates to a process for coating a substrate by applying to a substrate a coating composition containing
    Type: Application
    Filed: October 31, 2001
    Publication date: June 27, 2002
    Inventors: Beate Baumbach, Wolfgang Fischer, Christian Fussel, Diethelm Rappen, Jan Weikard
  • Publication number: 20010051668
    Abstract: The present invention relates to a process for preparing urethanes containing (meth)acryloyl groups that are suitable as binders for powder coatings by reacting a polyisocyanate component with a hydroxyl group-containing component that contains at least one compound additionally containing (meth)acryloyl groups in a melt of compounds containing (meth)acryloyl groups, which are crystalline in the solid state, and have a melting point of 30 to 100° C. and a dynamic viscosity at 111° C. of less than 10 Pa·s, at elevated temperature until the NCO content has dropped below 0.5 wt. %.
    Type: Application
    Filed: March 16, 2001
    Publication date: December 13, 2001
    Inventors: Jan Weikard, Christian Zwiener, Wolfgang Fischer, Peter Thometzek
  • Patent number: 6323254
    Abstract: The present invention relates to binders, which can be cured by free-radical polymerization initiated by UV light, and contain a) 10 to 90 parts by wt. of a polymer which contains, in chemically bound form, both ethylenically unsaturated groups and the reaction product of a resin containing abietic acid with not more than 50% of the OH groups of a polyfunctional alcohol having a molecular weight of less than 500, b) 10 to 90 parts by wt. of one or more mono- di-or oligoesters of (meth)acrylic acid having a molecular weight of less than 800 and c) optionally 0.1 to 10 parts by wt. of a photoinitiator component for the free-radical polymerization wherein the weights of a) and b) add up to 100. The present invention also relates to coating compositions containing these binders which are suitable for the production high-gloss coatings.
    Type: Grant
    Filed: January 10, 2000
    Date of Patent: November 27, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jan Weikard, Wolfgang Fischer, Manfred Müller
  • Publication number: 20010038918
    Abstract: The present invention relates to radiation curable aqueous polyurethane dispersions containing 0.05 to 20 wt. %, based on the weight of the non-aqueous constituents of the aqueous polyurethane dispersions, of 2,2-dimethyl-3-hydroxypropionic acid-(2,2-dimethyl-3-hydroxypropyl ester), (HPSNPG, calculated as MW 204.3). The invention also relates to substrates coated with these polyurethane dispersions, in particular to coated wood substrates with good grain enhancing properties.
    Type: Application
    Filed: March 27, 2001
    Publication date: November 8, 2001
    Inventors: Jan Weikard, Erhard Luhmann, Wolfgang Kremer, Jurgen Meixner
  • Publication number: 20010038917
    Abstract: The invention relates to coating compositions containing:
    Type: Application
    Filed: March 16, 2001
    Publication date: November 8, 2001
    Inventors: Jan Weikard, Michael Sonntag, Holger Mundstock
  • Patent number: 6191181
    Abstract: The present invention relates to urethane acrylates, which may be cured with high-energy radiation, in which the urethane acrylates are the reaction product of a) a polyisocyanate component containing 20 to 100 mole %, based on the moles of the polyisocyanate component a), of iminooxadiazine dione group-containing polyisocyanate trimers corresponding to formula A  wherein R1, R2and R3 are the same or different and represent linear or branched, C4-C20 (cyclo)alkyl groups and X is the same or different and represents isocyanate groups or isocyanate group-containing radicals that also contain iminooxadiazine dione, isocyanurate, uretdione, urethane, allophanate, biuret or oxadiazine trione groups, wherein R1, R2 and R3 are attached to a nitrogen atom, with b) an alcohol component containing at least one monobasic, hydroxy-functional, linear or branched C1-C12 alkyl ester of (meth)acrylic acid.
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: February 20, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jan Weikard, Wolfgang Fischer, Frank Richter, Christian Zwiener
  • Patent number: 6150458
    Abstract: The present invention relates to a process for preparing (meth)acrylic acid esters by1) reacting hydroxyl group-containing polyethers, polyesters or polyester ethers with (meth)acrylic acid in the presence of an acid esterification catalyst and a solvent to form (meth)acrylic acid esters, and2) reacting the acid esterification catalyst acid and unreacted (meth)acrylic acid with a compound containing two or more epoxide groups in the presence of the solvent used in step 1).
    Type: Grant
    Filed: July 21, 1999
    Date of Patent: November 21, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jan Weikard, Wolfgang Fischer