Patents by Inventor Paul J. Lessek

Paul J. Lessek 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).

  • Coating composition including a water-based copolymer cross-linking with a water-dispersible cross-linking agent, method of preparing the same, and a cured film thereof
    Patent number: 6916877
    Abstract: The present invention is directed to a curable, water-based coating composition utilized in waterborne coating systems such as a waterborne primer system. The coating composition is the reaction product of a water-dispersible cross-linking agent and a water-based copolymer prepared by free-radical polymerization. The copolymer is the reaction product of a first block and a second block. The first block is the reaction product of a plurality of ethylenically unsaturated monomers. One of the ethylenically unsaturated monomers includes a functional group suitable for reaction with the cross-linking agent. The functional group in the first block is preferably a carbonate, carbamate, or hydroxyl functional group. Other monomers in the plurality include acrylic acid and methyl methacrylate. The first block is also the reaction product of a vinylaromatic hydrocarbon monomer such as diphenylethylene. The second block is the reaction product of a non-functional, ethylenically unsaturated monomer.
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: July 12, 2005
    Assignee: BASF Corporation
    Inventors: Swaminathan Ramesh, Paul J. Lessek, Wolfgang Bremser, Paul J. Harris
  • Coating composition including a water-based copolymer cross-linking with a water-dispersible cross-linking agent, method of preparing the same, and a cured film thereof
    Publication number: 20020132921
    Abstract: The present invention is directed to a curable, water-based coating composition utilized in waterborne coating systems such as a waterborne primer system. The coating composition is the reaction product of a water-dispersible cross-linking agent and a water-based copolymer prepared by free-radical polymerization. The copolymer is the reaction product of a first block and a second block. The first block is the reaction product of a plurality of ethylenically unsaturated monomers. One of the ethylenically unsaturated monomers includes a functional group suitable for reaction with the cross-linking agent. The functional group in the first block is preferably a carbonate, carbamate, or hydroxyl functional group. Other monomers in the plurality include acrylic acid and methyl methacrylate. The first block is also the reaction product of a vinylaromatic hydrocarbon monomer such as diphenylethylene. The second block is the reaction product of a non-functional, ethylenically unsaturated monomer.
    Type: Application
    Filed: August 14, 2001
    Publication date: September 19, 2002
    Inventors: Swaminathan Ramesh, Paul J. Lessek, Wolfgang Bremser, Paul J. Harris