Patents by Inventor Johannes WILLENBACHER

Johannes WILLENBACHER 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).

  • Iodine transfer polymerization method and compositions therefrom
    Patent number: 11390703
    Abstract: Iodine transfer radical polymerization of an ethylenically unsaturated monomer comprising (meth)acrylic acid, salt thereof, or combination thereof, in the presence of a radical polymerization initiator, an organoiodide, and a solvent, is a useful method for making (meth)acrylic acid polymers. The amounts of components utilized can be 2 to 100 equivalents of acrylic acid and 2 to 100 equivalents of sodium acrylate, both dissolved in water to form a 15 to 50 weight percent solution, based on the total weight of the acrylic acid, sodium acrylate, and water; 0.05 to 1 equivalent of an azo polymerization initiator, 1 equivalent of an organoiodide; and 0 to 3 equivalents of an iodide salt. (Meth)acrylic acid polymer solutions are made by these methods. The (meth)acrylic polymers are useful as dispersants.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: July 19, 2022
    Assignees: DOW GLOBAL TECHNOLOGIES LLC, ROHM AND HAAS COMPANY, THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Jing Ming Ren, Craig Hawker, Johannes Willenbacher, Alaina McGrath, Benjaporn Narupai, David Laitar, Antony Van Dyk
  • IODINE TRANSFER POLYMERIZATION METHOD AND COMPOSITIONS THEREFROM
    Publication number: 20220106423
    Abstract: Iodine transfer radical polymerization of an ethylenically unsaturated monomer comprising (meth)acrylic acid, salt thereof, or combination thereof, in the presence of a radical polymerization initiator, an organoiodide, and a solvent, is a useful method for making (meth)acrylic acid polymers. The amounts of components utilized can be 2 to 100 equivalents of acrylic acid and 2 to 100 equivalents of sodium acrylate, both dissolved in water to form a 15 to 50 weight percent solution, based on the total weight of the acrylic acid, sodium acrylate, and water; 0.05 to 1 equivalent of an azo polymerization initiator, 1 equivalent of an organoiodide; and 0 to 3 equivalents of an iodide salt. (Meth)acrylic acid polymer solutions are made by these methods. The (meth)acrylic polymers are useful as dispersants.
    Type: Application
    Filed: February 7, 2020
    Publication date: April 7, 2022
    Inventors: Jing Ming REN, Craig HAWKER, Johannes WILLENBACHER, Alaina McGRATH, Benjaporn NARUPAI, David LAITAR, Antony VAN DYK