Patents by Inventor Steven James Broadwater

Steven James Broadwater 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).

  • Multistage emulsion polymer and improved pigment efficiency
    Patent number: 9447215
    Abstract: This invention provides a multistage emulsion polymer including, as copolymerized units: from 0.5% to 5%, by weight P-acid monomer, based on the weight of the emulsion polymer; from 0% to 0.05% by weight multiethylenically unsaturated monomer, based on the weight of the emulsion polymer; and at least one second monoethylenically unsaturated monomer; the emulsion polymer having a calculated Tg of from ?20° C. to 50° C.; the emulsion polymer is formed by the “pulsed” addition of 75% to 100% of the P-acid monomer during a stage including from 10% to 50% of the total monomer weight, preferably added during the relatively early stages of the polymerization. A multistage polymer/TiO2 composite particle and an aqueous coating composition including the composite particle are also provided.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: September 20, 2016
    Assignee: Rohm and Haas Company
    Inventors: James Charles Bohling, Steven James Broadwater, Arnold Stan Brownell, John William Hook, III, Reginald T. Smart
  • MULTISTAGE EMULSION POLYMER AND IMPROVED PIGMENT EFFICIENCY
    Publication number: 20120058277
    Abstract: This invention provides a multistage emulsion polymer including, as copolymerized units: from 0.5% to 5%, by weight P-acid monomer, based on the weight of the emulsion polymer; from 0% to 0.05% by weight multiethylenically unsaturated monomer, based on the weight of the emulsion polymer; and at least one second monoethylenically unsaturated monomer; the emulsion polymer having a calculated Tg of from ?20° C. to 50° C.; the emulsion polymer is formed by the “pulsed” addition of 75% to 100% of the P-acid monomer during a stage including from 10% to 50% of the total monomer weight, preferably added during the relatively early stages of the polymerization. A multistage polymer/TiO2 composite particle and an aqueous coating composition including the composite particle are also provided.
    Type: Application
    Filed: August 26, 2011
    Publication date: March 8, 2012
    Inventors: James Charles Bohling, Steven James Broadwater, Arnold Stan Brownell, John William Hook, III, Reginald T. Smart