Patents by Inventor Jacob Crosthwaite

Jacob Crosthwaite 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).

  • Water-based polyurethane dispersions and their preparation
    Patent number: 11267925
    Abstract: A prepolymer comprising acid functionality is made by a process comprising the step of contacting: (i) a di-isocyanate, (ii) a polyol containing an acid group, (iii) a polyol without an acid group, and (iv) a metal salt catalyst, the contacting conducted under reaction conditions and in a solvent consisting essentially of: (A) a dialkyl amide, and (B) optionally, an aprotic glycol ether. The prepolymer is useful in the preparation of water-based polyurethane dispersions, and certain of the solvent blends consisting essentially of a dialkyl amide and an optional aprotic glycol ether are azeotropic or pseudo-azeotropic.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: March 8, 2022
    Assignee: Dow Global Technologies LLC
    Inventors: Jing Ji, Felipe A. Donate, Xin Jiang, Cheng Shen, Kazuyuki Hasegawa, Jacob Crosthwaite, Rebecca J. Wachowicz
  • Water-Based Polyurethane Dispersions and Their Preparation
    Publication number: 20200115487
    Abstract: A prepolymer comprising acid functionality is made by a process comprising the step of contacting: (i) a di-isocyanate, (ii) a polyol containing an acid group, (iii) a polyol without an acid group, and (iv) a metal salt catalyst, the contacting conducted under reaction conditions and in a solvent consisting essentially of: (A) a dialkyl amide, and (B) optionally, an aprotic glycol ether. The prepolymer is useful in the preparation of water-based polyurethane dispersions, and certain of the solvent blends consisting essentially of a dialkyl amide and an optional aprotic glycol ether are azeotropic or pseudo-azeotropic.
    Type: Application
    Filed: June 30, 2017
    Publication date: April 16, 2020
    Inventors: Jing Ji, Felipe A. Donate, Xin Jiang, Cheng Shen, Kazuyuki Hasegawa, Jacob Crosthwaite, Rebecca J. Wachowicz