Patents by Inventor Erika MAEKAWA

Erika MAEKAWA 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).

  • Aqueous pigment dispersion
    Patent number: 11077692
    Abstract: The present invention relates to a pigment water dispersion containing a pigment, a crosslinked polymer and water, in which the crosslinked polymer is prepared by crosslinking a carboxy group-containing polymer with a crosslinking agent, and has an acid value of not less than 70 mgKOH/g and not more than 300 mgKOH/g; and the pigment water dispersion further contains a formaldehyde-releasing compound. The pigment water dispersion of the present invention is excellent in storage stability even when being stored under high-temperature conditions for a long period of time.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: August 3, 2021
    Assignee: KAO CORPORATION
    Inventors: Takayuki Suzuki, Takako Yamamoto, Erika Maekawa, Yasufumi Ueda
  • POLYMER EMULSION
    Publication number: 20200248012
    Abstract: The present invention relates to a polymer emulsion that is capable of exhibiting excellent rub fastness even when formed into a coating film or even when printed on a low-liquid absorbing printing medium, and a water-based ink for ink-jet printing which is excellent in ejection stability and antibleeding properties upon the ink-jet printing.
    Type: Application
    Filed: July 27, 2018
    Publication date: August 6, 2020
    Applicant: KAO CORPORATION
    Inventors: Takayuki SUZUKI, Takako YAMAMOTO, Erika MAEKAWA, Yasufumi UEDA
  • AQUEOUS PIGMENT DISPERSION
    Publication number: 20200156396
    Abstract: The present invention relates to a pigment water dispersion containing a pigment, a crosslinked polymer and water, in which the crosslinked polymer is prepared by crosslinking a carboxy group-containing polymer with a crosslinking agent, and has an acid value of not less than 70 mgKOH/g and not more than 300 mgKOH/g; and the pigment water dispersion further contains a formaldehyde-releasing compound. The pigment water dispersion of the present invention is excellent in storage stability even when being stored under high-temperature conditions for a long period of time.
    Type: Application
    Filed: July 27, 2018
    Publication date: May 21, 2020
    Applicant: KAO CORPORATION
    Inventors: Takayuki SUZUKI, Takako YAMAMOTO, Erika MAEKAWA, Yasufumi UEDA