Patents by Inventor Azumi Koike

Azumi Koike 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).

  • Acrylic adhesive tape and method of producing the same
    Patent number: 9487679
    Abstract: An acrylic adhesive tape exhibiting good adhesion to a curved surface and good peel characteristics under a constant load even in the absence of a cross-linking agent includes an acrylic adhesive layer photo-polymerized by irradiation with ultraviolet rays. The acrylic adhesive layer contains: an acrylic polymer A formed by irradiating a solvent-free photo-polymerizable monomer composition containing an acrylic monomer and a photopolymerization initiator with ultraviolet rays so that the acrylic polymer A is formed by photopolymerization of the acrylic monomer and has a weight average molecular weight of 700,000 to 3,000,000 when a cross-linking agent is absent; an acrylic polymer B having a weight average molecular weight of 350,000 to 650,000; and an adhesion-imparting polymer having a weight average molecular weight of 2,000 to 10,000. The acrylic adhesive layer has a molecular weight distribution of 2.4 to 4.4.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: November 8, 2016
    Assignee: DEXERIALS CORPORATION
    Inventors: Takanori Ogata, Azumi Koike
  • ACRYLIC ADHESIVE TAPE AND METHOD OF PRODUCING THE SAME
    Publication number: 20130224417
    Abstract: An acrylic adhesive tape exhibiting good adhesion to a curved surface and good peel characteristics under a constant load even in the absence of a cross-linking agent includes an acrylic adhesive layer photo-polymerized by irradiation with ultraviolet rays. The acrylic adhesive layer contains: an acrylic polymer A formed by irradiating a solvent-free photo-polymerizable monomer composition containing an acrylic monomer and a photopolymerization initiator with ultraviolet rays so that the acrylic polymer A is formed by photopolymerization of the acrylic monomer and has a weight average molecular weight of 700,000 to 3,000,000 when a cross-linking agent is absent; an acrylic polymer B having a weight average molecular weight of 350,000 to 650,000; and an adhesion-imparting polymer having a weight average molecular weight of 2,000 to 10,000. The acrylic adhesive layer has a molecular weight distribution of 2.4 to 4.4.
    Type: Application
    Filed: September 27, 2011
    Publication date: August 29, 2013
    Applicant: DEXERIALS CORPORATION
    Inventors: Takanori Ogata, Azumi Koike