Patents by Inventor Takio WAKUGAWA

Takio WAKUGAWA 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).

  • Patent number: 12043775
    Abstract: In one embodiment, there is provided an adhesive film having (?) a layer of polyvinyl chloride resin film and (?) an adhesive layer in the stated order from the surface-layer side, where the (?) adhesive layer is formed from an adhesive including: (A) 100 parts by mass of an acrylic polymer that satisfies the features (a1) and (a2), specifically (a1) an acid value of 18-27 mg KOH/g, and (a2) a mass-average molecular weight of 500,000 to 1,000,000; and (B) 0.1-3 parts by mass of a compound having two or more isocyanate groups per molecule. In another embodiment, there is provided an adhesive film having (?) a layer of polyvinyl chloride resin film and (?) an adhesive layer in the stated order from the surface-layer side, where the (?) adhesive layer has a tackiness of 12-25 N at a surface temperature of 5° C. and has a tackiness of 12-23 N at a surface temperature of 35° C.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: July 23, 2024
    Assignee: RIKEN TECHNOS CORPORATION
    Inventors: Hitomi Inomata, Takio Wakugawa
  • Publication number: 20190276710
    Abstract: In one embodiment, there is provided an adhesive film having (?) a layer of polyvinyl chloride resin film and (?) an adhesive layer in the stated order from the surface-layer side, where the (?) adhesive layer is formed from an adhesive including: (A) 100 parts by mass of an acrylic polymer that satisfies the features (a1) and (a2), specifically (a1) an acid value of 18-27 mg KOH/g, and (a2) a mass-average molecular weight of 500,000 to 1,000,000; and (B) 0.1-3 parts by mass of a compound having two or more isocyanate groups per molecule. In another embodiment, there is provided an adhesive film having (?) a layer of polyvinyl chloride resin film and (?) an adhesive layer in the stated order from the surface-layer side, where the (?) adhesive layer has a tackiness of 12-25 N at a surface temperature of 5° C. and has a tackiness of 12-23 N at a surface temperature of 35° C.
    Type: Application
    Filed: August 28, 2017
    Publication date: September 12, 2019
    Applicant: RIKEN TECHNOS CORPORATION
    Inventors: Hitomi INOMATA, Takio WAKUGAWA