Patents by Inventor Ryoichi Obayashi

Ryoichi Obayashi 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 resin composition and aqueous paint
    Patent number: 6048924
    Abstract: The subject of the present invention is to provide a water-borne resin composition having excellent hydrophilicity, that is, water reducibility or water dispersibility, can decrease the amount of organic solvent contained in a coating, has excellent curability, water resistance, flexibility, heat resistance, hardeness which are equivalent to those of solvent-borne amino resin, and which can decrease discharges in a dryer, and a water-borne coating comprised thereof. The above problem can be solved by a water-borne resin composition comprising:amino resin (A) obtained from amino compound (a) comprising at least one carboxyl group in a phenyl group of benzoguanamine, the amino compound (a) represented by chemical formula 1 andwater-borne resin (B) having a functional group reactive with the amino resin (A), and water-borne coating comprising the water-borne resin composition as an essential component.
    Type: Grant
    Filed: May 11, 1998
    Date of Patent: April 11, 2000
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Ryoichi Obayashi, Takeshi Yamashita, Shuichi Koshizawa, Masanori Iwahashi, Taiji Sato, Kiyoshi Onishi, Masaharu Takahashi