Patents Assigned to Ukima Coulor & Chemicals Mfg. Co., Ltd.
  • Coating compositions
    Patent number: 5489643
    Abstract: Described is a coating composition for the formation of a back coat layer in a magnetic recording medium, which comprises carbon black, a binder and a solvent. The binder is composed of an acrylic-polymer-modified polyurethane resin and a vinyl chloride copolymer having at least one type of terminal groups selected from hydroxyl groups, carboxyl groups or tertiary amino groups.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: February 6, 1996
    Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Coulor & Chemicals Mfg. Co., Ltd.
    Inventors: Eiichi Sugawara, Setsuo Hirose, Yoshinori Konno, Masatoshi Nakajima, Toshiaki Higuchi