Patents Examined by John M. Cover
  • Cored multi-shell emulsion particle
    Patent number: 5273824
    Abstract: A cored multi-shell emulsion particle consisting of a core particle, a void layer existing in the exterior of the core particle and a shell layer, each of which has a diameter of .phi., d and D, respectively, and the ratio of .phi., d and D is in the following range..phi./D=0.1-0.6d/D=0.2-0.8 (d>.phi.)The particle exhibits excellent hiding power, brightness, gloss and thermal insulation property as an organic pigment without impairing drying ability and strength of coated layer.
    Type: Grant
    Filed: February 1, 1991
    Date of Patent: December 28, 1993
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Futoshi Hoshino, Makoto Nakano, Kousuke Someya, Junko Morita, Takeshi Yanagihara, Akihiro Yamazaki