Patents Assigned to Nippon Paint Company Ltd.
  • Method and apparatus for powder surface treating
    Patent number: 4685419
    Abstract: A method and apparatus for powder surface treatment by turning the powder into a fluidized layer while passing gas made, at least partially, of a reactive gas, through the powder, to improve dispersion stability of powder pigments.Since the powder is turned into the fluidized layer by gas made, at least partially, of reactive gas, powder particles are put in close and uniform contact with the reactive gas, ensuring full surface treatment of the powder.
    Type: Grant
    Filed: September 13, 1985
    Date of Patent: August 11, 1987
    Assignee: Nippon Paint Company, Ltd.
    Inventor: Takashi Nakajima
  • Aqueous coating compositions
    Patent number: 4442247
    Abstract: An aqueous coating composition comprising from 45 to 98 parts by weight (solids) of aqueous resin(s) and from 2 to 55 parts by weight (solids) of finely divided water-insoluble resin(s), in which at least a part of said aqueous resin is selected from special type of cationic resins. The resins may have mutually reactive functional groups.
    Type: Grant
    Filed: August 25, 1982
    Date of Patent: April 10, 1984
    Assignee: Nippon Paint Company, Ltd.
    Inventors: Shinichi Ishikura, Kazunori Kanda, Shohachiro Yamaguchi
  • Aqueous coating composition
    Patent number: 4328143
    Abstract: An aqueous coating composition for formation of a coating film having high corrosion-resistance on a metal substrate which comprises (a) a film-forming polymeric material having at least one hydroxyl group and/or at least one carboxyl group, (b) a zwitter-ion compound and (c) an aminoplast resin and/or an epoxy resin with or without (d) a surface active agent having a hydrophilic functional group and at least one hydroxyl group and/or at least one carboxyl group.
    Type: Grant
    Filed: October 31, 1980
    Date of Patent: May 4, 1982
    Assignee: Nippon Paint Company, Ltd.
    Inventors: Minao Izumi, Tamotsu Sobata, Shinichi Ishikura, Keizou Ishii
  • Apparatus for the continuous manufacture of polymer plates
    Patent number: 3936254
    Abstract: A process and apparatus are provided for making polymer plates that inlcude a uniformly thick layer of a resin composition adhering to a base or support plate. The disclosed process includes the steps of applying a resin composition to a base plate. coating the surface of the resin composition with a sheet of thermoplastic material, rolling the covered resin composition and base plate with rollers, cooling the resultant plate, peeling off the sheet material and then drying the resultant polymer plate.
    Type: Grant
    Filed: September 16, 1974
    Date of Patent: February 3, 1976
    Assignee: Nippon Paint Company Ltd.
    Inventors: Teruho Sawada, Takeshi Hirayama, Kenzo Kokubo