Patents by Inventor Kouichi Ohrui

Kouichi Ohrui 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).

  • Crosslinking plastisol and process for crosslinking vinyl chloride resin
    Patent number: 5444110
    Abstract: A crosslinking plastisol comprising (1) an epoxy group-containing vinyl chloride resin, (2) a triazine compound, (3) a plasticizer, and (4) an optional amino group- and/or thiol group-containing silane compound. The plastisol is capable of providing a shaped article or a laminated article, which has good heat distortion resistance, chemical resistance, resistance to whitening due to water, adhesion, transparency and thermal resistance on processing.
    Type: Grant
    Filed: February 1, 1994
    Date of Patent: August 22, 1995
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Kouitu Kitazawa, Kouichi Ohrui, Eitaro Nakamura
  • Method of preparation of vinyl chloride resin plastisol
    Patent number: 5231125
    Abstract: A vinyl chloride resin plastisol can be prepared without the shearing action mixing conventionally required for mixing a resin and plasticizer, merely by immersing in a conventional plasticizer, aggregates in the form of a dry power and having an average diameter of 80 to 700 .mu.m of vinyl chloride resin particles; using a spray drying apparatus to form aggregates having an average diameter in the range from 80 to 700 .mu.m or by adding an organic fluid which is barely soluble in water and does not dissolve or swell the vinyl chloride resin to the aqueous dispersion of the vinyl chloride particles, followed by drying the aggregates thus formed at a temperature of 70.degree. C.or below.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: July 27, 1993
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Kouitu Kitazawa, Kouichi Ohrui