Patents by Inventor Kosaku Asagi

Kosaku Asagi 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).

  • Method for obtaining para-type wholly aromatic polyamide particles
    Patent number: 8110129
    Abstract: The invention pertains to a method for obtaining para-type wholly aromatic polyamide particles, comprising the steps: a) introducing an aramid polymer solution into a water-based coagulating liquid to obtain a hydrous shaped product; and b) subjecting the never-dried or partly-dried shaped product having a water content of 10 to 99% by weight to freeze-grinding. These aramid polymer particles can be used as a filler material.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: February 7, 2012
    Assignee: Teijin Aramid B.V.
    Inventors: Toru Kurino, Kosaku Asagi
  • Method for Obtaining Para-Type Wholly Aromatic Polyamide
    Publication number: 20100266843
    Abstract: The invention pertains to a method for obtaining para-type wholly aromatic polyamide particles, comprising the steps: a) introducing an aramid polymer solution into a water-based coagulating liquid to obtain a hydrous shaped product; and b) subjecting the never-dried or partly-dried shaped product having a water content of 10 to 99% by weight to freeze-grinding. These aramid polymer particles can be used as a filler material.
    Type: Application
    Filed: December 21, 2006
    Publication date: October 21, 2010
    Applicant: TEIJIN TWARON B.V.
    Inventors: Toru Kurino, Kosaku Asagi
  • Fluororesin sheet, process for producing the same, and the use of same
    Patent number: 6011118
    Abstract: A fluororesin sheet is disclosed which comprises an aromatic polyamide pulp and a fluororesin as an essential component, the tensile strength of the fluororesin sheet being not less than about 250 kg/cm.sup.2. A process for producing this fluororesin sheet comprises dispersing the aromatic polyamide pulp and the fluororesin powder in water, adding a coagulating agent which destabilizes the dispersing of the fluororesin powder to the dispersion to deposit the fluororesin powder on the surface of the aromatic polyamide pulp, paper-making, followed by drying to obtain a sheet article, and compressing the sheet article using a roller, followed by heating.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: January 4, 2000
    Assignee: Akzo Nobel nv
    Inventors: Kosaku Asagi, Toshiharu Yamabayashi
  • Aromatic polyamide pulp and its production process
    Patent number: 5759348
    Abstract: The aromatic polyamide pulp obtained by the process of this invention is good in dispersibility in water and good in opening property, and excellent in dispersibility of inorganic filler and wettability with and adhesion to a matrix resin such as phenol resin. Hence, an impregnated paper and molded article excellent in homogeneity and mechanical strength can be produced. Also, in the case of friction materials free from paper-making step, the filler-retention of pulp in the production process is good and such a result that the filler-dispersibility and mechanical strength of molded article are excellent is obtained, and the pulp can be utilized particularly effectively in uses as asbestos-substitutes.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: June 2, 1998
    Assignee: Akzo Nobel nv
    Inventors: Toshiharu Yamabayashi, Kosaku Asagi