Patents by Inventor Toshihiro Iwatsuki

Toshihiro Iwatsuki 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).

  • Resinous composition for surface-treating reinforcing fibers and surface-treating process
    Patent number: 4219457
    Abstract: Disclosed are reinforcing fibers, particularly carbon fibers, used for the manufacture of a reinforced plastic composite material which are surface-treated with a resinous composition comprising (A) epoxy resin, (B) condensation product of an acid component comprising unsaturated dibasic acid and a hydroxyl component comprising oxyalkylated bisphenol, and (C) oxyalkylene derivative of phenol. The resinous composition has good dispersibility in water, and the reinforcing fibers surface-treated therewith exhibit improved adhesion to various resin matrixes.
    Type: Grant
    Filed: April 4, 1979
    Date of Patent: August 26, 1980
    Assignee: Toray Industries, Inc.
    Inventors: Itsuki Taniguchi, Ryuichi Itoh, Toshihiro Iwatsuki, Shigehiro Ohuchi
  • Resinous composition for surface-treating reinforcing fibers and surface-treating process
    Patent number: 4167538
    Abstract: Disclosed are reinforcing fibers, particularly carbon fibers, used for the manufacture of a reinforced plastic composite material which are surface-treated with a resinous composition comprising (A) epoxy resin, (B) condensation product of an acid component comprising unsaturated dibasic acid and a hydroxyl component comprising oxyalkylated bisphenol, and (C) oxyalkylene derivative of phenol. The resinous composition has good dispersibility in water, and the reinforcing fibers surface-treated therewith exhibit improved adhesion to various resin matrixes.
    Type: Grant
    Filed: October 18, 1977
    Date of Patent: September 11, 1979
    Assignees: Toray Industries, Inc., Sanyo Chemical Industries, Inc.
    Inventors: Itsuki Taniguchi, Ryuichi Itoh, Toshihiro Iwatsuki, Shigehiro Ohuchi