Patents by Inventor Takeharu Tabuchi

Takeharu Tabuchi 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).

  • Carbonate group-modified epoxy resin, a process for the preparation thereof, and a heat-curable resin composition
    Patent number: 5733982
    Abstract: Disclosed are a carbonate group-modified epoxy resin in which carbonate groups are introduced into an epoxy resin having secondary hydroxyl groups at terminals or lactone-modified epoxy resin having primary hydroxyl groups at terminals by the ring-opening reaction of a cyclic alkylene carbonate, a process for the preparation thereof, and a thermosetting resin composition containing the carbonate group-modified epoxy resin.
    Type: Grant
    Filed: May 21, 1996
    Date of Patent: March 31, 1998
    Assignees: Daicel Chemical Industries, Ltd., Nippon Paint Co., Ltd.
    Inventors: Takaaki Fujiwa, Takeharu Tabuchi, Hideki Matsui, Shinji Nakano, Shin-ya Yamada, Takao Morimoto
  • Modified acrylic polyyol carbonate polymer
    Patent number: 5658989
    Abstract: A hydroxy-terminated linear carbonate is produced by reacting a cyclic alkylene carbonate such as neopentyl glycol carbonate with a substance having at least one alcoholic hydroxyl group in the presence of a catalyst. Mono- or polyhydric alphatic alcohols, polycaprolactone polyols, hydroxyl group-containing acrylic monomers and polymers, and polyester polyols are modified by the reaction with the cyclic alkylene carbonate to have an enhanced reactivity and resistance to hydrolysis.
    Type: Grant
    Filed: April 12, 1996
    Date of Patent: August 19, 1997
    Assignees: Daicel Chemical Industries, Ltd., Nippon Paint Co., Ltd.
    Inventors: Shinji Nakano, Takao Morimoto, Shin-ya Yamada, Takaaki Fujiwa, Hideki Matsui, Takeharu Tabuchi
  • Acrylic monomer
    Patent number: 5650532
    Abstract: A novel acrylic monomer is produced by addition reacting a hydroxyalkyl (meth)acrylate or its lactone adduct with a cyclic alkylene carbonate, and then acylating the terminal hydroxyl group of the reaction product with a reactive derivative of a monobasic alkanoic acid or a dicarboxylic acid anhydride.
    Type: Grant
    Filed: December 7, 1995
    Date of Patent: July 22, 1997
    Assignees: Nippon Paint Company, Ltd., Daicel Chemical Industries, Ltd.
    Inventors: Takeharu Tabuchi, Takaaki Fujiwa, Shinji Nakano, Shin-ya Yamada
  • Carbonate group-modified epoxy resin, a process for the preparation thereof, and a heat-curable resin composition
    Patent number: 5556927
    Abstract: Disclosed are a carbonate group-modified epoxy resin in which carbonate groups are introduced into an epoxy resin having secondary hydroxyl groups at terminals or lactone-modified epoxy resin having primary hydroxyl groups at terminals by the ring-opening reaction of a cyclic alkylene carbonate, a process for the preparation thereof, and a thermosetting resin composition containing the carbonate group-modified epoxy resin.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 17, 1996
    Assignees: Daicel Chemical Industries, Ltd., Nippon Paint Co., Ltd.
    Inventors: Takaaki Fujiwa, Takeharu Tabuchi, Hideki Matsui, Shinji Nakano, Shin-ya Yamada, Takao Morimoto
  • Process for the production of modified acrylic monomers
    Patent number: 5527968
    Abstract: A hydroxy-terminated linear carbonate is produced by reacting a cyclic alkylene carbonate such as neopentyl glycol carbonate with a substance having at least one alcoholic hydroxyl group in the presence of a catalyst. Mono- or polyhydric alphatic alcohols, polycaprolactone polyols, hydroxyl group-containing acrylic monomers and polymers, and polyester polyols are modified by the reaction with the cyclic alkylene carbonate to have an enhanced reactivity and resistance to hydrolysis.
    Type: Grant
    Filed: August 2, 1995
    Date of Patent: June 18, 1996
    Assignees: Nipon Paint Co., Ltd., Daicel Chemical Industries, Ltd.
    Inventors: Shinji Nakano, Takao Morimoto, Shin-ya Yamada, Takaaki Fujiwa, Hideki Matsui, Takeharu Tabuchi
  • Carbonate modified polyester polyol
    Patent number: 5446110
    Abstract: A hydroxy-terminated linear carbonate is produced by reacting a cyclic alkylene carbonate such as neopentyl glycol carbonate with a substance having at least one alcoholic hydroxyl group in the presence of a catalyst. Mono- or polyhydric alphatic alcohols, polycaprolactone polyols, hydroxyl group-containing acrylic monomers and polymers, and polyester polyols are modified by the reaction with the cyclic alkylene carbonate to have an enhanced reactivity and resistance to hydrolysis.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: August 29, 1995
    Assignees: Nippon Paint Co., Ltd., Diacel Chemical Industries, Ltd.
    Inventors: Shinji Nakano, Takao Morimoto, Shin-ya Yamada, Takaaki Fujiwa, Hideki Matsui, Takeharu Tabuchi