Patents by Inventor Yuuji Soejima

Yuuji Soejima 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).

  • Optical recording medium
    Patent number: 8221865
    Abstract: To provide an optical recording medium excellent in the balance of characteristics, which has a sufficient surface hardness and of which the deformation when the environmental temperature and the environmental humidity change is small. An optical recording medium comprising a resin substrate, a recording and reading layer, a cover coat layer which is a cured product of a radiation-curable composition containing a urethane (meth)acrylate (A) and a (meth)acrylate compound (B) other than the urethane (meth)acrylate (A), and a hard coat layer having a surface hardness of at least B in this order, wherein of the cover coat layer, the ratio of the elastic modulus in tension upon absorbing water to saturation to the elastic modulus in tension at 25° C. under a humidity of 45% is at least 0.20.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: July 17, 2012
    Assignee: Mitsubishi Kagaku Media Co., Ltd.
    Inventors: Akira Esaki, Yuuki Ono, Yuuji Soejima, Kentarou Uchino, Makoto Terauchi, Takeshi Kuriwada
  • OPTICAL RECORDING MEDIUM
    Publication number: 20100055377
    Abstract: To provide an optical recording medium excellent in the balance of characteristics, which has a sufficient surface hardness and of which the deformation when the environmental temperature and the environmental humidity change is small. An optical recording medium comprising a resin substrate, a recording and reading layer, a cover coat layer which is a cured product of a radiation-curable composition containing a urethane (meth)acrylate (A) and a (meth)acrylate compound (B) other than the urethane (meth)acrylate (A), and a hard coat layer having a surface hardness of at least B in this order, wherein of the cover coat layer, the ratio of the elastic modulus in tension upon absorbing water to saturation to the elastic modulus in tension at 25° C. under a humidity of 45% is at least 0.20.
    Type: Application
    Filed: August 20, 2008
    Publication date: March 4, 2010
    Applicant: Mitsubishi Kagaku Media Co., Ltd
    Inventors: Akira Esaki, Yuuki Ono, Yuuji Soejima, Kentarou Uchino, Makoto Terauchi, Takeshi Kuriwada
  • ALIPHATIC TRIISOCYANATE COMPOUND, PROCESS FOR PRODUCING THE SAME, AND POLYURETHANE RESIN MADE FROM THE COMPOUND
    Publication number: 20020123644
    Abstract: 3-isocyanate methyl-1,6-hexamethylene diisocyanate which is useful for the production of polyurethane resins such as polyurethane polyisocyanate; a process for producing 3-isocyanate methyl-1,6-hexamethylene diisocyanate which process comprises reacting 3-aminomethyl-1,6-hexamethylene diamine with phosgene in the presence of a tertiary amine; and a paint or an adhesive containing the polyurethane resin produced using the above isocyanate compound.
    Type: Application
    Filed: October 12, 1999
    Publication date: September 5, 2002
    Inventors: MITSUMASA KITAI, HIROTAKA RYUUTOU, TOSHIHIKO YAHATA, YOSHINORI HARA, HIROSHI IWANE, YUUJI SOEJIMA