Patents by Inventor Fumiko Nakano

Fumiko Nakano 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).

  • Publication number: 20090104450
    Abstract: A pressure-sensitive adhesive composition for an optical film of the present invention comprises 100 parts by weight of a (meth)acrylic polymer comprising 45 to 99.99% by weight of an alkyl (meth)acrylate monomer unit and 0.01 to 2% by weight of a tertiary amino group-containing monomer unit; and 0.01 to 2 parts by weight of a peroxide as a crosslinking agent. The pressure-sensitive adhesive composition can form an pressure-sensitive adhesive layer that has satisfactory reworkability such that optical films can be easily peeled from liquid crystal panels with no adhesive residue and also has satisfactory processability such that it can be worked without pressure-sensitive adhesive fouling or dropout.
    Type: Application
    Filed: October 21, 2008
    Publication date: April 23, 2009
    Applicant: NITTO DENKO CORPORATION
    Inventors: Shinichi INOUE, Yuusuke TOYAMA, Mizue NAGATA, Toshitsugu HOSOKAWA, Yutaka MOROISHI, Fumiko NAKANO
  • Publication number: 20090042004
    Abstract: This invention provides a pressure-sensitive adhesive composition that exhibits excellent pressure-sensitive adhesive properties after crosslinking treatment, does not cause lifting or lifting upon heat treatment or treatment under high-humidity conditions particularly even in the case of a pressure-sensitive adhesive layer having a reduced layer thickness, and has excellent durability. A pressure-sensitive adhesive layer formed using the pressure-sensitive adhesive composition, and a process for producing the same are also provided. Further, an optical member with pressure-sensitive adhesive comprising the pressure-sensitive adhesive layer and an image display using the same are provided. The pressure-sensitive adhesive composition is characterized by comprising 100 parts by weight of an (meth)acrylic polymer and 0.02 to 2 parts by weight of a peroxide, and 0.
    Type: Application
    Filed: October 17, 2006
    Publication date: February 12, 2009
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kohei Yano, Shinichi Inoue, Masayuki Satake, Yutaka Moroishi, Fumiko Nakano
  • Publication number: 20090023869
    Abstract: An object of the present invention is to provide a pressure sensitive adhesive composition for an optical member, which is excellent in coating property because of low viscosity, can reduce an amount of an organic solvent used, and can form a pressure sensitive adhesive layer excellent in durability and having high surface uniformity.
    Type: Application
    Filed: January 10, 2006
    Publication date: January 22, 2009
    Applicant: NITTO DENKO CORPORATION
    Inventors: Fumiaki Shirafuji, Masayuki Satake, Kohei Yano, Yutaka Moroishi, Fumiko Nakano
  • Publication number: 20090022988
    Abstract: Provided herein is a pressure sensitive adhesive for an optical film comprising: 100 parts by weight of a (meth)acrylic-based polymer (A) including an alkyl (meth)acrylate (a1) and a (meth)acrylic-based monomer containing a hydroxyl group (a2), as a copolymerizable component, in content in the range of from 0.01 to 5 parts by weight relative to 100 parts by weight of the alkyl (meth)acrylate (a1); 0.02 to 2 parts by weight of a peroxide (B); and 0.001 to 2 parts by weight of an isocyanate-based compound (C), the contents of the peroxide (B) and the isocyanate-based compound (C) being values relative to 100 parts by weight of the (meth)acrylic-based polymer (A).
    Type: Application
    Filed: September 3, 2008
    Publication date: January 22, 2009
    Inventors: Yuusuke Toyama, Masayuki Satake, Akiko Ogasawara, Yutaka Moroishi, Fumiko Nakano
  • Patent number: 7435779
    Abstract: It is an object of the invention to provide a pressure sensitive adhesive for an optical film with which a pressure sensitive adhesive type optical film capable of suppressing bowing and light leakage caused by a stress accompanying a dimensional change of members such as an optical film, high in durability, excellent in handling ability in an aspect of a fabrication process thereof and good in quality can be obtained. There is provided a pressure sensitive adhesive for an optical film comprising: 100 parts by weight of a (meth)acrylic-based polymer (A) including an alkyl (meth)acrylate (a1) and a (meth)acrylic-based monomer containing a hydroxyl group (a2), as a copolymerizable component, in content in the range of from 0.01 to 5 parts by weight relative to 100 parts by weight of the alkyl (meth)acrylate (a1); 0.02 to 2 parts by weight of a peroxide (B); and 0.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: October 14, 2008
    Assignee: Nitto Denko Corporation
    Inventors: Yuusuke Toyama, Masayuki Satake, Akiko Ogasawara, Yutaka Moroishi, Fumiko Nakano
  • Publication number: 20080213585
    Abstract: Provided are a pressure sensitive adhesive composition for optical members and a pressure sensitive adhesive composition for optical members. The pressure sensitive adhesive composition for optical members according to the present invention comprises 100 parts by weight of an acrylic polymer (A) having a weight-average molecular weight of 500,000 or more, containing at least 50 wt % alkyl (meth)acrylate having an alkyl group with 5 or more carbon atoms and 0.2 to 2 wt % unsaturated carboxylic acid as the monomer unit, 0.1 to 4 parts by weight of an acrylic polymer (B) having a weight-average molecular weight of 2,000 to 50,000, containing at least 70 wt % alkyl (meth)acrylate and 1 to 7 wt % unsaturated carboxylic acid as the monomer unit and having a higher carboxylic acid equivalent than that of the acrylic polymer (A), 0.01 to 1 part by weight of a silane coupling agent, and a crosslinking agent.
    Type: Application
    Filed: April 24, 2008
    Publication date: September 4, 2008
    Inventors: Yutaka Moroishi, Fumiko Nakano, Tetsuo Inoue, Yoshihide Kawaguchi, Kohei Yano
  • Patent number: 7385007
    Abstract: The present invention provides a pressure sensitive adhesive composition for optical members, which is excellent in durability, re-releasability and stress relaxation, as well as a pressure sensitive adhesive composition for optical members, which hardly increases adhesion after storage for a long time and does not leave a residual adhesive on glass upon disposal or repair. The pressure sensitive adhesive composition for optical members according to the present invention comprises 100 parts by weight of an acrylic polymer (A) having a weight-average molecular weight of 500,000 or more, containing at least 50 wt % alkyl (meth)acrylate having an alkyl group with 5 or more carbon atoms and 0.2 to 2 wt % unsaturated carboxylic acid as the monomer unit, 0.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: June 10, 2008
    Assignee: Nitto Denko Corporation
    Inventors: Yutaka Moroishi, Fumiko Nakano, Tetsuo Inoue, Yoshihide Kawaguchi, Kohei Yano
  • Publication number: 20060121273
    Abstract: It is an object of the invention to provide a pressure sensitive adhesive for an optical film with which a pressure sensitive adhesive type optical film capable of suppressing bowing and light leakage caused by a stress accompanying a dimensional change of members such as an optical film, high in durability, excellent in handling ability in an aspect of a fabrication process thereof and good in quality can be obtained. There is provided a pressure sensitive adhesive for an optical film comprising: 100 parts by weight of a (meth)acrylic-based polymer (A) including an alkyl (meth)acrylate (a1) and a (meth)acrylic-based monomer containing a hydroxyl group (a2), as a copolymerizable component, in content in the range of from 0.01 to 5 parts by weight relative to 100 parts by weight of the alkyl (meth)acrylate (a1); 0.02 to 2 parts by weight of a peroxide (B); and 0.
    Type: Application
    Filed: November 30, 2005
    Publication date: June 8, 2006
    Inventors: Yuusuke Toyama, Masayuki Satake, Akiko Ogasawara, Yutaka Moroishi, Fumiko Nakano
  • Publication number: 20050049366
    Abstract: An ultraviolet crosslinking pressure-sensitive adhesive composition showing good pressure-sensitive adhesive characteristics is obtained by using a block copolymer of styrenic polymer component and acrylic polymer component. The pressure-sensitive adhesive composition is produced by conducting living radical polymerization of styrenic monomer and acrylic monomer in a proper order in the presence of a transition metal and its ligand using a polymerization initiator to obtain a block copolymer (a) wherein at least one styrenic polymer block A and at least one acrylic polymer block B are bound to each other and mixing it with a trichloromethyl group-containing triazine derivative (b) or, alternatively, to obtain a block copolymer (a) which contains carboxy precursor groups in the acrylic polymer block B, and converting the precursor groups to carboxyl groups, before or after mixing with the component (b), by heat-treating in the presence of an acid catalyst.
    Type: Application
    Filed: March 19, 2004
    Publication date: March 3, 2005
    Inventors: Tomoko Doi, Michiharu Yamamoto, Yutaka Moroishi, Yoshihide Kawaguchi, Fumiko Nakano
  • Publication number: 20050014879
    Abstract: The present invention provides a pressure sensitive adhesive composition for optical members, which is excellent in durability, re-releasability and stress relaxation, as well as a pressure sensitive adhesive composition for optical members, which hardly increases adhesion after storage for a long time and does not leave a residual adhesive on glass upon disposal or repair. The pressure sensitive adhesive composition for optical members according to the present invention comprises 100 parts by weight of an acrylic polymer (A) having a weight-average molecular weight of 500,000 or more, containing at least 50 wt % alkyl (meth)acrylate having an alkyl group with 5 or more carbon atoms and 0.2 to 2 wt % unsaturated carboxylic acid as the monomer unit, 0.
    Type: Application
    Filed: August 6, 2004
    Publication date: January 20, 2005
    Inventors: Yutaka Moroishi, Fumiko Nakano, Tetsuo Inoue, Yoshihide Kawaguchi, Kohei Yano
  • Publication number: 20040210006
    Abstract: An ultraviolet crosslinking pressure-sensitive adhesive composition showing good pressure-sensitive adhesive characteristics is obtained by using a block copolymer of styrenic polymer component and acrylic polymer component. The pressure-sensitive adhesive composition is produced by conducting living radical polymerization of styrenic monomer and acrylic monomer in a proper order in the presence of a transition metal and its ligand using a polymerization initiator to obtain a block copolymer (a) wherein at least one styrenic polymer block A and at least one acrylic polymer block B are bound to each other and mixing it with a trichloromethyl group-containing triazine derivative (b) or, alternatively, to obtain a block copolymer (a) which contains carboxy precursor groups in the acrylic polymer block B, and converting the precursor groups to carboxyl groups, before or after mixing with the component (b), by heat-treating in the presence of an acid catalyst.
    Type: Application
    Filed: April 19, 2004
    Publication date: October 21, 2004
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomoko Doi, Michiharu Yamamoto, Yutaka Moroishi, Yoshihide Kawaguchi, Fumiko Nakano
  • Patent number: 6646107
    Abstract: The object of the present invention is to produce a polymer, which is free from the troubles of the coloration and the decrease in the mechanical properties of molded articles (films, etc.), crosslinkage failure, migration (stain) or the like, by the living radical polymerization method wherein the content of impurities consisting of a transition metal and its ligand employed as a polymerization activator is reduced. A process for producing a polymer is described, comprising: a) the step of performing a polymerization reaction by using a monomer, a transition metal and its ligand and a polymerization initiator to form a polymer; and b) the step of eliminating the transition metal and its ligand contained in the polymer under the condition of a viscosity of 100 Pa·s or below, wherein the step b comprises: b1) the former step of eliminating the transition metal and its ligand insoluble in the polymer; and b2) the latter step of eliminating the transition metal and its ligand dissolved in the polymer.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: November 11, 2003
    Assignee: Nitto Denko Corporation
    Inventors: Yutaka Moroishi, Michiharu Yamamoto, Tetsuo Inoue, Tomoko Doi, Masakazu Sugimoto, Fumiko Nakano
  • Publication number: 20010047061
    Abstract: An ultraviolet crosslinking pressure-sensitive adhesive composition showing good pressure-sensitive adhesive characteristics is obtained by using a block copolymer of styrenic polymer component and acrylic polymer component. The pressure-sensitive adhesive composition is produced by conducting living radical polymerization of styrenic monomer and acrylic monomer in a proper order in the presence of a transition metal and its ligand using a polymerization initiator to obtain a block copolymer (a) wherein at least one styrenic polymer block A and at least one acrylic polymer block B are bound to each other and mixing it with a trichloromethyl group-containing triazine derivative (b) or, alternatively, to obtain a block copolymer (a) which contains carboxyl precursor groups in the acrylic polymer block B, and converting the precursor groups to carboxyl groups, before or after mixing with the component (b), by heat-treating in the presence of an acid catalyst.
    Type: Application
    Filed: February 28, 2001
    Publication date: November 29, 2001
    Inventors: Tomoko Doi, Michiharu Yamamoto, Yutaka Moroishi, Yoshihide Kawaguchi, Fumiko Nakano
  • Publication number: 20010027245
    Abstract: The object of the present invention is to produce a polymer, which is free from the troubles of the coloration and the decrease in the mechanical properties of molded articles (films, etc.), crosslinkage failure, migration (stain) or the like, by the living radical polymerization method wherein the content of impurities consisting of a transition metal and its ligand employed as a polymerization activator is reduced. A process for producing a polymer is described, comprising: a) the step of performing a polymerization reaction by using a monomer, a transition metal and its ligand and a polymerization initiator to form a polymer; and b) the step of eliminating the transition metal and its ligand contained in the polymer under the condition of a viscosity of 100 Pa•s or below, wherein the step b comprises: b1) the former step of eliminating the transition metal and its ligand insoluble in the polymer; and b2) the latter step of eliminating the transition metal and its ligand dissolved in the polymer.
    Type: Application
    Filed: March 7, 2001
    Publication date: October 4, 2001
    Inventors: Yutaka Moroishi, Michiharu Yamamoto, Tetsuo Inoue, Tomoko Doi, Masakazu Sugimoto, Fumiko Nakano