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: 20160326406
    Abstract: Provided are: a pressure-sensitive adhesive composition for optical members having excellent durability, adhesiveness (adhesion), and removability; a pressure-sensitive adhesive layer for optical members that uses the pressure-sensitive adhesive composition; an adhesive optical member; and an image display device. The pressure-sensitive adhesive composition for optical members is characterized by containing 0.02 to 5 parts by weight of a curing catalyst, and 0.2 to 5 parts by weight of an isocyanate compound, with respect to 100 parts by weight of a polymer having a reactive silicon group with a weight average molecular weight of 2000 to 50000 on or near a molecular terminal.
    Type: Application
    Filed: July 15, 2016
    Publication date: November 10, 2016
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yutaka MOROISHI, Fumiko NAKANO, Tetsuo INOUE, Masayuki SATAKE
  • Patent number: 9109142
    Abstract: A photocurable pressure-sensitive adhesive composition, a photocurable pressure-sensitive adhesive layer, and a photocurable pressure-sensitive adhesive sheet including a support and such a photocurable pressure-sensitive adhesive layer formed on at least one side of the support are provided. The photocurable pressure-sensitive adhesive composition can form an adhesive layer that has sufficient initial adhesive strength through the process of drying and cross-linking without having any adhesive protruding at normal temperatures and pressures, hardens easily with light irradiation, and has a high peeling resistance. The photocurable adhesive composition contains a graft polymer that graft-polymerizes a monomer containing a cyclic ether group to a (meth)acrylic polymer and a cationic photopolymerization initiator. The photocurable adhesive layer and the photocurable adhesive sheet are prepared by using said photocurable adhesive composition.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: August 18, 2015
    Assignee: NITTO DENKO CORPORATION
    Inventors: Shigeru Fujita, Yutaka Moroishi, Fumiko Nakano
  • Patent number: 9012549
    Abstract: Provided are: an adhesive composition that is capable of providing an adhesive layer in which titanium-based nanoparticles are stably dispersed, an adhesive layer having more enhanced mechanical characteristics, excellent refractive index and excellent adhesive force, and an adhesive sheet or the like which uses the adhesive composition.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: April 21, 2015
    Assignee: Nitto Denko Corporation
    Inventors: Akiko Tanaka, Yutaka Moroishi, Fumiko Nakano
  • Patent number: 8962135
    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: Grant
    Filed: October 21, 2008
    Date of Patent: February 24, 2015
    Assignee: Nitto Denko Corporation
    Inventors: Shinichi Inoue, Yuusuke Toyama, Mizue Nagata, Toshitsugu Hosokawa, Yutaka Moroishi, Fumiko Nakano
  • Patent number: 8685204
    Abstract: An object of the invention is to provide a pressure-sensitive adhesive optical film-peeling method capable of easily detaching the pressure-sensitive adhesive optical film from a glass substrate with no damage to the glass substrate or no adhesive deposit on the glass substrate, and to provide a pressure-sensitive adhesive optical film suitable for use in such a peeling method. The invention is directed to a method for peeling a pressure-sensitive adhesive optical film from an optical film-carrying glass substrate including a glass substrate and the pressure-sensitive adhesive optical film bonded thereto, which includes: exposing the optical film-carrying glass substrate to an environment at a temperature of 40 to 98° C. and a relative humidity of 60 to 99% for three minutes or more; and then peeling the pressure-sensitive adhesive optical film from the glass substrate under the environment.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: April 1, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Fumiko Nakano, Yutaka Moroishi, Aimi Matsuura, Toshitsugu Hosokawa, Akiko Tanaka
  • Publication number: 20140004341
    Abstract: Provided are: a pressure-sensitive adhesive composition for optical members having excellent durability, adhesiveness (adhesion), and removability; a pressure-sensitive adhesive layer for optical members that uses the pressure-sensitive adhesive composition; an adhesive optical member; and an image display device. The pressure-sensitive adhesive composition for optical members is characterized by containing 0.02 to 5 parts by weight of a curing catalyst, and 0.2 to 5 parts by weight of an isocyanate compound, with respect to 100 parts by weight of a polymer having a reactive silicon group with a weight average molecular weight of 2000 to 50000 on or near a molecular terminal.
    Type: Application
    Filed: March 13, 2012
    Publication date: January 2, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yutaka Moroishi, Fumiko Nakano, Tetsuo Inoue, Masayuki Satake
  • Publication number: 20130143999
    Abstract: Provided are: an adhesive composition that is capable of providing an adhesive layer in which titanium-based nanoparticles are stably dispersed, said adhesive layer having more enhanced mechanical characteristics, excellent refractive index and excellent adhesive force; and an adhesive sheet or the like which uses the adhesive composition.
    Type: Application
    Filed: August 9, 2011
    Publication date: June 6, 2013
    Applicant: NITTO DENKO CORPORATION
    Inventors: Akiko Tanaka, Yutaka Moroishi, Fumiko Nakano
  • Patent number: 8399090
    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: Grant
    Filed: October 17, 2006
    Date of Patent: March 19, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Kohei Yano, Shinichi Inoue, Masayuki Satake, Yutaka Moroishi, Fumiko Nakano
  • Patent number: 8389611
    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: Grant
    Filed: January 10, 2006
    Date of Patent: March 5, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Fumiaki Shirafuji, Masayuki Satake, Kohei Yano, Yutaka Moroishi, Fumiko Nakano
  • Publication number: 20130003389
    Abstract: Disclosed is an optical sheet with an adhesive layer, which has excellent adhesion, excellent aggregability and excellent long-term durability, and wherein an adhesive layer part does not fill recesses and projections over time, said recesses and projections having been formed by processing. Specifically, an optical sheet with an adhesive layer is produced by arranging an adhesive layer on a recessed and projected surface of an optical film which has been subjected to processing for forming recesses and projections. In addition, the optical sheet with an adhesive layer is bonded to various light sources or image display elements, thereby obtaining light sources or image display devices that have improved light extraction efficiency without changing the designs of the light sources or image display elements, while securing uniform light emission and improving viewing angles especially in devices that comprises the image display elements.
    Type: Application
    Filed: March 14, 2011
    Publication date: January 3, 2013
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yutaka Moroishi, Masatsugu Higashi, Shigeru Fujita, Fumiko Nakano, Tetsuo Inoue, Akiko Tanaka, Aimi Matsuura
  • Publication number: 20120244349
    Abstract: Provided is a photocurable pressure-sensitive adhesive composition which does not cause oozing under ordinary temperature and pressure conditions and exhibits sufficient initial tack via drying and crosslinking. The photocurable pressure-sensitive adhesive composition is easily curable by light irradiation and can form a curable pressure-sensitive adhesive layer having high peel resistance. Also provided are a photocurable pressure-sensitive adhesive layer and a photocurable pressure-sensitive adhesive sheet. A photocurable pressure-sensitive adhesive composition is prepared which comprises a graft polymer obtained by grafting a chain that contains a monomer bearing a cyclic ether group onto a (meth)acrylic polymer that contains 0.2 to 10% by weight of hydroxyalkyl(meth)acrylamide monomer units, and a cationic photopolymerization initiator. A photocurable pressure-sensitive adhesive layer using such composition and a photocurable pressure-sensitive adhesive sheet are also prepared.
    Type: Application
    Filed: December 1, 2010
    Publication date: September 27, 2012
    Inventors: Shigeru Fujita, Yutaka Moroishi, Fumiko Nakano, Tetsuo Inoue
  • Publication number: 20120094119
    Abstract: A photocurable pressure-sensitive adhesive composition, a photocurable pressure-sensitive adhesive layer, and a photocurable pressure-sensitive adhesive sheet including a support and such a photocurable pressure-sensitive adhesive layer formed on at least one side of the support are provided. The photocurable pressure-sensitive adhesive composition can form an adhesive layer that has sufficient initial adhesive strength through the process of drying and cross-linking without having any adhesive protruding at normal temperatures and pressures, hardens easily with light irradiation, and has a high peeling resistance. The photocurable adhesive composition contains a graft polymer that graft-polymerizes a monomer containing a cyclic ether group to a (meth)acrylic polymer and a cationic photopolymerization initiator. The photocurable adhesive layer and the photocurable adhesive sheet are prepared by using said photocurable adhesive composition.
    Type: Application
    Filed: April 28, 2010
    Publication date: April 19, 2012
    Applicant: NITTO DENKO CORPORATION
    Inventors: Shigeru Fujita, Yutaka Moroishi, Fumiko Nakano
  • Publication number: 20120064336
    Abstract: An ultraviolet-curable pressure-sensitive adhesive composition, comprising one or more monomer components comprising an acrylic monomer; an aromatic low-molecular-weight polymer having a weight-average molecular weight of 500 to 4000 inclusive, the molecular weight being according to gel permeation chromatography; and a photopolymerization initiator; wherein when the composition is turned into a pressure-sensitive adhesive layer, the haze value of the composition is 10% or less.
    Type: Application
    Filed: May 18, 2010
    Publication date: March 15, 2012
    Inventors: Akiko Tanaka, Yutaka Moroishi, Fumiko Nakano
  • Publication number: 20110217542
    Abstract: There are provided a pressure-sensitive adhesive composition containing stably dispersed metal-based fine particles, having further reinforced mechanical properties, and being capable of forming a pressure-sensitive adhesive layer with excellent refractive index and excellent adhesive strength, and a pressure-sensitive adhesive sheet produced therewith.
    Type: Application
    Filed: August 4, 2009
    Publication date: September 8, 2011
    Applicant: Nitto Denko Corporation
    Inventors: Yutaka Moroishi, Keisuke Hirano, Fumiko Nakano, Akiko Tanaka
  • Patent number: 7939604
    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: Grant
    Filed: April 24, 2008
    Date of Patent: May 10, 2011
    Assignee: Nitto Denko Corporation
    Inventors: Yutaka Moroishi, Fumiko Nakano, Tetsuo Inoue, Yoshihide Kawaguchi, Kohei Yano
  • Patent number: 7923120
    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: Grant
    Filed: September 3, 2008
    Date of Patent: April 12, 2011
    Assignee: Nitto Denko Corporation
    Inventors: Yuusuke Toyama, Masayuki Satake, Akiko Ogasawara, Yutaka Moroishi, Fumiko Nakano
  • Publication number: 20100304134
    Abstract: An object of the invention is to provide a pressure-sensitive adhesive optical film-peeling method capable of easily detaching the pressure-sensitive adhesive optical film from a glass substrate with no damage to the glass substrate or no adhesive deposit on the glass substrate, and to provide a pressure-sensitive adhesive optical film suitable for use in such a peeling method. The invention is directed to a method for peeling a pressure-sensitive adhesive optical film from an optical film-carrying glass substrate including a glass substrate and the pressure-sensitive adhesive optical film bonded thereto, which includes: exposing the optical film-carrying glass substrate to an environment at a temperature of 40 to 98° C. and a relative humidity of 60 to 99% for three minutes or more; and then peeling the pressure-sensitive adhesive optical film from the glass substrate under the environment.
    Type: Application
    Filed: January 20, 2009
    Publication date: December 2, 2010
    Inventors: Fumiko Nakano, Yutaka Moroishi, Aimi Matsuura, Toshitsugu Hosokawa, Akiko Tanaka
  • Publication number: 20090233102
    Abstract: The invention relates to a pressure-sensitive adhesive for an optical film, comprising 0.02 to 2 parts by weight of a peroxide (B) and 0.01 to 5 parts by weight of an isocyanate-based compound (C) contained in 100 parts by weight of a (meth)acrylic polymer (A) consisting primarily of an alkyl(meth)acrylate and not containing a functional group reactive with an isocyanate group. By using the invented pressure-sensitive adhesive for an optical film, there can be obtained a pressure sensitive adhesion type optical film that can suppress warping and light leakage caused by a stress accompanying a dimensional change of members such as an optical film, has high durability, is excellent in handling ability in the manufacturing process and is excellent in quality.
    Type: Application
    Filed: November 17, 2005
    Publication date: September 17, 2009
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yuusuke Toyama, Masayuki Satake, Akiko Ogasawara, Yutaka Moroishi, Fumiko Nakano
  • Publication number: 20090162617
    Abstract: The present invention relates to A backlight system including an adherend for outgoing light, an optical film subjected to embossing or roughening processing treatment so as to increase the surface area thereof, and a pressure-sensitive adhesive layer containing a pressure-sensitive adhesive polymer having a gel fraction of 35 to 85%, in which the adherend and the optical film are joined through the pressure-sensitive adhesive layer. Further, the invention relates to a process for producing the backlight system, an optical sheet with a pressure-sensitive adhesive which is used in the backlight system, and an image display and an illuminating system using the backlight system.
    Type: Application
    Filed: February 26, 2008
    Publication date: June 25, 2009
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yutaka Moroishi, Takashi Tominaga, Yuji Hotta, Fumiko Nakano, Kazumi Higashi, Makoto Kojima
  • Publication number: 20090162577
    Abstract: There is provided an optical film pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive layer that has reworkability such that optical films therewith can be easily separated from liquid crystal panels with no adhesive residue and also has satisfactory processability such that it can be processed without causing adhesive stain or dropout after it is formed on an optical film. The optical film pressure-sensitive adhesive composition includes 100 parts by weight of a (meth)acrylic polymer including, as monomer units, (a) 50 to 99.79% by weight of an alkyl (meth)acrylate monomer, (b) 0.01 to 0.45% by weight of a tertiary amino group-containing monomer, and (c) 0.1 to 3% by weight of a hydroxyl group-containing monomer; and 0.01 to 2 parts by weight of a crosslinking agent that is at least one selected from the group consisting of hexamethylene diisocyanate, hydrogenated xylylene diisocyanate, and isophorone diisocyanate, or a polyisocyanate compound derived therefrom.
    Type: Application
    Filed: December 18, 2008
    Publication date: June 25, 2009
    Applicant: NITTO DENKO CORPORATION
    Inventors: Shinichi INOUE, Yuusuke TOYAMA, Mizue NAGATA, Toshitsugu HOSOKAWA, Yutaka MOROISHI, Fumiko NAKANO