Patents by Inventor Yuusuke Toyama

Yuusuke Toyama 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).

  • Patent number: 10768473
    Abstract: An object of the present invention is to provide a pressure-sensitive-adhesive composition for forming a pressure-sensitive-adhesive layer capable of keeping a high endurance even when this layer is exposed to a heated environment or allowed to stand still for a long term. Another object of the invention is to provide a pressure-sensitive-adhesive layer formed from the pressure-sensitive-adhesive composition, a pressure-sensitive-adhesive-layer-attached polarizing film having the pressure-sensitive-adhesive layer, and an image display device including the pressure-sensitive-adhesive-layer-attached polarizing film. The composition is a pressure-sensitive-adhesive composition including a (meth)acryl-based polymer, and an oligomer epoxy-group-containing silane coupling agent having an epoxy equivalent of 250 to 600 g/mol.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: September 8, 2020
    Assignee: NITTO DENKO CORPORATION
    Inventors: Masakuni Fujita, Tomoyuki Kimura, Yuusuke Toyama
  • Publication number: 20200207058
    Abstract: A pressure-sensitive adhesive composition is disclosed making it possible that even when a polarizing film and a transparent conductive layer are laminated over each other to interpose a pressure-sensitive adhesive layer there between, this pressure-sensitive adhesive layer is formed as a pressure-sensitive adhesive layer capable of restraining the transparent conductive layer from being corroded, and further restraining a rise in the surface resistance of the transparent conductive layer, and a deterioration in the external appearance of this layer. Also disclosed are a pressure-sensitive adhesive layer made from the pressure-sensitive adhesive composition, a pressure-sensitive-adhesive-layer-attached polarizing film, and an image display device using the pressure-sensitive-adhesive-layer-attached polarizing film. The pressure-sensitive adhesive composition includes a (meth)acryl-based polymer (A) and a conductive agent (B) having a molecular weight of 380 or more.
    Type: Application
    Filed: March 10, 2020
    Publication date: July 2, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Mizue Nagata, Masakuni Fujita, Yuusuke Toyama
  • Patent number: 10422935
    Abstract: A pressure-sensitive adhesive layer attached polarizing film of invention includes a polarizing film; and a pressure-sensitive adhesive layer provided on the polarizing film, wherein the polarizing film comprises a polarizer and a transparent protective film provided on only one side of the polarizer, the pressure-sensitive adhesive layer is provided on a side of the polarizer opposite to the side on which the transparent protective film is provided, and the pressure-sensitive adhesive layer is made from a pressure-sensitive adhesive composition including a (meth)acryl-based polymer (A), an onium-anion salt (B1), and an alkali metal salt (B2). The pressure-sensitive adhesive layer attached polarizing film has a pressure-sensitive adhesive layer possessing an antistatic function and satisfactory durability even after a humidity test under severe conditions and is less prone to degradation of optical properties even after a humidity test under severe conditions.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: September 24, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Atsushi Yasui, Yuusuke Toyama, Arata Fujihara, Tomoyuki Kimura
  • Publication number: 20190154898
    Abstract: Provided is a laminate including: a pressure-sensitive adhesive layer attached polarizing film including a polarizing film and a pressure-sensitive adhesive layer or layers provided on one or both sides of the polarizing film; and a transparent conductive member including a transparent conductive layer in which the transparent conductive member is bonded to the pressure-sensitive adhesive layer attached polarizing film in such a manner that the pressure-sensitive adhesive layer of the pressure-sensitive adhesive layer attached polarizing film is in contact with the transparent conductive layer of the transparent conductive member, wherein the polarizing film includes a polarizer and an inorganic layer or layers provided on one or both sides of the polarizer, and the pressure-sensitive adhesive layer is provided on at least one side of the inorganic layer of the polarizing film. Even when placed on a transparent conductive layer, the laminate can prevent degradation of the transparent conductive layer.
    Type: Application
    Filed: January 7, 2019
    Publication date: May 23, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Atsushi Yasui, Yuusuke Toyama, Shinsuke Akizuki
  • Patent number: 10253220
    Abstract: Provided are an acrylic pressure-sensitive adhesive composition including a (meth)acryl-based polymer and a phosphonic acid compound of formula (1): wherein R is a hydrogen atom or a hydrocarbon residue having 1 to 18 carbon atoms which may have an oxygen atom, or a salt thereof, the composition containing 0.005 to 3 parts by weight of the phosphonic acid compound of formula (1) based on 100 parts by weight of the (meth)acryl-based polymer; a pressure-sensitive adhesive layer made from the acrylic pressure-sensitive adhesive composition; a pressure-sensitive adhesive layer-attached substrate film having the pressure-sensitive adhesive layer; a laminate including the pressure-sensitive adhesive layer-attached substrate film; and an image display device including the laminate or the pressure-sensitive adhesive layer-attached substrate film.
    Type: Grant
    Filed: December 25, 2014
    Date of Patent: April 9, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Shinsuke Akizuki, Yuusuke Toyama, Atsushi Yasui
  • Patent number: 10228496
    Abstract: A pressure-sensitive adhesive layer-attached polarizing film of the invention includes: a polarizing film; and a pressure-sensitive adhesive layer provided on the polarizing film, wherein the polarizing film includes a polarizer and a transparent protective film provided on only one side of the polarizer, the pressure-sensitive adhesive layer is provided on a side of the polarizer where the transparent protective film is absent, and the pressure-sensitive adhesive layer is made of a pressure-sensitive adhesive composition containing a (meth)acryl-based polymer (A) and an alkali metal salt (B). The pressure-sensitive adhesive layer-attached polarizing film has a pressure-sensitive adhesive layer with an antistatic function and satisfactory durability and whose optical properties are less likely to be degraded.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: March 12, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Atsushi Yasui, Yuusuke Toyama, Tomoyuki Kimura, Masayuki Satake, Shusaku Goto, Takeharu Kitagawa, Minoru Miyatake, Tomohiro Mori, Takashi Kamijo
  • Publication number: 20190031815
    Abstract: A pressure-sensitive adhesive composition for an optical film of the present invention comprises a (meth)acryl-based polymer(A): and a polyether compound (B) having a polyether skeleton and a reactive silyl group represented by formula (1): —SiRaM3-a at at least one terminal, wherein R represents a monovalent organic group having 1 to 20 carbon atoms and optionally having a substituent; M represents a hydroxyl group or a hydrolyzable group; and <a> represents an integer of 1 to 3, provided that in cases where two or more R groups, R groups is the same or different, and in cases where two or more M groups, M groups is the same or different. The pressure-sensitive adhesive composition for an optical film is capable of forming a pressure-sensitive adhesive layer having reworkability that enables an optical film to be easily peeled off from a liquid crystal panel or the like with no adhesive residue and satisfactory durability that prevents a bonded optical film from peeling or lifting.
    Type: Application
    Filed: October 1, 2018
    Publication date: January 31, 2019
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yuusuke Toyama, Arata Fujihara, Akiko Sugino, Atsushi Yasui, Masayuki Satake, Mizue Nagata, Tomoyuki Kimura
  • Patent number: 10191195
    Abstract: There is provided a thin polarizing plate with a pressure-sensitive adhesive layer hardly warping. A polarizing plate with a pressure-sensitive adhesive layer of the present invention includes: first pressure-sensitive adhesive layer, a protective film, and a polarizing film in the stated order, wherein: the polarizing film has a thickness of 13 ?m or less; a thickness ratio between the protective film and the polarizing film (thickness of the protective film/thickness of the polarizing film) is from 1.5 to 9.0; and a creep amount when a load of 500 g is applied to the first pressure-sensitive adhesive layer for 1 hour is from 20 ?m/h to 300 ?m/h.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: January 29, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Shinsuke Akizuki, Yuusuke Toyama, Takaaki Ishii
  • Patent number: 10087347
    Abstract: A pressure-sensitive adhesive layer-bearing polarizing film for a transparent conductive coating, includes an iodine-based polarizing film and a pressure-sensitive adhesive layer placed on at least one side of the polarizing film, wherein the iodine-based polarizing film includes an iodine-based polarizer containing 1 to 14% by weight of iodine and/or iodide ions and having a thickness of 2 to 40 ?m and a transparent protective film provided on at least one side of the polarizer and having a water-vapor permeability of 1,000 g/(m2·24 hours) or less at 60° C. and 90% R.H., and the pressure-sensitive adhesive layer has a saturated water content of 3.5% by weight or less at 60° C. and 90% R.H.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: October 2, 2018
    Assignee: NITTO DENKO CORPORATION
    Inventors: Mizue Yamasaki, Atsushi Yasui, Yuusuke Toyama
  • Publication number: 20180188421
    Abstract: A pressure-sensitive adhesive layer-attached polarizing film of the invention includes: a polarizing film; and a pressure-sensitive adhesive layer provided on the polarizing film, wherein the polarizing film includes a polarizer and a transparent protective film provided on only one side of the polarizer, the pressure-sensitive adhesive layer is provided on a side of the polarizer where the transparent protective film is absent, and the pressure-sensitive adhesive layer is made of a pressure-sensitive adhesive composition containing a (meth)acryl-based polymer (A) and an alkali metal salt (B). The pressure-sensitive adhesive layer-attached polarizing film has a pressure-sensitive adhesive layer with an antistatic function and satisfactory durability and whose optical properties are less likely to be degraded.
    Type: Application
    Filed: February 20, 2018
    Publication date: July 5, 2018
    Applicant: NITTO DENKO CORPORATION
    Inventors: Atsushi Yasui, Yuusuke Toyama, Tomoyuki Kimura, Masayuki Satake, Shusaku Goto, Takeharu Kitagawa, Minoru Miyatake, Tomohiro Mori, Takashi Kamijo
  • Patent number: 10005257
    Abstract: A method for producing a pressure-sensitive adhesive layer-carrying optical film includes the step of applying, over the optical film, a coating liquid for anchor layer comprising a mixed solvent comprising 10 to 100% by weight of water and 90 to 0% by weight of an alcohol, and a polyoxyalkylene-group-containing polymer so as to give an applied-coat thickness before drying of 20 ?m or less; and next drying the workpiece under drying conditions satisfying both of the following requirements (1) and (2): (1) the drying temperature T is from 40 to 70° C., and (2) a value obtained by multiplying the drying temperature T (° C.) by the drying period H (seconds), T×H, satisfies: 400?(T×H)?4000, thereby removing the mixed solvent to form the anchor layer.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: June 26, 2018
    Assignee: NITTO DENKO CORPORATION
    Inventors: Yuusuke Toyama, Masakuni Fujita, Atsushi Yasui, Tomoyuki Kimura
  • Publication number: 20180086953
    Abstract: An object of the present invention is to provide a pressure-sensitive-adhesive composition for forming a pressure-sensitive-adhesive layer capable of keeping a high endurance even when this layer is exposed to a heated environment or allowed to stand still for a long term. Another object of the invention is to provide a pressure-sensitive-adhesive layer formed from the pressure-sensitive-adhesive composition, a pressure-sensitive-adhesive-layer-attached polarizing film having the pressure-sensitive-adhesive layer, and an image display device including the pressure-sensitive-adhesive-layer-attached polarizing film. The composition is a pressure-sensitive-adhesive composition including a (meth)acryl-based polymer, and an oligomer epoxy-group-containing silane coupling agent having an epoxy equivalent of 250 to 600 g/mol.
    Type: Application
    Filed: March 23, 2016
    Publication date: March 29, 2018
    Applicant: NITTO DENKO CORPORATION
    Inventors: Masakuni Fujita, Tomoyuki Kimura, Yuusuke Toyama
  • Publication number: 20180051188
    Abstract: A pressure-sensitive adhesive composition is disclosed making it possible that even when a polarizing film and a transparent conductive layer are laminated over each other to interpose a pressure-sensitive adhesive layer there between, this pressure-sensitive adhesive layer is formed as a pressure-sensitive adhesive layer capable of restraining the transparent conductive layer from being corroded, and further restraining a rise in the surface resistance of the transparent conductive layer, and a deterioration in the external appearance of this layer. Also disclosed are a pressure-sensitive adhesive layer made from the pressure-sensitive adhesive composition, a pressure-sensitive-adhesive-layer-attached polarizing film, and an image display device using the pressure-sensitive-adhesive-layer-attached polarizing film. The pressure-sensitive adhesive composition includes a (meth)acryl-based polymer (A) and a conductive agent (B) having a molecular weight of 380 or more.
    Type: Application
    Filed: March 29, 2016
    Publication date: February 22, 2018
    Applicant: NITTO DENKO CORPORATION
    Inventors: Mizue Nagata, Masakuni Fujita, Yuusuke Toyama
  • Publication number: 20180044556
    Abstract: A pressure-sensitive adhesive composition for an optical film of the present invention includes a (meth)acrylic polymer(A) that comprises, as monomer units, 67 to 96.99% by weight of alkyl (meth)acrylate(a1), 1 to 20% by weight of benzyl (meth)acrylate(a2), 2 to 10% by weight of a carboxyl group-containing monomer(a3) and 0.01 to 3% by weight of a hydroxyl group-containing monomer(a4), has a weight average molecular weight(Mw) of 1,600,000 or more, and satisfy a weight average molecular weight(Mw)/number average molecular weight(Mn) ratio of 1.8 to 10. The pressure-sensitive adhesive composition can satisfy durability that does not cause peeling, separation at the state in which the optical film was attached, and can form a pressure-sensitive adhesive layer capable of improving display non-uniformity caused by a white display leakage at a peripheral portion.
    Type: Application
    Filed: October 10, 2017
    Publication date: February 15, 2018
    Applicant: Nitto Denko Corporation
    Inventors: Atsushi Yasui, Yuusuke Toyama, Mizue Nagata, Tomoyuki Kimura, Masayuki Satake
  • Patent number: 9809729
    Abstract: A pressure-sensitive adhesive layer for optical applications of the present invention is made from a pressure-sensitive adhesive for optical applications including a base polymer (A), and the pressure-sensitive adhesive layer for optical applications includes iodine and/or iodide ions (B). The pressure-sensitive adhesive layer for optical applications has an antistatic function and can satisfy a durability.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: November 7, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventors: Atsushi Yasui, Yuusuke Toyama, Takaaki Ishii, Shinsuke Akizuki
  • Patent number: 9676970
    Abstract: A pressure-sensitive adhesive composition, comprising: (A) a (meth)acryl-based polymer; and (B) an ionic compound comprising an anion component and a cation component, wherein the anion component is at least one of an anion component represented by the general formula (1): (CnF2n+1SO2)2N?,??(1) wherein n is an integer of 3 to 10, and an anion component represented by the general formula (2): CF2(CmF2mSO2)2N?,??(2) wherein m is an integer of 2 to 10.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: June 13, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventors: Atsushi Yasui, Yuusuke Toyama, Tomoyuki Kimura, Masayuki Satake
  • Patent number: 9587148
    Abstract: A pressure-sensitive adhesive composition, comprising: a (meth)acryl-based polymer (A); and an ionic compound (B) comprising an anion component and a cation component, wherein the (meth)acryl-based polymer (A) is a hydroxyl group-containing (meth)acryl-based polymer (A) containing a monomer unit derived from a hydroxyl group-containing monomer, and the anion component has an organic group and three or more carbon atoms. The anion component is preferably at least one of anion components represented by the following formula (1): (CnF2n+1SO2)2N???(1) wherein n is an integer of 3 to 10; the following formula (2): CF2(CmF2mSO2)2N???(2) wherein m is an integer of 2 to 10; and the following formula (3): ?O3S(CF2)lSO3???(3) wherein l is an integer of 3 to 10.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: March 7, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventors: Atsushi Yasui, Yuusuke Toyama, Tomoyuki Kimura, Masayuki Satake
  • Patent number: 9557450
    Abstract: A pressure-sensitive adhesive layer-attached polarizing film of the invention includes: a polarizing film; and a pressure-sensitive adhesive layer provided on the polarizing film, wherein the polarizing film includes a polarizer and a transparent protective film provided on only one side of the polarizer, the pressure-sensitive adhesive layer is provided on a side of the polarizer where the transparent protective film is absent, and the pressure-sensitive adhesive layer is made of a pressure-sensitive adhesive composition containing a (meth)acryl-based polymer (A) and an alkali metal salt (B). The pressure-sensitive adhesive layer-attached polarizing film has a pressure-sensitive adhesive layer with an antistatic function and satisfactory durability and whose optical properties are less likely to be degraded.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: January 31, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventors: Atsushi Yasui, Yuusuke Toyama, Tomoyuki Kimura, Masayuki Satake, Shusaku Goto, Takeharu Kitagawa, Minoru Miyatake, Tomohiro Mori, Takashi Kamijo
  • Publication number: 20170022396
    Abstract: A pressure-sensitive adhesive composition comprising: a (meth)acryl-based polymer comprising (a1) 70% by weight or more of a monomer unit derived from an alkyl (meth)acrylate, (a2) 3 to 25% by weight of a monomer unit derived from an aromatic ring-containing (meth)acrylate, (a3) 0.1 to 8% by weight of a monomer unit derived from an amide group-containing monomer, (a4) 0.01 to 2% by weight of a monomer unit derived from a carboxyl group-containing monomer, and (a5) 0.01 to 3% by weight of a monomer unit derived from a hydroxyl group-containing monomer, the (meth)acryl-based polymer having a weight average molecular weight (Mw) of 1,000,000 to 2,500,000 and a weight average molecular weight (Mw)/number average molecular weight (Mn) ratio of 1.8 to 10; and a crosslinking agent, the pressure-sensitive adhesive composition containing 0.01 to 3 parts by weight of the crosslinking agent based on 100 parts by weight of the (meth)acryl-based polymer.
    Type: Application
    Filed: March 31, 2015
    Publication date: January 26, 2017
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomoyuki Kimura, Satoshi Yamamoto, Masakuni Fujita, Yuusuke Toyama
  • Publication number: 20170010399
    Abstract: Provided is a laminate including: a pressure-sensitive adhesive layer attached polarizing film including a polarizing film and a pressure-sensitive adhesive layer or layers provided on one or both sides of the polarizing film; and a transparent conductive member including a transparent conductive layer in which the transparent conductive member is bonded to the pressure-sensitive adhesive layer attached polarizing film in such a manner that the pressure-sensitive adhesive layer of the pressure-sensitive adhesive layer attached polarizing film is in contact with the transparent conductive layer of the transparent conductive member, wherein the polarizing film includes a polarizer and an inorganic layer or layers provided on one or both sides of the polarizer, and the pressure-sensitive adhesive layer is provided on at least one side of the inorganic layer of the polarizing film. Even when placed on a transparent conductive layer, the laminate can prevent degradation of the transparent conductive layer.
    Type: Application
    Filed: February 17, 2015
    Publication date: January 12, 2017
    Applicant: NITTO DENKO CORPORATION
    Inventors: Atsushi Yasui, Yuusuke Toyama, Shinsuke Akizuki