Patents Assigned to Polatechno Co., Ltd.
  • Patent number: 10585281
    Abstract: In the present invention, a light-transmitting cover 18 comprises: a polarizing plate 34 having a polarizer; a first support plate 30 adhered to the top surface of the polarizing plate 34 via an adhesive layer 32; and a second support plate 38 adhered to the bottom surface of the polarizing plate 34 via an adhesive layer 36.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: March 10, 2020
    Assignee: POLATECHNO CO., LTD.
    Inventors: Michiyuki Yamamoto, Takahiko Nishikata, Yoshitaka Takeichi
  • Patent number: 10488558
    Abstract: [Problem] To provide: a photosensitive resin composition which is cured by radiation and exhibits excellent wear resistance, antifouling properties, marker pen ink wiping-off properties, fingerprint wiping-off properties and low refractive index, and which provides low reflectance in cases where the photosensitive resin composition is used for an antireflection film; and an antireflection film which has a cured coating film of this photosensitive resin composition. [Solution] A photosensitive resin composition for an antireflection film that is characterized in that a low refractive index layer contains an acrylate, a colloidal silica, and an organic modified dimethyl polysiloxane having an acryloyl group and an acrylate-modified perfluoropolyether that serve as surface modification agents; and an antireflection film which is obtained by curing the photosensitive resin composition.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: November 26, 2019
    Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
    Inventors: Yoshihiko Taira, Ryota Nakashima
  • Publication number: 20190293931
    Abstract: In the present invention, a light-transmitting cover 18 comprises: a polarizing plate 34 having a polarizer; a first support plate 30 adhered to the top surface of the polarizing plate 34 via an adhesive layer 32; and a second support plate 38 adhered to the bottom surface of the polarizing plate 34 via an adhesive layer 36.
    Type: Application
    Filed: May 15, 2017
    Publication date: September 26, 2019
    Applicant: Polatechno Co., Ltd.
    Inventors: Michiyuki YAMAMOTO, Takahiko NISHIKATA, Yoshitaka TAKEICHI
  • Publication number: 20190204679
    Abstract: This liquid crystal display device is configured such that: a polarizing plate having a polarizer for polarizing light is arranged between the substrate of a TFT substrate and a counter substrate; the polarizing plate is provided with a dye polarizer that uses a dichromatic dye; and a wavelength conversion layer for converting the wavelength of light is arranged on the outer side of the polarizing plate when viewed from a liquid crystal layer.
    Type: Application
    Filed: October 24, 2016
    Publication date: July 4, 2019
    Applicant: Polatechno Co., Ltd.
    Inventor: Norio KOMA
  • Patent number: 10215902
    Abstract: A single body, which is a base material that contains a dichromatic dye formed from an azo compound, that exhibits transmissivity of equal to or greater than 35% and a polarization degree adjusted to equal to or greater than 99% and is characterized in that a* and b* values, which are acquired for a polarization element or a polarization plate using JIS?Z?8729, have an a* and b* absolute value that is: less than 1 at the time of a single-body transmittance measurement; less than 2 when two sheets of the base material are arranged parallel to the absorbing axis direction and the a* and b* values are measured; and less than 2 when two sheets of the base material are arranged orthogonal to the absorbing axis direction and the a* and b* values are measured.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: February 26, 2019
    Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
    Inventor: Noriaki Mochizuki
  • Patent number: 10209418
    Abstract: a* and b* values, which define, the hue of a polarization element or a polarization plate using JIS.Z.8729, are adjusted such that the absolute value of the a* and b* values is: less than 1 during a single-body transmittance measurement; less than 2 when two sheets of a base material are arranged parallel, to the absorbing axis direction and the a* and b* values are measured; and less than 2 when two sheets of the base material are arranged orthogonal to the absorbing axis direction and the a* and b* values are measured.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: February 19, 2019
    Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
    Inventor: Noriaki Mochizuki
  • Patent number: 10209417
    Abstract: A polarization element, which is obtained from a base material containing a dichromatic dye formed from an azo compound, is characterized in that the single-body transmittance is 35-60%, and a* and b* values, which are acquired for a polarization element or a polarization plate using JIS?Z?8729, have an a* and b* absolute value that is: less than 1 in a single-body transmittance measurement; less than 2 when two sheets of the base material are arranged parallel to the absorbing axis direction and the a* and b* values are measured; and less than 2 when two sheets of the base material are arranged orthogonal to the absorbing axis direction and the a* and b* values are measured.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: February 19, 2019
    Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
    Inventor: Noriaki Mochizuki
  • Patent number: 10150871
    Abstract: The present invention relates to an azo compound that is useful as a dichroic pigment used in a polarizing plate having excellent polarizing performance and durability and having little color leakage in a visible light region, and used in a neutral gray polarizing plate for vehicle mounting that uses the aforementioned polarizing plate. More specifically, the invention relates to an azo compound that is represented by formula (1) [In the formula, R1-R4 each independently represent a hydrogen atom, a C1-5 alkyl group, a C1-5 alkoxy group, a sulfo group, or a C1-5 alkoxy group having a sulfo group, X represents an amino group having a substituent, a benzoylamino group having a substituent, a phenylamino group having a substituent, a phenylazo group having a substituent, or a naphthotriazole group having a substituent, m represents 3 or 4, n represents 1 or 2, and p represents 1, 2, or 3.], or to a salt of said compound.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: December 11, 2018
    Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
    Inventors: Takahiro Higeta, Takuto Nishiguchi, Mitsunori Nakamura
  • Patent number: 10126468
    Abstract: This achromatic polarizing plate has a high transmissivity, while expressing an achromatic white color when the absorption axes of the polarizing elements are positioned in parallel, and expressing an achromatic black color when the absorption axes of the polarizing elements are positioned orthogonally to one another. This polarizing element contains at least two specific azo compounds, and the absolute value of the difference between the average transmissivity of 420 nm to 480 nm light and the average transmissivity of 520 nm to 590 nm light is equal to or less than 2.5, and the absolute value of the difference between the average transmissivity of 520 nm to 590 nm light and the average transmissivity of 590 nm to 640 nm light is equal to or less than 2.0.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: November 13, 2018
    Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co. Ltd.
    Inventor: Noriaki Mochizuki
  • Patent number: 10007142
    Abstract: A polarizer contains, in a base thereof, at least one of an azo compound represented by Formula (1) or a salt thereof (as compound A), and at least one of an azo compound represented by Formula (2-I), (2-II), (3), (4-I), (4-II), (5-I) or (5-II), or a salt thereof (as compound B).
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: June 26, 2018
    Assignees: NIPPON KAYAKU KABUSHIKI KAISHA, POLATECHNO CO., LTD.
    Inventors: Noriaki Mochizuki, Takahiro Higeta
  • Patent number: 9354371
    Abstract: Azo compounds represented by formula (1) or (2) (In the formulas, A represents a phenyl group or naphthyl group that has at least 1 substituent. R1-R4 represent a hydrogen atom, lower alkyl group or lower alkoxy group, with at least one of R1-R4 being a lower alkoxy group that has a sulfone group. X represents an optionally substituted amino group, optionally substituted benzoylamino group, optionally substituted phenylamino group, optionally substituted phenyl azo group or optionally substituted naphthotriazole group) and salts thereof.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: May 31, 2016
    Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
    Inventors: Takuto Nishiguchi, Hiroaki Ohno, Takahiro Higeta, Yuichi Sadamitsu
  • Patent number: 9341747
    Abstract: The present invention relates to an azo compound represented by the following formula (1) [wherein, A represents a naphthyl group having a substituent, R1 to R6 each independently represent a hydrogen atom, an alkyl group having a carbon atom number of 1 to 5, an alkoxy group having a carbon atom number of 1 to 5, a sulfo group, or an alkoxy group having a sulfo group and a carbon atom number of 1 to 5, and X represents a benzoylamino group having a substituent, a phenylamino group having a substituent, a phenylazo group having a substituent, or a naphthotriazole group having a substituent] and a salt thereof. By using the azo compound or a salt thereof of the present invention, a neutral color polarizing plate and a color polarizing plate for a liquid crystal projector being excellent in polarization performance and durability.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: May 17, 2016
    Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
    Inventors: Takahiro Higeta, Takuto Nishiguchi
  • Patent number: 9341746
    Abstract: The present invention relates to an azo compound represented by the following formula (1), [wherein, A represents a phenyl group which may have a substituent, R1 to R6 each independently represent a hydrogen atom, an alkyl group having a carbon atom number of 1 to 5, an alkoxy group having a carbon atom number of 1 to 5, a sulfo group, or an alkoxy group having a sulfo group and a carbon atom number of 1 to 5, and X represents an amino group which may have a substituent, a benzoylamino group which may have a substituent, a phenylamino group which may have a substituent, a phenylazo group which may have a substituent, or a naphthotriazole group which may have a substituent] or/and a salt thereof and to a polarizing film and a polarizing plate which contain it.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: May 17, 2016
    Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
    Inventors: Takahiro Higeta, Takuto Nishiguchi
  • Publication number: 20160041322
    Abstract: [Problem] To provide a highly-transmissive polarization plate that can express achromatic white when a polarization element is arranged parallel, to an absorbing axis, and achromatic black when the polarization element is arranged orthogonal to the absorbing axis. [Solution] a* and b* values, which define, the hue of a polarization element or a polarization plate using JIS.Z.8729, are adjusted such that the absolute value of the a* and b* values is: less than 1 during a single-body transmittance measurement; less than 2 when two sheets of a base material are arranged parallel, to the absorbing axis direction and the a* and b* values are measured; and less than 2 when two sheets of the base material are arranged orthogonal to the absorbing axis direction and the a* and b* values are measured.
    Type: Application
    Filed: December 4, 2013
    Publication date: February 11, 2016
    Applicants: NIPPON KAYAKU KABUSHIKI KAISHA, POLATECHNO CO., LTD.
    Inventor: Noriaki Mochizuki
  • Publication number: 20160041321
    Abstract: [Problem] To provide a highly-transmissive polarization plate that can express achromatic white when a polarization element is arranged parallel to an absorbing axis, and achromatic black when the polarization element is arranged orthogonal to the absorbing axis. [Solution] A polarization element, which is obtained from a base material containing a dichromatic dye formed from an azo compound, is characterized in that the single-body transmittance is 35-60%, and a* and b* values, which are acquired for a polarization element or a polarization plate using JIS•Z•8729, have an a* and b* absolute value that is: less than 1 in a single-body transmittance measurement; less than 2 when two sheets of the base material are arranged parallel to the absorbing axis direction and the a* and b* values are measured; and less than 2 when two sheets of the base material are arranged orthogonal to the absorbing axis direction and the a* and b* values are measured.
    Type: Application
    Filed: December 4, 2013
    Publication date: February 11, 2016
    Applicants: NIPPON KAYAKU KABUSHIKI KAISHA, POLATECHNO CO., LTD.
    Inventor: Noriaki Mochizuki
  • Patent number: 9244194
    Abstract: The present invention relates to an azo compound represented by the following formula (1) [wherein, A represents a naphthyl group having a substituent, R1 to R6 each independently represent a hydrogen atom, an alkyl group having a carbon atom number of 1 to 5, an alkoxy group having a carbon atom number of 1 to 5, a sulfo group, or an alkoxy group having a sulfo group and a carbon atom number of 1 to 5, and X represents a benzoylamino group having a substituent, a phenylamine group having a substituent, a phenylazo group having a substituent, or a naphthotriazole group having a substituent] and a salt thereof. A neutral color polarizing plate and a color polarizing plate for a liquid crystal projector being excellent in polarization performance and durability and having less color leakage in a visible light region can be provided.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: January 26, 2016
    Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
    Inventors: Takahiro Higeta, Takuto Nishiguchi
  • Patent number: 9244198
    Abstract: The present invention relates to an azo compound represented by the following formula (1), [wherein, A represents a phenyl group which may have a substituent, R1 to R6 each independently represent a hydrogen atom, an alkyl group having a carbon atom number of 1 to 5, an alkoxy group having a carbon atom number of 1 to 5, a sulfo group, or an alkoxy group having a sulfo group and a carbon atom number of 1 to 5, and X represents an amino group which may have a substituent, a benzoylamino group which may have a substituent, a phenylamino group which may have a substituent, a phenylazo group which may have a substituent, or a naphthotriazole group which may have a substituent] or/and a salt thereof and to a polarizing film and a polarizing plate which contain it.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: January 26, 2016
    Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
    Inventors: Takahiro Higeta, Takuto Nishiguchi
  • Patent number: 9213130
    Abstract: Disclosed is an azo compound represented by the general formula (1) or a salt thereof: wherein R1 and R2 independently represent a hydrogen atom, a lower alkyl group or a lower alkoxy group; and n represents 1 or 2. Also disclosed are a dye-containing polarizing film and a dye-containing polarizing plate, each of which comprises a polarizing film base material and the azo compound contained in the base material.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: December 15, 2015
    Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
    Inventors: Yuichi Sadamitsu, Takuto Nishiguchi, Hiroaki Ohno
  • Patent number: 9181479
    Abstract: A retardation element containing a liquid crystalline compound, and at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2) and a compound represented by the following formula (3). In the formula (1), n represents an integer of 3 to 10 and R2 represents a —CH2—CH2— group, a —CH2—CH(CH3)— group or a —CH2—CH2—CH2— group. In the formula (2), R3 represents a —(CH2)p— group or a phenylene group and p represents an integer of 4 to 8. In the formula (3), R4 represents a substituted phenylene group. In the formulas (1) to (3), R1-1, R1-2 and R1-3 each represent an alkyl group having a branched structure having 5 or more carbon atoms and R1-1, R1-2 and R1-3 may be the same or different.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: November 10, 2015
    Assignees: SEKISUI CHEMICAL CO., LTD., NIPPON KAYAKU KABUSHIKI KAISHA, POLATECHNO CO., LTD
    Inventors: Juichi Fukatani, Izumi Omoto, Seiko Ichikawa, Kouichi Tanaka, Mayu Kameda
  • Patent number: 9180648
    Abstract: A laminate for a laminated glass, comprising an interlayer film for a laminated glass laminated with a retardation element interposed between an adhesive layer A and an adhesive layer B, wherein the retardation element contains a liquid-crystal compound and at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), and a compound represented by the following formula (3). In formula (1), n represents an integer from 3 to 10 and R2 represents a —CH2—CH2— group, a —CH2—CH(CH3)— group, or a —CH2—CH2—CH2— group. In formula (2), R3 represents a —(CH2)p— group or a phenylene group and p represents an integer from 4 to 8. In formula (3), R4 represents a substituted phenylene group. R1-1, R1-2, and R1-3 in formulas (1) to (3) are the same or different, each representing an alkyl group that has a branched structure and that contains at least 5 carbon atoms.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: November 10, 2015
    Assignees: SEKISUI CHEMICAL CO., LTD., NIPPON KAYAKU KABUSHIKI KAISHA, POLATECHNO CO., LTD.
    Inventors: Juichi Fukatani, Izumi Omoto, Seiko Ichikawa, Kouichi Tanaka, Mayu Kameda