Patents by Inventor Junji Momoda

Junji Momoda 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: 20240182749
    Abstract: The present invention provides a photochromic curable composition capable of providing a cured product excellent in appearance, a photochromic optical article including the cured product, and a method for producing the same. According to an embodiment, there is provided a photochromic curable composition including (A) a siloxane having an acyclic polysiloxane bond and at least one of a radically polymerizable group and a group reactive with a radically polymerizable group, (B) a radically polymerizable monomer component, and (C) a photochromic compound.
    Type: Application
    Filed: March 8, 2022
    Publication date: June 6, 2024
    Applicant: TOKUYAMA CORPORATION
    Inventors: Taichi HANASAKI, Masayuki MIYAZAKI, Toshimitsu HIRAREN, Katsuhiro MORI, Junji MOMODA
  • Patent number: 11988808
    Abstract: A functional lens comprising a functional laminate (A) having a functional layer (Ac) having photochromic properties and/or polarizability between a first optical sheet (Aa) and a second optical sheet (Ab) both made of a resin such as polyamide resin and a synthetic resin layer (B) made of a resin such as allyl resin or polythiourethane resin on the first optical sheet (Aa) and/or the second optical sheet (Ab) of the functional laminate (A) and having an adhesive strength between the first optical sheet (Aa) and/or the second optical sheet (Ab) and the synthetic resin layer (B) of not less than 50 N.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: May 21, 2024
    Assignee: TOKUYAMA CORPORATION
    Inventors: Katsuhiro Mori, Toshimitsu Hiraren, Junji Momoda
  • Publication number: 20240158647
    Abstract: The present invention provides: a photochromic curable composition for providing a cured product having excellent durability and appearance; and a cured product (photochromic laminate) having a particularly favorable appearance. A photochromic curable composition according to an embodiment includes: (A1) a first hindered amine compound having at least one reactive group selected from the group consisting of a radically polymerizable group and a group reactive with a radically polymerizable group; (B) a radically polymerizable monomer comprising a polyrotaxane component (B1) having a radically polymerizable group while not having a piperidyl group; and (C) a photochromic compound.
    Type: Application
    Filed: March 8, 2022
    Publication date: May 16, 2024
    Applicant: TOKUYAMA CORPORATION
    Inventors: Taichi HANASAKI, Masayuki MIYAZAKI, Toshimitsu HIRAREN, Katsuhiro MORI, Junji MOMODA
  • Patent number: 11976149
    Abstract: The present invention relates to a curable composition for an optical material, containing (A) 100 parts by mass of a radical polymerizable monomer, (B) 0.005 to 0.5 parts by mass of a tetraazaporphyrin compound having a maximum absorption wavelength in a range of 560 nm or more and 620 nm or less, and (C) 0.1 to 10 parts by mass of an ultraviolet absorber having a maximum absorption wavelength in a range of 330 nm or more and 350 nm or less. According to the present invention, it is possible to provide a curable composition for an optical material, capable of being suitably used as a coating material that can easily provide an optical material having good antiglare properties and excellent weather resistance.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: May 7, 2024
    Assignee: TOKUYAMA CORPORATION
    Inventors: Ayako Ohara, Taichi Hanasaki, Junji Takenaka, Junji Momoda
  • Publication number: 20240100810
    Abstract: The present invention aims to provide a resin composition having excellent photochromic properties and mechanical properties. The present invention relates to a resin composition containing (i) a urethane-based resin having a propylene glycol chain in a molecular chain thereof and (ii) a photochromic compound, wherein the intensity ratio of PMIpst to PMIcp (PMIpst/PMIcp) is 8.0 or more and 40.0 or less when PMIpst indicates the total spectral intensity of 16 ppm or more and 20 ppm or less including the spectral intensity of a carbon atom of a methyl group in the propylene glycol chain as measured by 13C-PST/MAS NMR and PMIcp indicates the total spectral intensity of 16 ppm or more and 20 ppm or less including the spectral intensity of the carbon atom of the methyl group in the propylene glycol chain as measured by 13C-CP/MAS NMR.
    Type: Application
    Filed: January 12, 2022
    Publication date: March 28, 2024
    Applicant: TOKUYAMA CORPORATION
    Inventors: Takao NOGUCHI, Katsuhiro MORI, Junji MOMODA
  • Patent number: 11807769
    Abstract: A primer composition for optical articles includes (A) a urethane prepolymer which is a reaction product of an aromatic polyisocyanate compound and a polyol compound, and which has a reactive group at an end, the reactive group being selected from among an isocyanate group and a hydroxyl group, (B) a light absorbing compound which has a maximum absorption wavelength within the range of from 320 nm to 650 nm (inclusive) and (C) an organic solvent which has a solubility parameter of 8 (cal/cm3)1/2 or more, while containing no active hydrogen.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: November 7, 2023
    Assignee: Tokuyama Corporation
    Inventors: Junji Momoda, Shinobu Izumi, Taichi Hanasaki
  • Patent number: 11767467
    Abstract: The present invention relates to a photochromic compound including a polyvalent residue on which at least one group having a photochromic moiety is substituted, and at least one long-chain group not containing a photochromic moiety and having a molecular weight of 300 or more is further substituted; and a curable composition containing the same. In accordance with the present invention, it is possible to provide a photochromic compound which has high solubility in a polymerizable compound serving as a matrix while retaining high photochromic characteristics and is hardly affected by the matrix; and a curable composition containing the same.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: September 26, 2023
    Assignee: TOKUYAMA CORPORATION
    Inventors: Takao Noguchi, Junji Takenaka, Junji Momoda, Takayoshi Kawasaki, Yasutomo Shimizu, Masayuki Miyazaki
  • Publication number: 20230286912
    Abstract: The present invention provides a novel compound for optical materials, and a curable composition, a cured body and an optical article containing the compound for optical materials. According to an embodiment, there is provided a compound for optical materials represented by Formula (Ia) below: In Formula (Ia), X1 and X2 are each NH, S, or O. R1 is a 1- to 30-valent organic residue. R3 is a group composed of a polymer having a repeating unit selected from the group consisting of —(CH2)mO—, —(CH2CH2O)—, —(CH(CH3)CH2O)—, —(CH2CH(CH3)O)—, — (C(?O)—CH2CH2CH2CH2CH2O)—, —(C(?O)—O—CH2CH2CH2CH2CH2O)—, and —(C(?O)—O—CH2CH2CH2CH2CH2CH2O)—, a random copolymer having at least two repeating units selected from the group, or a block copolymer having at least two repeating units selected from the group.
    Type: Application
    Filed: May 25, 2021
    Publication date: September 14, 2023
    Applicant: TOKUYAMA CORPORATION
    Inventors: Takao NOGUCHI, Katsuhiro MORI, Junji MOMODA
  • Publication number: 20230280500
    Abstract: The present invention aims to provide a photochromic compound capable of exhibiting photochromic properties regardless of matrix, and the compound is stably dispersed without aggregation in a process of molding (curing) an optical base material. According to the present invention, a polymer photochromic compound, which has a block polymeric group of an oligomeric chain group having relatively favorable compatibility with a solid matrix and an oligomeric chain group having poor compatibility with a solid matrix, forms a nano- to micro-phase separation structure in a solid matrix. The compound does not rely on the solid matrix, its dispersibility is improved and aggregation is prevented or reduced, whereby excellent photochromic properties can be exhibited.
    Type: Application
    Filed: August 4, 2021
    Publication date: September 7, 2023
    Applicant: TOKUYAMA CORPORATION
    Inventors: Masayuki MIYAZAKI, Katsuhiro MORI, Junji MOMODA
  • Publication number: 20230272252
    Abstract: To provide an adhesive composition capable of firmly bonding polymer sheets together, comprising: (I) 100 parts by mass of an end-unreactive urethane urea resin; and (III) 4.0 to 20 parts by mass of a polyisocyanate compound having at least two isocyanate groups in the molecule, wherein the polyisocyanate compound (III) contains (IIIA) a polyisocyanate compound having an isocyanate group bonded to secondary carbon and (IIIB) a polyisocyanate compound having 4 to 30 carbon atoms in the molecule other than the component (IIIA), and the amount of the component (IIIB) is 10 to 500 parts by mass based on 100 parts by mass of the component (IIIA).
    Type: Application
    Filed: April 18, 2023
    Publication date: August 31, 2023
    Applicant: TOKUYAMA CORPORATION
    Inventors: Katsuhiro MORI, Toshimitsu HIRAREN, Junji MOMODA
  • Publication number: 20230260669
    Abstract: The present invention provides: a curable composition which contains a bismuth compound, wherein a phosphoric acid ester having a (meth)acryloyl group is bonded to bismuth, and a nitrile compound having a radically polymerizable carbon-carbon double bond; a cured body which is obtained by curing this curable composition; a multilayer body which is composed of the above-described cured body and a cured body that is obtained by curing a photochromic curable composition; and a radiation protective material which is formed of the above-described cured body or the above-described multilayer body.
    Type: Application
    Filed: July 13, 2021
    Publication date: August 17, 2023
    Applicant: TOKUYAMA CORPORATION
    Inventors: Takayoshi Kawasaki, Junji Takenaka, Junji Momoda
  • Publication number: 20230242808
    Abstract: A photochromic compound of the present invention comprises at least two monovalent photochromic basic structure groups PC including a T-type photochromic moiety, the photochromic basic structure groups being bonded to an organic group having a non-SO aromatic ring containing neither a sulfur atom nor an oxygen atom.
    Type: Application
    Filed: October 14, 2020
    Publication date: August 3, 2023
    Applicant: TOKUYAMA CORPORATION
    Inventors: Masayuki MIYAZAKI, Junji TAKENAKA, Srinivas VENU, Junji MOMODA, Katsuhiro MORI
  • Publication number: 20230242809
    Abstract: A photochromic hydroxyurethane compound of the present invention is characterized in that, on condition of having at least one photochromic moiety as the photochromic minimal unit in a molecule, it has a hydroxyurethane constitutional unit represented by Formula (1): —X—O—CO—NH—??(1) In the formula, X is an oxygen-containing chain organic group having a hydroxyl group as a substituent, or a hydrogen atom in the hydroxyl group is substituted by any one of (A): a photochromic group having the photochromic moiety; (B): a polymerization reactive group having a polymerizable substituent; (C) an alkyl group having 1 to 10 carbon atoms; (D) a cycloalkyl group having 3 to 10 carbon atoms; or (E): an aryl group having 6 to 14 carbon atoms (each of the groups (C)-(E) can be bonded to an oxygen atom derived from the hydroxyl group via the oxygen-containing chain organic group).
    Type: Application
    Filed: October 9, 2020
    Publication date: August 3, 2023
    Applicant: TOKUYAMA CORPORATION
    Inventors: Masayuki MIYAZAKI, Junji TAKENAKA, Junji MOMODA, Katsuhiro MORI
  • Publication number: 20230211454
    Abstract: The CMP laminated polishing pad of the present invention includes at least a polishing layer and an under layer, wherein the under layer contains a resin obtained by polymerizing a polymerizable composition containing: (A) a polyrotaxane monomer having at least two polymerizable functional groups in a molecule; and (B) a polymerizable monomer other than the polyrotaxane monomer having at least two polymerizable functional groups in a molecule. According to the present invention, a polishing pad having not only good wear resistance but also excellent polishing characteristics (high polishing rate, low scratch property, and high flatness) can be provided.
    Type: Application
    Filed: May 27, 2021
    Publication date: July 6, 2023
    Applicant: TOKUYAMA CORPORATION
    Inventors: Yasutomo SHIMIZU, Takayoshi KAWASAKI, Junji MOMODA, Mitsuki TOCHI
  • Patent number: 11649327
    Abstract: Provided is a photochromic curable composition which forms a cured body that develops excellent photochromic properties. The photochromic curable composition (A) includes: a polyrotaxane monomer wherein, in a polyrotaxane compound having a composite molecular structure composed of an axial molecule and a plurality of cyclic molecules threaded onto the axial molecule, and side chains having OH groups introduced into the cyclic molecules, 1 mol % or more to less than 100 mol % of OH groups in the side chains are modified with a compound having a radical-polymerizable group, (B) a photochromic compound, and (C) a polymerizable monomer other than the (A) polyrotaxane monomer.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: May 16, 2023
    Assignee: Tokuyama Corporation
    Inventors: Shinobu Izumi, Ayako Ohara, Yasutomo Shimizu, Junji Momoda
  • Publication number: 20230133211
    Abstract: The photochromic cyclic compound of the present invention is represented by Formula (1) below: in the formula, L is a divalent bridging group and PC is a divalent T-type photochromic basic structural group having a naphthopyran structure, where one end of the bridging group L is bonded to at least the 3-position of the naphthopyran structure.
    Type: Application
    Filed: February 18, 2021
    Publication date: May 4, 2023
    Applicant: TOKUYAMA CORPORATION
    Inventors: Masayuki MIYAZAKI, Junji TAKENAKA, Junji MOMODA, Srinivas VENU, Katsuhiro MORI
  • Publication number: 20230109024
    Abstract: The present invention provides: a photochromic curable composition which contains (A) a (meth)acrylate composition that contains from 24 to 100% by mass of a polyfunctional (meth)acrylate which has three or more (meth)acryloyl groups in each molecule and (B) a photochromic compound that is obtained by bonding at least one specific naphthopyran to a long-chain group having a number average molecular weight of from 300 to 10,000; and a photochromic optical article which is obtained by polymerizing this photochromic curable composition.
    Type: Application
    Filed: February 26, 2021
    Publication date: April 6, 2023
    Applicant: TOKUYAMA CORPORATION
    Inventors: Masayuki Miyazaki, Katsuhiro Mori, Junji Momoda
  • Publication number: 20230104741
    Abstract: A primer composition for optical article, the composition includes (A) an urethane prepolymer that is a reactant between (A1) a polyisocyanate compound having two or more isocyanate groups per molecule and (A2) at least one polyol compound having two or more hydroxyl groups per molecule and being selected from the group consisting of polycarbonate polyols, polyester polyols, and polycaprolactone polyols, and that has two or more isocyanate groups per molecule protected by a blocking agent; (B) an active hydrogen-containing compound having, per molecule, two or more active hydrogen functional groups having an active hydrogen; and (C) an organic solvent not having an active hydrogen.
    Type: Application
    Filed: February 25, 2021
    Publication date: April 6, 2023
    Applicant: Tokuyama Corporation
    Inventors: Taichi Hanasaki, Katsuhiro Mori, Junji Takenaka, Junji Momoda
  • Publication number: 20230088268
    Abstract: Provided is a moisture curable polyurethane composition that is a moisture curable polyurethane having an isocyanate group on one end of a molecule thereof. The moisture curable polyurethane composition contains a moisture curable polyurethane (A) and an organic solvent (B). The moisture curable polyurethane (A) is obtainable by reacting a polyisocyanate compound having at least two isocyanate groups in a molecule thereof (A1) with a low-molecular weight polyol compound having at least two hydroxyl groups in a molecule thereof and having a number average molecular weight of 50-300 (A2). Also provided is a laminate including an optical substrate and a polyurethane resin layer comprising the moisture curable polyurethane composition.
    Type: Application
    Filed: February 26, 2021
    Publication date: March 23, 2023
    Applicant: TOKUYAMA CORPORATION
    Inventors: Toshimitsu Hiraren, Taichi Hanasaki, Katsuhiro Mori, Junji Tanenaka, Junji Momoda
  • Patent number: 11597874
    Abstract: A photochromic curable composition comprising a radically polymerizable monomer having at least one oxetanyl group in one molecule, a photochromic compound and radically polymerizable monomers other than the above polymerizable monomer, and a photochromic cured body obtained by polymerizing the photochromic curable composition.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: March 7, 2023
    Assignee: TOKUYAMA CORPORATION
    Inventors: Ayako Ohara, Junji Takenaka, Junji Momoda