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: 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
  • Patent number: 11578174
    Abstract: The present invention provides an optical composition from which an optical article having reduced poor appearance such as cloudiness and optical strain during lens base material production can be obtained, and when a photochromic compound is added, a photochromic cured body having excellent photochromism and mechanical strength can also be formed, and a polyrotaxane used therefor. The polyrotaxane has a composite molecular structure formed of an axle molecule and a plurality of cyclic molecules clathrating the axle molecule, satisfying at least one of (X) and (Y). (X): A side chain having a secondary or tertiary hydroxyl group is introduced into at least part of the cyclic molecule of the polyrotaxane. (Y): A side chain having a group represented by -A (A is an organic group, and contains at least one hydroxyl group) is introduced into at least part of the cyclic molecule of the polyrotaxane, and a pKa of the hydroxyl group of the compound represented by H-A is 6 or more and less than 14.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: February 14, 2023
    Assignee: Tokuyama Corporation
    Inventors: Yasutomo Shimizu, Katsuhiro Mori, Junji Momoda, Hiromasa Yamamoto
  • Publication number: 20220244428
    Abstract: An ophthalmic medical device including a photochromic polymer having higher transparency under an inactive state through use of a photochromic monomer. An ophthalmic medical device according to one embodiment that includes a photochromic polymer obtained by polymerizing monomer components including a photochromic monomer and a lactam ring-containing monomer, wherein a content ratio of the lactam ring-containing monomer in the monomer components is from 10 wt % to 50 wt %. The ophthalmic medical device is typically a contact lens or an intraocular lens.
    Type: Application
    Filed: June 27, 2019
    Publication date: August 4, 2022
    Applicants: MENICON CO., LTD., TOKUYAMA CORPORATION
    Inventors: Tomomi TOMIDA, Kazuhiko NAKADA, Masaki BABA, Satomu NIIDA, Junji MOMODA, Masayuki MIYAZAKI, Junji TAKENAKA
  • Publication number: 20220213050
    Abstract: A chromene compound which can exhibit excellent photochromic properties. The chromene compound is represented by the following formula (1). In the formula, at least one of R1 or R2 represents the group having the radical-polymerizable group, wherein the group having a radical-polymerizable group is represented by the following formula (2) (wherein R10 represents a linear or branched alkylene group having 1 to 10 carbon atoms and l represents an integer of from 0 to 50); and the ring Z that is represented by the following formula (Z) and is spiro-bonded to a carbon atom located at position-13 in the formula (1) is preferably an aliphatic cyclic group that may have a substituent, the group having 3 to 20 carbon atoms for forming the ring together with the carbon atom at the 13-position, or the like.
    Type: Application
    Filed: June 8, 2020
    Publication date: July 7, 2022
    Applicant: TOKUYAMA CORPORATION
    Inventors: Masayuki MIYAZAKI, Junji TAKENAKA, Junji MOMODA
  • Publication number: 20220162486
    Abstract: The present invention relates to a photochromic optical article including a pair of optical article plates bonded together through an adhesive layer containing a photochromic compound and at least one resin selected from a urethane resin, an epoxy resin, and an acrylic resin, wherein a deviation of the thickness of the adhesive layer on a concentric circle from the central point of the pair of optical article plates is within ±10%. In accordance with the present invention, in the photochromic optical article formed of a pair of optical article plates bonded together through an adhesive layer, a photochromic optical article in which the thickness of the photochromic adhesive layer is prescribed, and which is free from problems, such as a lowering of the appearance quality, can be provided.
    Type: Application
    Filed: April 3, 2020
    Publication date: May 26, 2022
    Applicant: TOKUYAMA CORPORATION
    Inventors: Katsuhiro MORI, Takao NOGUCHI, Junji MOMODA
  • Publication number: 20220056187
    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) 0.1 to 5 parts by mass of an ultraviolet absorber composed of a benzotriazole compound having a specific structure, which has a maximum absorption wavelength of 360 nm or more and less than 380 nm and an absolute value of the difference in solubility parameter (SP value) from the radical polymerizable monomer (A) of 5.5 (cal/cm3)1/2 or less, (C) 1 to 5 parts by mass of an ultraviolet absorber which is at least one selected from a benzotriazole compound, a benzophenone compound and a triazine compound and has a maximum absorption wavelength of less than 360 nm, and (D) 0.05 to 0.5 parts by mass of a radical polymerization initiator.
    Type: Application
    Filed: December 17, 2019
    Publication date: February 24, 2022
    Applicant: TOKUYAMA CORPORATION
    Inventors: Taichi HANASAKI, Ayako OHARA, Junji TAKENAKA, Junji MOMODA
  • Publication number: 20220056170
    Abstract: The present invention is an optical material composition containing (A) 100 parts by mass of a polymerizable monomer, and (B) 0.001 to 0.3 parts by mass of a UV absorbent having a maximum absorption wavelength of 360 nm or more and less than 380 nm and having a specific structure, and an optical material formed of the composition. According to the present invention, there can be provided an optical material composition containing a UV absorbent and having good long-term storage stability, and an optical material formed of the composition, in particular, an optical material composition capable of forming a plastic lens having a high blue light cut rate.
    Type: Application
    Filed: December 17, 2019
    Publication date: February 24, 2022
    Applicant: TOKUYAMA CORPORATION
    Inventors: Ayako OHARA, Taichi HANASAKI, Junji TAKENAKA, Junji MOMODA
  • Publication number: 20220049037
    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: Application
    Filed: December 17, 2019
    Publication date: February 17, 2022
    Applicant: TOKUYAMA CORPORATION
    Inventors: Ayako OHARA, Taichi HANASAKI, Junji TAKENAKA, Junji MOMODA
  • Patent number: 11186600
    Abstract: A bismuth compound which is little toxic, insoluble in a monomer, usable for optical purpose and used as a substitute for a lead compound, in which a phosphoric acid ester having a (meth)acrylic group(s) is bonded to bismuth, and a method of producing the bismuth compound by reacting bismuth (meth)acrylate or bismuth subsalicylate with a phosphoric acid ester having a (meth)acrylic group(s) and carrying out dehydration.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: November 30, 2021
    Assignee: TOKUYAMA CORPORATION
    Inventors: Takayoshi Kawasaki, Junji Momoda, Tomohiro Kawamura, Mayumi Kishi, Michihito Nakatani
  • Publication number: 20210292641
    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: Application
    Filed: July 18, 2019
    Publication date: September 23, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Takao NOGUCHI, Junji TAKENAKA, Junji MOMODA, Takayoshi KAWASAKI, Yasutomo SHIMIZU, Masayuki MIYAZAKI
  • Patent number: 11066523
    Abstract: A photochromic polyrotaxane compound which comprises an axial molecule and a plurality of cyclic molecules clathrating the axial molecule, wherein at least one side chain containing a photochromic moiety is bonded to at least one of the cyclic molecules, and a curable composition comprising the photochromic polyrotaxane compound and a polymerizable compound.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: July 20, 2021
    Assignee: TOKUYAMA CORPORATION
    Inventors: Junji Takenaka, Junji Momoda, Takayoshi Kawasaki, Takao Noguchi, Yasutomo Shimizu, Masayuki Miyazaki
  • Publication number: 20210155830
    Abstract: The present invention includes: a photochromic adhesive composition containing (A) a photochromic compound having, as a substituent, a molecular chain having a molecular weight of 300 or more, and (B) an adhesive urethane (urea) resin, and having a softening point of 140 to 220° C., and a photochromic laminate using the adhesive composition.
    Type: Application
    Filed: April 4, 2019
    Publication date: May 27, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Toshimitsu HIRAREN, Katsuhiro MORI, Junji MOMODA
  • Publication number: 20210108113
    Abstract: Provided is a photochromic optical article obtained by bonding a pair of optical article plates to each other with an adhesive layer that contains (A) a photochromic compound and (B) a urethane resin, wherein (B) the urethane resin is obtained by polymerizing: (B1) a polyiso(thio)cyanate compound having two or more iso(thio)cyanate groups in a molecule; (B2) a poly(thi)ol compound having, in a molecule, two or more active hydrogen-containing groups selected from a hydroxyl group and a thiol group; and (B3) a mono(thi)ol compound having, in a molecule, one active hydrogen-containing group selected from a hydroxyl group and a thiol group. Also provided is a method for manufacturing the photochromic optical article.
    Type: Application
    Filed: April 8, 2019
    Publication date: April 15, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Katsuhiro Mori, Junji Momoda
  • Publication number: 20210070790
    Abstract: A bismuth compound which is little toxic, insoluble in a monomer, usable for optical purpose and used as a substitute for a lead compound, in which a phosphoric acid ester having a (meth)acrylic group(s) is bonded to bismuth, and a method of producing the bismuth compound by reacting bismuth (meth)acrylate or bismuth subsalicylate with a phosphoric acid ester having a (meth)acrylic group(s) and carrying out dehydration.
    Type: Application
    Filed: March 14, 2019
    Publication date: March 11, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Takayoshi KAWASAKI, Junji MOMODA, Tomohiro KAWAMURA, Mayumi KISHI, Michihito NAKATANI
  • Patent number: 10920007
    Abstract: To provide a urethane resin for sliding members which has high abrasion resistance and is considered that crosslinking points are uniformly dispersed so that molecular motion is suitably possible. Particularly, to provide the urethane resin can be advantageously used as a polishing pad. There is provided the urethane resin for polishing is obtained by polymerizing a polymerizable composition comprising (A) a polyrotaxane having a composite molecular structure formed by an axial molecule and a plurality of cyclic molecules clathrating the axial molecule and side chains having an active hydrogen group introduced into at least some of the cyclic molecules and (B) a polyiso(thio)cyanate compound.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: February 16, 2021
    Assignee: TOKUYAMA CORPORATION
    Inventors: Yasutomo Shimizu, Takayoshi Kawasaki, Junji Momoda, Mitsuki Tochi
  • Publication number: 20210003867
    Abstract: A method of producing a plastic lens having a cured coating layer, comprising the steps of: forming an uncured coating layer from a photocurable coating composition comprising at least a) a photochromic compound, b) a radically polymerizable monomer and c) a photopolymerization initiator on one surface of a plastic lens; and irradiating the plastic lens having the uncured coating layer with light from an LED having an emission peak wavelength of 350 nm or more to less than 450 nm from above the outer surface of the uncured coating layer to cure the uncured coating layer.
    Type: Application
    Filed: March 19, 2019
    Publication date: January 7, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Junji TAKENAKA, Junji MOMODA, Yoshihiro ASAHARA, Takashi TAMUKAI
  • Publication number: 20210002545
    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: Application
    Filed: March 22, 2019
    Publication date: January 7, 2021
    Applicant: TOKUYAMA CORPORATION
    Inventors: Ayako OHARA, Junji TAKENAKA, Junji MOMODA
  • Patent number: 10884334
    Abstract: To provide a photocurable resin composition comprising an N-vinyl amide compound, a polyfunctional (meth)acrylate monomer and a photopolymerization initiator and having excellent adhesion to an optical substrate and free from an appearance defect such as a crack or shrinkage and a laminate having a coat layer obtained by curing the photocurable resin composition.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: January 5, 2021
    Assignee: TOKUYAMA CORPORATION
    Inventors: Masayuki Miyazaki, Junji Momoda, Junji Takenaka, Takashi Tamukai
  • Publication number: 20200386915
    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: Application
    Filed: February 19, 2019
    Publication date: December 10, 2020
    Applicant: TOKUYAMA CORPORATION
    Inventors: Katsuhiro MORI, Toshimitsu HIRAREN, Junji MOMODA