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: 20160167324
    Abstract: A photopolymerization device includes a base to which a shaft insertion hole is formed; a workpiece retaining and rotating shaft section which passes through the shaft insertion hole; cover member which has an opening closable by the base and forms workpiece accomodation chamber, accomodating the workpiece, by contacting the base with a peripheral part of the opening; light irradiation device; and controller which controls relative movement of the base and the cover member. The controller controls formation of the workpiece accomodation chamber by contacting the base with the peripheral part and rotation of the workpiece in a first region of the workpiece accomodation chamber, subsequently, the workpiece placement in a second region by relative movement of the workpiece retaining and rotating shaft section to the base, and light irradiation toward the workpiece placed in the second region by the light irradiation device.
    Type: Application
    Filed: August 1, 2014
    Publication date: June 16, 2016
    Inventors: Yoshihiro Asahara, Junji Momoda
  • Publication number: 20160116765
    Abstract: A photochromic curable composition comprising (A) a polymerizable monomer component that contains a (meth)acrylic polymerizable monomer (X), and (B) a photochromic compound, wherein the (meth)acrylic polymerizable monomer (X) is constituted by 80 to 97 parts by mass of a polyfunctional monomer (Xp) having not less than two (meth)acrylic groups in a molecule thereof, and 3 to 20 parts by mass of a monofunctional monomer (Xm) having one (meth)acrylic group in a molecule thereof, the monofunctional polymerizable monomer (Xm) is constituted by an epoxy group-containing monomer (Xm1) and an isocyanate group-containing monomer (Xm2), and the isocyanate group-containing monomer (Xm2) and the epoxy group-containing monomer (Xm1) are contained at a mass ratio of Xm2/Xm1=3 to 40.
    Type: Application
    Filed: July 9, 2014
    Publication date: April 28, 2016
    Applicant: TOKUYAMA CORPORATION
    Inventors: Yasutomo SHIMIZU, Katsuhiro MORI, Junji MOMODA
  • Publication number: 20160002524
    Abstract: A curable composition which comprises a carbonate-based polymerizable monomer represented by the following formula, other polymerizable monomers and a photochromic compound, can be used even under high-temperature and high-humidity conditions without any problems and provides a cured product having excellent photochromic properties. wherein A and A? are each a linear or branched alkylene group having 2 to 15 carbon atoms, “a” is an average value of 1 to 20, when there are a plurality of A's, A's may be the same or different, R1 is a hydrogen atom or methyl group, and R2 is a (meth)acryloyloxy group or hydroxyl group.
    Type: Application
    Filed: February 26, 2014
    Publication date: January 7, 2016
    Applicant: TOKUYAMA CORPORATION
    Inventors: Yasutomo SHIMIZU, Junji TAKENAKA, Junji MOMODA, Katsuhiro MORI
  • Patent number: 9017758
    Abstract: A coating agent composition obtained by mixing fine inorganic oxide particles, a polymerizable alkoxysilane compound, a polymerizing catalyst, an acid aqueous solution and an organic solvent, and satisfying the following conditions (1) to (3): (1) the polymerizing catalyst is at least partly an acetylacetonato complex; (2) a ?-dicarbonyl compound (excluding acetylacetonato complex) having two carbonyl groups in the molecule via a carbon atom, is further contained as a catalyst stabilizer; and (3) the fine inorganic oxide particles and the alkoxysilane compound are contained in a total amount of 23 to 40% by mass.
    Type: Grant
    Filed: March 14, 2005
    Date of Patent: April 28, 2015
    Assignee: Tokuyama Corporation
    Inventors: Noriaki Tahara, Junji Momoda, Katsuhiro Mori
  • Publication number: 20150034887
    Abstract: A novel photochromic compound which develops a color of a neutral tint (double peak characteristic) and has high color optical density, high fading speed and excellent durability. Like a compound represented by the following formula (20), the photochromic compound having a group (methylthio group in the following formula 20) which has a sulfur atom bonded to the 7-position carbon atom is a photochromic compound having high color optical density, high fading speed and excellent durability.
    Type: Application
    Filed: March 11, 2013
    Publication date: February 5, 2015
    Applicant: TOKUYAMA CORPORATION
    Inventors: Shinobu Izumi, Yasutomo Shimizu, Junji Momoda
  • Publication number: 20150030866
    Abstract: A photochromic curable composition containing, as a radically polymerizable monomer component (A), a (meth)acrylic-amide polymerizable monomer (A1) having 2 to 6 (meth)acryloyloxy groups and 2 to 6 divalent amide groups (—NHCO—), and a non-amide polymerizable monomer (A2) having at least 3 radically polymerizable groups but having no amide bond. From the photochromic composition, there can be obtained a photochromic cured body having excellent photochromic properties such as a high color density, a high fading rate, and excellent mechanical strength.
    Type: Application
    Filed: April 17, 2013
    Publication date: January 29, 2015
    Applicant: TOKUYAMA CORPORATION
    Inventors: Shinobu Izumi, Junji Takenaka, Junji Momoda
  • Patent number: 8916071
    Abstract: A chromene compound which has a sulfur-containing substituent represented by the following formula (2) at the 6-position and/or 7-position carbon atom of an indeno(2,1-f)naphtho(1,2-b)pyran structure and is excellent in photochromic properties and stability at a high temperature. In the formula (2), ring X is an aromatic hydrocarbon ring or aromatic heterocyclic ring, R3 and R4 are each independently an alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, heterocyclic group containing a ring member nitrogen atom and bonded to the ring X bonded thereto via the nitrogen atom, halogen atom, aryloxy group or aryl group, and “a” is an integer of 0 to 4.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: December 23, 2014
    Assignee: Tokuyama Corporation
    Inventors: Yasutomo Shimizu, Shinobu Izumi, Junji Takenaka, Junji Momoda
  • Publication number: 20140225050
    Abstract: A chromene compound which has a sulfur-containing substituent represented by the following formula (2) at the 6-position and/or 7-position carbon atom of an indeno (2,1-f)naphtho(1,2-b)pyran structure and is excellent in photochromic properties and stability at a high temperature. (In the above formula, ring X is an aromatic hydrocarbon ring or aromatic heterocyclic ring, R3 and R4 are each independently an alkyl group, haloalkyl group, cycloalkyl group, alkoxy group, amino group, heterocyclic group containing a ring member nitrogen atom and bonded to the ring X bonded thereto via the nitrogen atom, halogen atom, aryloxy group or aryl group, and “a” is an integer of 0 to 4.
    Type: Application
    Filed: September 21, 2012
    Publication date: August 14, 2014
    Applicant: TOKUYAMA CORPORATION
    Inventors: Yasutomo Shimizu, Shinobu Izumi, Junji Takenaka, Junji Momoda
  • Publication number: 20140203226
    Abstract: A photochromic curable composition that contains a (meth)acrylate compound represented by the following formula (1-X1); (wherein Y is an oxygen atom or a divalent group represented by —NH—, R1 and R2 are hydrogen atoms or methyl groups, R3 is an alkylene group having 1 to 6 carbon atoms, R4 is an alkylene group having 1 to 6 carbon atoms, a cycloalkylene group having 3 to 8 carbon atoms and which may include a double bond, or an arylene group having 6 to 10 carbon atoms, and a is a positive number of 1 to 20), other radically polymerizable monomers and a photochromic compound. The invention provides a lens that features excellent durability and high photochromic property free of the problems of turbidity in the surfaces of the lens caused by bleed out or the peeling in the step of production.
    Type: Application
    Filed: October 15, 2012
    Publication date: July 24, 2014
    Applicant: Tokuyama Corporation
    Inventors: Junji Takenaka, Junji Momoda
  • Patent number: 8778236
    Abstract: A novel photochromic compound which develops a color of a neutral tint and has high color optical density, high fading speed and excellent durability. The present invention is a chromene compound having an indeno(2,1-f)naphtho(1,2-b)pyran structure as the basic skeleton in which a hetero ring having two hetero atoms including at least one sulfur atom is directly bonded to the 6-position and the 7-position of the indeno(2,1-f)naphtho(1,2-b)pyran structure via the hetero atom like the compound represented by the following formula (18).
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: July 15, 2014
    Assignee: Tokuyama Corporation
    Inventors: Junji Takenaka, Junji Momoda, Kazuhiro Teranishi, Toshiaki Takahashi, Mitsuyoshi Sando, Shinobu Izumi
  • Publication number: 20140146285
    Abstract: A photochromic curable composition comprising, as radically polymerizable component (A), a silsesquioxane component (A1) having a radically polymerizable group and a bifunctional radically polymerizable monomer (A2) represented by the following general formula (1), wherein a is a number of 0 to 30, and b is a number of 0 to 30 on condition that an average value of a+b is 2 to 30, R1, R2, R3 and R4 are each a hydrogen atom or a methyl group, and A is a divalent organic group on condition that the number of carbon atoms is 1 to 20, and a photochromic compound (B).
    Type: Application
    Filed: July 10, 2012
    Publication date: May 29, 2014
    Applicant: TOKUYAMA CORPORATION
    Inventors: Toshiaki Otani, Junji Takenaka, Junji Momoda, Shinobu Izumi
  • Patent number: 8709308
    Abstract: The chromene compound is represented by the following formula (I), wherein R3 at the 11-position is a sulfur-containing substituent selected from the group consisting of thiol group, alkylthio group, alkoxyalkylthio group, haloalkylthio group, cycloalkylthio group, arylthio group, heteroarylthio group, sulfonyl group and sulfinyl group, R1 and R2 at the 6-position and the 7-position are a combination of an aryl group or a heteroaryl group and an electron donating group having a Hammett constant ?p of ?0.1 or less, or R1 and/or R2 is sulfur-containing substituent selected from thiol group, alkylthio group, alkoxyalkylthio group, haloalkylthio group, cycloalkylthio group, arylthio group and heteroarylthio group.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: April 29, 2014
    Assignee: Tokuyama Corporation
    Inventors: Toshiaki Takahashi, Junji Takenaka, Junji Momoda, Kazuhiro Teranishi, Mitsuyoshi Sando, Shinobu Izumi
  • Patent number: 8691926
    Abstract: A polymerization curable composition prepared by blending specific amounts of a photochromic compound and a specific light stabilizer such as bis(1,2,2,6,6-pentamethyl-4-piperidyl)sebacate with monomer components including a specific bifunctional monomer having a structure that two phenylene groups are bonded together by a specific group, such as 2,2-bis(4-methacryloyloxypolyethoxyphenyl)propane, a polyfunctional polymerizable monomer having a functionality of 3 or more such as trimethylolpropane trimethacrylate, and a monomer other than these in a specific ratio. The polymerization curable composition provides a cured product having excellent photochromic properties such as fast fading rate and sufficiently high drilling strength that allows for its use in rimless spectacles and has high long-term storage stability.
    Type: Grant
    Filed: November 8, 2005
    Date of Patent: April 8, 2014
    Assignee: Tokuyama Corporation
    Inventors: Nobuyuki Tanaka, Junji Momoda
  • Patent number: 8691120
    Abstract: A photochromic chromene compound having an indeno(2,1-f)naphtho(1,2-b)pyran structure as its basic skeleton, an aryl group or a heteroaryl group at the 6-position carbon atom of the structure and an electron donor group having a Hammett constant ?p of not more than ?0.1 at the 7-position carbon atom.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: April 8, 2014
    Assignee: Tokuyama Corporation
    Inventors: Toshiaki Takahashi, Junji Takenaka, Junji Momoda, Mitsuyoshi Sando, Kazuhiro Teranishi
  • Patent number: 8663508
    Abstract: A photochromic curable composition comprising 100 parts by mass of polymerizable monomers which include 70 to 100 mass % of polymerizable monomers having two to four (meth)acrylic groups and 0 to 30 mass % of a polymerizable monomer having one (meth)acrylic group and 0.01 to 20 parts by mass of a photochromic compound, wherein the number of moles of the methacrylic group existent in the polymerizable monomer composition is 3 to 7 times the number of moles of the acrylic group. This composition can provide a lens having a photochromic coating which exhibits excellent photochromic properties, comprises a hard coat layer having sufficiently high adhesion and scratch resistance and has no delay in fading and has excellent storage stability.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: March 4, 2014
    Assignee: Tokuyama Corporation
    Inventors: Junji Takenaka, Junji Momoda
  • Publication number: 20140054520
    Abstract: A novel photochromic compound which develops a color of a neutral tint and has high color optical density, high fading speed and excellent durability. The present invention is a chromene compound having an indeno(2,1-f)naphtho(1,2-b)pyran structure as the basic skeleton in which a hetero ring having two hetero atoms including at least one sulfur atom is directly bonded to the 6-position and the 7-position of the indeno(2,1-f)naphtho(1,2-b)pyran structure via the hetero atom like the compound represented by the following formula (18).
    Type: Application
    Filed: March 7, 2012
    Publication date: February 27, 2014
    Applicant: TOKUYAMA CORPORATION
    Inventors: Junji Takenaka, Junji Momoda, Kazuhiro Teranishi, Toshiaki Takahashi, Mitsuyoshi Sando, Shinobu Izumi
  • Publication number: 20140034884
    Abstract: A chromene compound which develops a color of a neutral tint and has little initial coloration, high double peak characteristic and high color development sensitivity, rarely experiences the reduction of color optical density though it has high fading speed, is excellent in the durability of photochromic properties and can dissolve in a monomer composition which will become a substrate for optical articles in a high concentration, and a photochromic curable composition comprising the chromene compound and polymerizable monomers. The chromene compound is represented by the following formula (1).
    Type: Application
    Filed: January 26, 2012
    Publication date: February 6, 2014
    Applicant: TOKUYAMA CORPORATION
    Inventors: Toshiaki Takahashi, Junji Takenaka, Junji Momoda, Kazuhiro Teranishi, Mitsuyoshi Sando, Shinobu Izumi
  • Publication number: 20140030529
    Abstract: A chromene compound which develops a color of a neutral tint and has high color optical density, high fading speed and excellent durability and a photochromic curable composition comprising the chromene compound and polymerizable monomers. The chromene compound is represented by the following formula (1). (wherein R1 is an aryl group or heteroaryl group, and R2 is a sulfur-containing substituent selected from the group consisting of thiol group, alkylthio group, alkoxyalkylthio group, haloalkylthio group, cycloalkylthio group, arylthio group and heteroarylthio group.
    Type: Application
    Filed: January 25, 2012
    Publication date: January 30, 2014
    Applicant: TOKUYAMA CORPORATION
    Inventors: Toshiaki Takahashi, Junji Takenaka, Junji Momoda, Kazuhiro Teranishi, Shinobu Izumi
  • Patent number: 8529789
    Abstract: A photochromic cured product exhibiting favorable photochromic properties such as a high color density and a large fading rate, and excellent base member properties such as a high hardness, a high heat resistance and a high impact resistance. A curable composition contains a polymerizable monomer which exhibits the L-scale Rockwell hardness of not larger than 40, a bifunctional polymerizable monomer which exhibits the L-scale Rockwell hardness of not smaller than 60, a polyfunctional polymerizable monomer which exhibits the L-scale Rockwell hardness of not smaller than 60, and a photochromic compound.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: September 10, 2013
    Assignee: Tokuyama Corporation
    Inventors: Junji Momoda, Takayoshi Kawasaki, Toshiaki Ohtani
  • Patent number: 8440267
    Abstract: A process for efficiently forming a thick coating layer having a uniform thickness on the surface of a base material having a curved surface. The process comprises the steps of forming a coating film having a predetermined thickness by applying a coating agent containing a polymerizable monomer on the curved surface of a base material, and then curing the coating film in an atmosphere of an oxygen concentration of not more than 500 ppm by photo-polymerization while substantially maintaining the uniformity of the thickness of the coating film. Preferably, the photo-polymerization of the coating film is carried out while rotating the base material at a rotational speed of from 20 to 1500 rpm.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: May 14, 2013
    Assignee: Tokuyama Corporation
    Inventors: Katsuhiro Mori, Junji Momoda, Naoto Takahashi