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).
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Patent number: 11597874Abstract: 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: GrantFiled: March 22, 2019Date of Patent: March 7, 2023Assignee: TOKUYAMA CORPORATIONInventors: Ayako Ohara, Junji Takenaka, Junji Momoda
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Patent number: 11578174Abstract: 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: GrantFiled: October 10, 2019Date of Patent: February 14, 2023Assignee: Tokuyama CorporationInventors: Yasutomo Shimizu, Katsuhiro Mori, Junji Momoda, Hiromasa Yamamoto
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Publication number: 20220244428Abstract: 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: ApplicationFiled: June 27, 2019Publication date: August 4, 2022Applicants: MENICON CO., LTD., TOKUYAMA CORPORATIONInventors: Tomomi TOMIDA, Kazuhiko NAKADA, Masaki BABA, Satomu NIIDA, Junji MOMODA, Masayuki MIYAZAKI, Junji TAKENAKA
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Publication number: 20220213050Abstract: 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: ApplicationFiled: June 8, 2020Publication date: July 7, 2022Applicant: TOKUYAMA CORPORATIONInventors: Masayuki MIYAZAKI, Junji TAKENAKA, Junji MOMODA
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Publication number: 20220162486Abstract: 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: ApplicationFiled: April 3, 2020Publication date: May 26, 2022Applicant: TOKUYAMA CORPORATIONInventors: Katsuhiro MORI, Takao NOGUCHI, Junji MOMODA
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Publication number: 20220056187Abstract: 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: ApplicationFiled: December 17, 2019Publication date: February 24, 2022Applicant: TOKUYAMA CORPORATIONInventors: Taichi HANASAKI, Ayako OHARA, Junji TAKENAKA, Junji MOMODA
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Publication number: 20220056170Abstract: 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: ApplicationFiled: December 17, 2019Publication date: February 24, 2022Applicant: TOKUYAMA CORPORATIONInventors: Ayako OHARA, Taichi HANASAKI, Junji TAKENAKA, Junji MOMODA
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Publication number: 20220049037Abstract: 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: ApplicationFiled: December 17, 2019Publication date: February 17, 2022Applicant: TOKUYAMA CORPORATIONInventors: Ayako OHARA, Taichi HANASAKI, Junji TAKENAKA, Junji MOMODA
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Patent number: 11186600Abstract: 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: GrantFiled: March 14, 2019Date of Patent: November 30, 2021Assignee: TOKUYAMA CORPORATIONInventors: Takayoshi Kawasaki, Junji Momoda, Tomohiro Kawamura, Mayumi Kishi, Michihito Nakatani
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Publication number: 20210292641Abstract: 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: ApplicationFiled: July 18, 2019Publication date: September 23, 2021Applicant: TOKUYAMA CORPORATIONInventors: Takao NOGUCHI, Junji TAKENAKA, Junji MOMODA, Takayoshi KAWASAKI, Yasutomo SHIMIZU, Masayuki MIYAZAKI
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Patent number: 11066523Abstract: 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: GrantFiled: June 18, 2018Date of Patent: July 20, 2021Assignee: TOKUYAMA CORPORATIONInventors: Junji Takenaka, Junji Momoda, Takayoshi Kawasaki, Takao Noguchi, Yasutomo Shimizu, Masayuki Miyazaki
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Publication number: 20210155830Abstract: 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: ApplicationFiled: April 4, 2019Publication date: May 27, 2021Applicant: TOKUYAMA CORPORATIONInventors: Toshimitsu HIRAREN, Katsuhiro MORI, Junji MOMODA
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Publication number: 20210108113Abstract: 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: ApplicationFiled: April 8, 2019Publication date: April 15, 2021Applicant: TOKUYAMA CORPORATIONInventors: Katsuhiro Mori, Junji Momoda
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Publication number: 20210070790Abstract: 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: ApplicationFiled: March 14, 2019Publication date: March 11, 2021Applicant: TOKUYAMA CORPORATIONInventors: Takayoshi KAWASAKI, Junji MOMODA, Tomohiro KAWAMURA, Mayumi KISHI, Michihito NAKATANI
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Patent number: 10920007Abstract: 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: GrantFiled: November 16, 2017Date of Patent: February 16, 2021Assignee: TOKUYAMA CORPORATIONInventors: Yasutomo Shimizu, Takayoshi Kawasaki, Junji Momoda, Mitsuki Tochi
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Publication number: 20210002545Abstract: 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: ApplicationFiled: March 22, 2019Publication date: January 7, 2021Applicant: TOKUYAMA CORPORATIONInventors: Ayako OHARA, Junji TAKENAKA, Junji MOMODA
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Publication number: 20210003867Abstract: 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: ApplicationFiled: March 19, 2019Publication date: January 7, 2021Applicant: TOKUYAMA CORPORATIONInventors: Junji TAKENAKA, Junji MOMODA, Yoshihiro ASAHARA, Takashi TAMUKAI
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Patent number: 10884334Abstract: 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: GrantFiled: November 10, 2016Date of Patent: January 5, 2021Assignee: TOKUYAMA CORPORATIONInventors: Masayuki Miyazaki, Junji Momoda, Junji Takenaka, Takashi Tamukai
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Publication number: 20200386915Abstract: 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: ApplicationFiled: February 19, 2019Publication date: December 10, 2020Applicant: TOKUYAMA CORPORATIONInventors: Katsuhiro MORI, Toshimitsu HIRAREN, Junji MOMODA
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Publication number: 20200283662Abstract: 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: ApplicationFiled: June 7, 2017Publication date: September 10, 2020Applicant: TOKUYAMA CORPORATIONInventors: Katsuhiro MORI, Toshimitsu HIRAREN, Junji MOMODA