Patents by Inventor Akihito Otsuka

Akihito Otsuka 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).

  • Patent number: 11807596
    Abstract: The purpose of the present invention is to provide: novel thiol compounds; a method for synthesizing said thiol compounds; curing agents containing said thiol compounds; resin compositions containing said thiol compounds and an epoxy compound; and resin compositions containing said thiol compounds and an ene compound having a carbon-carbon double bond in a molecule. Furthermore, the purpose of the present invention is to provide adhesives and sealants having these resin compositions as ingredients. The thiol compounds of the present invention are represented by chemical formula (I) to chemical formula (VII).
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: November 7, 2023
    Assignee: SHIKOKU CHEMICALS CORPORATION
    Inventors: Naoto Okumura, Akihito Otsuka, Takeshi Kumano, Kazuyuki Fujikawa, Yusuke Araki
  • Patent number: 11702507
    Abstract: This invention provides a material having a low dissipation factor that is suitable for use as an insulating material for a printed wiring board and the like; a resin composition used for the production of the material; and an application using the material. The present invention relates to a resin composition comprising a mono(C6-C20 alkyl)diallyl isocyanurate and a polyphenylene ether resin; a cured product of the resin composition; and use of the cured product.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: July 18, 2023
    Assignee: SHIKOKU CHEMICALS CORPORATION
    Inventors: Akihito Otsuka, Takashi Kashiwabara, Kazunori Aoki, Takeshi Kumano
  • Publication number: 20220185960
    Abstract: This invention provides a material having a low dissipation factor that is suitable for use as an insulating material for a printed wiring board and the like; a resin composition used for the production of the material; and an application using the material. The present invention relates to a resin composition comprising a mono(C6-C20 alkyl)diallyl isocyanurate and a polyphenylene ether resin; a cured product of the resin composition; and use of the cured product.
    Type: Application
    Filed: March 26, 2020
    Publication date: June 16, 2022
    Applicant: SHIKOKU CHEMICALS CORPORATION
    Inventors: Akihito OTSUKA, Takashi KASHIWABARA, Kazunori AOKI, Takeshi KUMANO
  • Patent number: 10913731
    Abstract: The purpose of the present invention is to provide: a novel curable compound which can be expected to be used as a raw material for photocurable resins and thermosetting resins; a method for synthesizing said compound; a resin composition containing said compound; and a cured product thereof. This compound is an epoxy-oxetane compound represented by a formula, and this compound has a structure in which two epoxycyclohexyl groups (groups in which an oxirane ring and a cyclohexane ring are condensed) are bonded to an oxetane ring via a connector having one ether bond. In formula (I?), R1 to R3 may be the same as, or different from, each other, and each denote a hydrogen atom or a methyl group. n is 1 or 2.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: February 9, 2021
    Assignee: SHIKOKU CHEMICALS CORPORATION
    Inventors: Kazunori Aoki, Naoto Okumura, Takashi Kashiwabara, Yusuke Araki, Akihito Otsuka, Takeshi Kumano
  • Publication number: 20200369606
    Abstract: The purpose of the present invention is to provide: novel thiol compounds; a method for synthesizing said thiol compounds; curing agents containing said thiol compounds; resin compositions containing said thiol compounds and an epoxy compound; and resin compositions containing said thiol compounds and an ene compound having a carbon-carbon double bond in a molecule. Furthermore, the purpose of the present invention is to provide adhesives and sealants having these resin compositions as ingredients. The thiol compounds of the present invention are represented by chemical formula (I) to chemical formula (VII).
    Type: Application
    Filed: October 25, 2018
    Publication date: November 26, 2020
    Applicant: SHIKOKU CHEMICALS CORPORATION
    Inventors: Naoto OKUMURA, Akihito OTSUKA, Takeshi KUMANO, Kazuyuki FUJIKAWA, Yusuke ARAKI
  • Publication number: 20200270236
    Abstract: The purpose of the present invention is to provide: a novel curable compound which can be expected to be used as a raw material for photocurable resins and thermosetting resins; a method for synthesizing said compound; a resin composition containing said compound; and a cured product thereof. This compound is an epoxy-oxetane compound represented by a formula, and this compound has a structure in which two epoxycyclohexyl groups (groups in which an oxirane ring and a cyclohexane ring are condensed) are bonded to an oxetane ring via a connector having one ether bond. In formula (I?), R1 to R3 may be the same as, or different from, each other, and each denote a hydrogen atom or a methyl group. n is 1 or 2.
    Type: Application
    Filed: October 15, 2018
    Publication date: August 27, 2020
    Applicant: SHIKOKU CHEMICALS CORPORATION
    Inventors: Kazunori AOKI, Naoto OKUMURA, Takashi KASHIWABARA, Yusuke ARAKI, Akihito OTSUKA, Takeshi KUMANO
  • Patent number: D469098
    Type: Grant
    Filed: May 2, 2002
    Date of Patent: January 21, 2003
    Assignee: Teac Corporation
    Inventor: Akihito Otsuka
  • Patent number: D486131
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: February 3, 2004
    Assignee: Nexgen Mediatech Inc.
    Inventor: Akihito Otsuka