Patents by Inventor Masakatsu Hotta

Masakatsu Hotta 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: 20230159708
    Abstract: An self-adhesive millable silicone rubber composition contains: 100 parts by mass of (A) an organopolysiloxane having at least two alkenyl groups bonded to silicon atoms per molecule and an average polymerization degree of 100 or more; 5 to 50 parts by mass of (B) a reinforcing silica having a specific surface area of 50 m2/g or more; 0.1 to 5 parts by mass of (C) an organosilicon compound having epoxy and alkoxy groups per molecule; 0.1 to 5 parts by mass of (D) an organosilicon compound having isocyanate group and alkoxy groups per molecule; and an effective curing amount of (E) a curing agent. The content of an organosilicon compound having a siloxane bond and benzene ring per molecule is 0 to 0.1 parts by mass, and the content of an organosilicon compound having a siloxane bond and an epoxy group per molecule is 0 to 0.1 parts by mass.
    Type: Application
    Filed: February 25, 2021
    Publication date: May 25, 2023
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Masakatsu HOTTA
  • Patent number: 11283374
    Abstract: A method is provided for manufacturing a dielectric elastomer transducer including a dielectric elastomer layer and electrode layers sandwiching the elastomer layer. The elastomer layer when stretched exhibits a stress-strain curve having: a low strain and high elasticity region; a low elasticity region; and a high strain region. The method includes: a pre-stretching process to reduce hysteresis in elastic behavior of the elastomer layer by stretching the elastomer layer one or more times under a load as heavy as a first load before the electrodes are provided, each stretching causing the elastomer layer to undergo a tension falling in the low elasticity region; and a dielectric elastomer layer fixing process including applying a second load smaller than the first load to the elastomer layer so as to fix the elastomer layer to a support member under a second tension smaller than the first tension.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: March 22, 2022
    Assignees: ZEON CORPORATION
    Inventors: Seiki Chiba, Mikio Waki, Masakatsu Hotta, Kazuhiro Oishi
  • Publication number: 20210058013
    Abstract: A method is provided for manufacturing a dielectric elastomer transducer including a dielectric elastomer layer and electrode layers sandwiching the elastomer layer. The elastomer layer when stretched exhibits a stress-strain curve having: a low strain and high elasticity region; a low elasticity region; and a high strain region. The method includes: a pre-stretching process to reduce hysteresis in elastic behavior of the elastomer layer by stretching the elastomer layer one or more times under a load as heavy as a first load before the electrodes are provided, each stretching causing the elastomer layer to undergo a tension falling in the low elasticity region; and a dielectric elastomer layer fixing process including applying a second load smaller than the first load to the elastomer layer so as to fix the elastomer layer to a support member under a second tension smaller than the first tension.
    Type: Application
    Filed: January 11, 2019
    Publication date: February 25, 2021
    Applicants: ZEON CORPORATION
    Inventors: Seiki CHIBA, Mikio WAKI, Masakatsu HOTTA, Kazuhiro OISHI
  • Publication number: 20200140659
    Abstract: A cellulose nanofiber-supporting inorganic powder includes a cellulose nanofiber and an inorganic powder, wherein the cellulose nanofiber is supported on the inorganic powder. Thus, the cellulose nanofiber may be readily and uniformly dispersed in a resin or rubber composition, and, by adding to the composition, a cellulose nanofiber-supporting inorganic powder is capable of improving the physical properties of a resin or a rubber.
    Type: Application
    Filed: May 31, 2018
    Publication date: May 7, 2020
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Masakatsu HOTTA, Masanobu NISHIMINE, Tomoya OGATA, Susumu UENO, Masaki TANAKA
  • Patent number: 10584227
    Abstract: Disclosed herein are a silicone rubber composition and a power cable. The silicone rubber composition has excellent insulation properties and a high permittivity and which can further become a silicone dielectric material having a low specific gravity and a high strength. The power cable in which a terminal connection part or an intermediate connection part is composed of a cured molded product of the just-mentioned composition. The silicone rubber composition includes (A) 100 parts by weight of an organopolysiloxane containing at least two Si-bonded alkenyl groups in one molecule thereof, (B) 5 to 50 parts by weight of a reinforcing silica having a specific surface area measured by a BET method of 50 m2/g to 400 m2/g, (C) 0.3 to 3 parts by weight of carbon nanotubes having an average diameter of 0.5 nm to 50 nm, and (D) a curing agent in an amount necessary for curing of the composition.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: March 10, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Masakatsu Hotta, Kazuhiro Oishi, Yoshiaki Koike
  • Publication number: 20170081499
    Abstract: Disclosed herein are a silicone rubber composition and a power cable. The silicone rubber composition has excellent insulation properties and a high permittivity and which can further become a silicone dielectric material having a low specific gravity and a high strength. The power cable in which a terminal connection part or an intermediate connection part is composed of a cured molded product of the just-mentioned composition. The silicone rubber composition includes (A) 100 parts by weight of an organopolysiloxane containing at least two Si-bonded alkenyl groups in one molecule thereof, (B) 5 to 50 parts by weight of a reinforcing silica having a specific surface area measured by a BET method of 50 m2/g to 400 m2/g, (C) 0.3 to 3 parts by weight of carbon nanotubes having an average diameter of 0.5 nm to 50 nm, and (D) a curing agent in an amount necessary for curing of the composition.
    Type: Application
    Filed: September 2, 2016
    Publication date: March 23, 2017
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Masakatsu HOTTA, Kazuhiro OISHI, Yoshiaki KOIKE
  • Publication number: 20170005347
    Abstract: A sealing material for solid polymer fuel cells that includes a silicone rubber composition and, compounded therewith, a layered double hydroxide has an excellent resistance to hydrofluoric acid.
    Type: Application
    Filed: June 29, 2016
    Publication date: January 5, 2017
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventor: Masakatsu HOTTA
  • Publication number: 20160369143
    Abstract: The present invention relates to a silicone rubber composition comprising: (A) 100 parts by mass of an organopolysiloxane that has a degree of polymerization of 100 or more and contains at least two alkenyl groups each bound to a silicon atom in the molecule; (B) 10 to 100 parts by mass of a reinforcing silica having a specific surface area (BET method) of 50 m2/g or more; (C) 1 to 100 parts by mass of calcined mica having an average particle diameter of 20 ?m or less; and (D) an effective amount of a curing agent. According to the present invention, even when a silicone rubber molded article is exposed to flame for a long time, ash of the silicone rubber molded article after firing is sintered (is transformed into a ceramic material) and the shape of the silicone rubber molded article before the firing (sintering) can be maintained. In addition, the rolling properties (workability) in a kneading step in the production of the silicone rubber composition is excellent.
    Type: Application
    Filed: May 21, 2014
    Publication date: December 22, 2016
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Osamu HAYASHIDA, Masakatsu HOTTA, Yoshiaki KOIKE, Atsuhito KASHIMA
  • Patent number: 9352719
    Abstract: An airbag device including an inflator, an airbag and a silicone rubber sheet. The silicone rubber sheet is used for a flow passage to feed gas from an inflator to an airbag and is produced by stacking 0.5 mm or more of silicone composition comprising: 100 parts by weight of organopolysiloxane which is represented by the following average composition formula R1SiO(4-n)/2, where in the formula, R1 represents a substituted or unsubstituted monovalent hydrocarbon group and n represents a positive number of 1.95 to 2.05, and which exhibits an average degree of polymerization of 1,000 or more; 20 to 80 parts by weight of reinforcing silica powder having a specific surface area of 50 m2/g or more; and a curing agent on at least an inner surface of a fiber fabric constituting the flow passage and performing heat curing.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: May 31, 2016
    Assignees: TAKATA CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Kenji Nakamura, Shuichiro Miyata, Masakatsu Hotta, Tsutomu Yoneyama, Masaki Fukuda
  • Publication number: 20150123387
    Abstract: An airbag device including an inflator, an airbag and a silicone rubber sheet. The silicone rubber sheet is used for a flow passage to feed gas from an inflator to an airbag and is produced by stacking 0.5 mm or more of silicone composition comprising: 100 parts by weight of organopolysiloxane which is represented by the following average composition formula R1SiO(4-n)/2, where in the formula, R1 represents a substituted or unsubstituted monovalent hydrocarbon group and n represents a positive number of 1.95 to 2.05, and which exhibits an average degree of polymerization of 1,000 or more; 20 to 80 parts by weight of reinforcing silica powder having a specific surface area of 50 m2/g or more; and a curing agent on at least an inner surface of a fiber fabric constituting the flow passage and performing heat curing.
    Type: Application
    Filed: April 29, 2013
    Publication date: May 7, 2015
    Applicants: SHIN-ETSU CHEMICAL CO., LTD, TAKATA CORPORATION
    Inventors: Kenji Nakamura, Shuichiro Miyata, Masakatsu Hotta, Tsutomu Yoneyama, Masaki Fukuda
  • Publication number: 20150000738
    Abstract: A solar cell module is provided comprising a first substrate (1a), a thin-film solar cell (2) comprising a metal electrode layer, a photoelectric conversion layer, and a light-transmissive electrode layer disposed on the first substrate (1a), a transparent second substrate (1b) opposed to the solar cell on the first substrate, a light-transmissive silicone gel layer (3) interposed between the first and second substrates, and a seal (4?) of a water vapor non-permeable, rubber-based thermoplastic sealing material surrounding the outer periphery of the silicone gel layer. The module has long-term reliability and high efficiency.
    Type: Application
    Filed: June 17, 2014
    Publication date: January 1, 2015
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Atsuo Ito, Tomoyoshi Furihata, Hiroto Ohwada, Hyung Bae Kim, Atsushi Yaginuma, Naoki Yamakawa, Minoru Igarashi, Masakatsu Hotta, Tsutomu Nakamura
  • Publication number: 20140234754
    Abstract: In a fuel cell separator comprising a separator substrate, a first primer layer, a second primer layer, and an elastomeric seal layer, the first primer layer is formed by firing an organometallic compound, the second primer layer is formed by firing an organosilicon compound having a Si—H group, and the elastomeric seal layer is formed by curing a liquid addition-curable silicone rubber composition comprising an alkenyl-containing base polymer and an Si—H group-containing crosslinker.
    Type: Application
    Filed: February 7, 2014
    Publication date: August 21, 2014
    Applicants: Shin-Etsu Chemical Co., Ltd., HONDA MOTOR CO., LTD.
    Inventors: Satoru TERADA, Daisuke OKONOGI, Masakatsu HOTTA
  • Publication number: 20140150844
    Abstract: Disclosed is a connection sheet for a solar battery cell electrode, which is a polymer sheet for use in the connection between an electrode for extracting an electric power from a solar battery cell and a wiring member through an electrically conductive adhesive material by heating and pressurizing, and which is intercalated between a heating/pressurizing member and the wiring member upon use.
    Type: Application
    Filed: February 5, 2014
    Publication date: June 5, 2014
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Syuichi AZECHI, Ikuo SAKURAI, Masakatsu HOTTA, Takeshi HASHIMOTO
  • Publication number: 20140014182
    Abstract: The present invention relates to a solar cell module which is characterized in that: a light-transmitting elastomer member and a solar cell element are arranged in a space between a panel of a transparent member upon which sunlight is incident and a panel of a thermally conductive member which is arranged on the side opposite to the sunlight incidence side in such a manner that the light-transmitting elastomer member is closer to the sunlight incidence side; and the solar cell element is pressed by the light-transmitting elastomer member toward the panel of a thermally conductive member so that the solar cell element is compression bonded thereto. This solar cell module is most suitable as a solar cell module that has excellent heat dissipation of a cell, the temperature of which is increased due to sunlight or a hot spot, and a structure that suppresses the production cost.
    Type: Application
    Filed: May 31, 2012
    Publication date: January 16, 2014
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tomoyoshi Furihata, Atsuo Ito, Hyung-Bae Kim, Minoru Igarashi, Masakatsu Hotta, Tsutomu Nakamura
  • Publication number: 20120012153
    Abstract: Disclosed is a connection sheet for a solar battery cell electrode, which is a polymer sheet for use in the connection between an electrode for extracting an electric power from a solar battery cell and a wiring member through an electrically conductive adhesive material by heating and pressurizing, and which is intercalated between a heating/pressurizing member and the wiring member upon use.
    Type: Application
    Filed: March 5, 2010
    Publication date: January 19, 2012
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Syuichi Azechi, Ikuo Sakurai, Masakatsu Hotta, Takeshi Hashimoto