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).
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Publication number: 20230159708Abstract: 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: ApplicationFiled: February 25, 2021Publication date: May 25, 2023Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventor: Masakatsu HOTTA
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Patent number: 11283374Abstract: 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: GrantFiled: January 11, 2019Date of Patent: March 22, 2022Assignees: ZEON CORPORATIONInventors: Seiki Chiba, Mikio Waki, Masakatsu Hotta, Kazuhiro Oishi
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Publication number: 20210058013Abstract: 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: ApplicationFiled: January 11, 2019Publication date: February 25, 2021Applicants: ZEON CORPORATIONInventors: Seiki CHIBA, Mikio WAKI, Masakatsu HOTTA, Kazuhiro OISHI
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Publication number: 20200140659Abstract: 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: ApplicationFiled: May 31, 2018Publication date: May 7, 2020Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Masakatsu HOTTA, Masanobu NISHIMINE, Tomoya OGATA, Susumu UENO, Masaki TANAKA
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Patent number: 10584227Abstract: 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: GrantFiled: September 2, 2016Date of Patent: March 10, 2020Assignee: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Masakatsu Hotta, Kazuhiro Oishi, Yoshiaki Koike
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Publication number: 20170081499Abstract: 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: ApplicationFiled: September 2, 2016Publication date: March 23, 2017Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Masakatsu HOTTA, Kazuhiro OISHI, Yoshiaki KOIKE
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Publication number: 20170005347Abstract: 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: ApplicationFiled: June 29, 2016Publication date: January 5, 2017Applicant: Shin-Etsu Chemical Co., Ltd.Inventor: Masakatsu HOTTA
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Publication number: 20160369143Abstract: 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: ApplicationFiled: May 21, 2014Publication date: December 22, 2016Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Osamu HAYASHIDA, Masakatsu HOTTA, Yoshiaki KOIKE, Atsuhito KASHIMA
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Patent number: 9352719Abstract: 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: GrantFiled: April 29, 2013Date of Patent: May 31, 2016Assignees: TAKATA CORPORATION, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Kenji Nakamura, Shuichiro Miyata, Masakatsu Hotta, Tsutomu Yoneyama, Masaki Fukuda
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Publication number: 20150123387Abstract: 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: ApplicationFiled: April 29, 2013Publication date: May 7, 2015Applicants: SHIN-ETSU CHEMICAL CO., LTD, TAKATA CORPORATIONInventors: Kenji Nakamura, Shuichiro Miyata, Masakatsu Hotta, Tsutomu Yoneyama, Masaki Fukuda
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Publication number: 20150000738Abstract: 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: ApplicationFiled: June 17, 2014Publication date: January 1, 2015Applicant: 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
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Publication number: 20140234754Abstract: 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: ApplicationFiled: February 7, 2014Publication date: August 21, 2014Applicants: Shin-Etsu Chemical Co., Ltd., HONDA MOTOR CO., LTD.Inventors: Satoru TERADA, Daisuke OKONOGI, Masakatsu HOTTA
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Publication number: 20140150844Abstract: 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: ApplicationFiled: February 5, 2014Publication date: June 5, 2014Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Syuichi AZECHI, Ikuo SAKURAI, Masakatsu HOTTA, Takeshi HASHIMOTO
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Publication number: 20140014182Abstract: 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: ApplicationFiled: May 31, 2012Publication date: January 16, 2014Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Tomoyoshi Furihata, Atsuo Ito, Hyung-Bae Kim, Minoru Igarashi, Masakatsu Hotta, Tsutomu Nakamura
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Publication number: 20120012153Abstract: 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: ApplicationFiled: March 5, 2010Publication date: January 19, 2012Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Syuichi Azechi, Ikuo Sakurai, Masakatsu Hotta, Takeshi Hashimoto