Patents by Inventor Masataka Nakanishi

Masataka Nakanishi 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: 20210206907
    Abstract: Provided are an epoxy resin composition, a prepreg, a resin sheet, and a carbon fiber-reinforced composite material, which have high heat resistance, a high elastic modulus, low water absorption, and excellent flame resistance. This epoxy resin is a para-cresol novolac epoxy resin represented by General formula (1), in which a content ratio of components represented by n=1 as measured by gel permeation chromatography is less than 10% by area, and a content ratio of components represented by n=2 as measured by gel permeation chromatography is at least 1% by area and less than 40% by area. (In the formula, plural R's each independently represent a C1-6 alkyl group, n represents a real number of 1 to 10, and G represents a substituted or unsubstituted glycidyl group.
    Type: Application
    Filed: July 23, 2019
    Publication date: July 8, 2021
    Applicant: NIPPONKAYAKU KABUSHIKI KAISHA
    Inventors: Yusuke KAWANO, Masataka NAKANISHI, Kazuma INOUE
  • Patent number: 10476073
    Abstract: A production process for carbon-coated silicon material includes the step of: heating CaSi2 and a halogen-containing polymer at a temperature being a carbonization temperature or more of the halogen-containing polymer in a state where the CaSi2 and the halogen-containing polymer coexist.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: November 12, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Hiroki Oshima, Takashi Mohri, Nobuhiro Goda, Masataka Nakanishi
  • Patent number: 10347910
    Abstract: A nano silicon material having reduced amounts of oxygen (O) and chlorine (Cl) contained therein is provided. The nano silicon material contains fluorine (F) and nano-sized silicon crystallites. Generation of a layer in which oxygen (O) and chlorine (Cl) are present is suppressed due to the presence of fluorine (F), so that a decrease in the moving speed of lithium ions is suppressed. In addition, due to the presence of fluorine (F), the concentrations of oxygen (O) and chlorine (Cl) are reduced, so that reaction thereof with lithium ions is suppressed.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: July 9, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takeshi Kondo, Yusuke Sugiyama, Nobuhiro Goda, Takashi Mohri, Hiroki Oshima, Masataka Nakanishi
  • Publication number: 20190203048
    Abstract: To provide a maleimide resin composition which is curable by a curing process equivalent to that of an epoxy resin and can achieve moldability (curability) at 200° C. or less, heat resistance of 250° C. or more, retention of high thermal stability and high elastic modulus at 250° C., and low dielectric constant/low dielectric loss tangent.
    Type: Application
    Filed: August 2, 2017
    Publication date: July 4, 2019
    Inventors: Kazuki Matsuura, Masataka Nakanishi, Kenichi Kuboki
  • Patent number: 10333139
    Abstract: Provided is a negative electrode active material including complex particles formed of: nano silicon aggregated particles produced by heating a layered polysilane represented by a composition formula of (SiH)n and having a structure in which multiple six-membered rings formed from silicon atoms are connected; and a composited carbon layer formed from an amorphous carbon and at least covering one portion of the aggregated particles. A mean particle diameter D50 of the aggregated particles is within a range of 0.2 ?m to 30 ?m, and a mean particle diameter D50 of the complex particles is within a range of 0.5 ?m to 40 ?m.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: June 25, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takeshi Kondo, Tomohiro Niimi, Yusuke Sugiyama, Masataka Nakanishi, Nobuhiro Goda
  • Patent number: 10230100
    Abstract: A negative-electrode active material is used for a negative electrode, the negative-electrode active material including: agglomerated particles including nanometer-size silicon produced by heat treating a lamellar polysilane having a structure in which multiple six-membered rings constituted of a silicon atom are disposed one after another, and expressed by a compositional formula, (SiH)n; and a carbon layer including amorphous carbon, and covering at least some of the agglomerated particles to be composited therewith. An electric storage apparatus including the same is not only able to reduce the irreversible capacity, but also able to inhibit the generation of “SEI.
    Type: Grant
    Filed: December 25, 2013
    Date of Patent: March 12, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yusuke Sugiyama, Masataka Nakanishi, Nobuhiro Goda, Tomohiro Niimi, Masakazu Murase, Takeshi Kondo, Shigenori Koishi, Hiroshi Hirate, Yoshihiro Nakagaki, Mutsumi Takahashi
  • Patent number: 10217990
    Abstract: A silicon material useful as a negative electrode active material is provided. The silicon material has an Si/O atom ratio within a range of greater than 1/0.5 and not greater than 1/0.1 and a band gap within a range of greater than 1.1 eV and not greater than 2.1 eV. A secondary battery in which this silicon material is used as a negative electrode active material has long life.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: February 26, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takashi Mohri, Masanori Harata, Masataka Nakanishi, Hiroki Oshima, Nobuhiro Goda
  • Patent number: 10164255
    Abstract: A silicon material useful as a negative electrode active material is provided. The silicon material has a band gap within a range of greater than 1.1 eV and not greater than 1.7 eV. A secondary battery in which this silicon material is used as a negative electrode active material has improved initial efficiency.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: December 25, 2018
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takashi Mohri, Masataka Nakanishi, Hiroki Oshima, Masanori Harata, Nobuhiro Goda
  • Patent number: 9997772
    Abstract: Providing a negative-electrode material for nonaqueous-electrolyte secondary battery, the negative-electrode material including lithium silicate particles coated by a carbonaceous substance, a production process for the same, a negative electrode for nonaqueous-electrolyte secondary battery, and a nonaqueous-electrolyte secondary battery. A negative-electrode material for nonaqueous-electrolyte secondary battery includes lithium silicate particles having a surface at least some of which is coated by a carbonaceous substance formed by heating a carbon-containing compound at a thermal decomposition temperature of the carbon-containing compound or more and 1,100±° C. or less, the carbon-containing compound being a solid at ordinary temperature and exhibiting a zeta-potential absolute value being 60 or more against N-methyl-2-pyrrolidone (or NMP).
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: June 12, 2018
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Tomohiro Niimi, Yusuke Sugiyama, Nagisa Watanabe, Kazuhito Kawasumi, Masakazu Murase, Masataka Nakanishi
  • Publication number: 20170369636
    Abstract: There are provided an aromatic amine resin represented by the following formula (1) wherein a plurality of R1's each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, provided that a case where all R1's represent each a hydrogen atom is excluded, m represents an integer of 1 to 4, n represents an integer, and the average value (A) of n represents: 1?A?5, which can be utilized for a high-reliability semiconductor, a high-performance fiber-reinforced composite material, and others; an epoxy resin composition containing the aromatic amine resin; and an epoxy resin cured product having properties excellent in high heat resistance and low hygroscopicity, which is obtained by curing the epoxy resin composition.
    Type: Application
    Filed: January 20, 2016
    Publication date: December 28, 2017
    Inventors: Kenichi Kuboki, Masataka Nakanishi
  • Patent number: 9831494
    Abstract: A negative-electrode active material is provided, the negative-electrode active material including: a lamellar polysilane having a structure in which multiple six-membered rings constituted of a silicon atom are disposed one after another, and expressed by a compositional formula, (SiH)n, as a basic skeleton; and the negative-electrode active material containing copper in an amount of from 0.01 to 50% by mass. To contain copper results in upgrading electron conductivity. Consequently, an electric storage apparatus using the negative-electrode active material for one of the negative electrodes has upgraded rate characteristic, and also has augmented charged and discharged capacities.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: November 28, 2017
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Masataka Nakanishi, Yusuke Sugiyama, Takashi Mori, Hiroshi Hirate, Masakazu Murase
  • Patent number: 9777107
    Abstract: An epoxy resin represented by the following formula (1) wherein R1 represents an alkylene group having 2 to 6 carbon atoms and optionally containing an ester or ether bond; R2 represents a monovalent aliphatic hydrocarbon group having 1 to 6 carbon atoms or a monovalent aromatic hydrocarbon group having 6 to 12 carbon atoms; R3 represents an oxygen atom or a phenylene group; k represents 1 to 10 as an average value; m represents an integer of 0 to 2; n represents 0 to 10 as an average value; and a plurality of groups R1, R2, R3, k, or m present in the formula may be the same or different from each other.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: October 3, 2017
    Assignees: Shin-Etsu Chemical Co., Ltd., Nippon Kayaku Kabushiki Kaisha
    Inventors: Toshio Shiobara, Junichi Sawada, Miyuki Wakao, Tsutomu Kashiwagi, Naofusa Miyagawa, Yoshihiro Kawada, Chie Sasaki, Masataka Nakanishi, Kenichi Kuboki
  • Publication number: 20170256793
    Abstract: A production process for carbon-coated silicon material includes the step of: heating CaSi2 and a halogen-containing polymer at a temperature being a carbonization temperature or more of the halogen-containing polymer in a state where the CaSi2 and the halogen-containing polymer coexist.
    Type: Application
    Filed: August 4, 2015
    Publication date: September 7, 2017
    Applicant: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Hiroki OSHIMA, Takashi MOHRI, Nobuhiro GODA, Masataka NAKANISHI
  • Publication number: 20170200947
    Abstract: A silicon material useful as a negative electrode active material is provided. The silicon material has a band gap within a range of greater than 1.1 eV and not greater than 1.7 eV. A secondary battery in which this silicon material is used as a negative electrode active material has improved initial efficiency.
    Type: Application
    Filed: May 26, 2015
    Publication date: July 13, 2017
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takashi MOHRI, Masataka NAKANISHI, Hiroki OSHIMA, Masanori HARATA, Nobuhiro GODA
  • Publication number: 20170200948
    Abstract: A nano silicon material having reduced amounts of oxygen (O) and chlorine (Cl) contained therein is provided. The nano silicon material contains fluorine (F) and nano-sized silicon crystallites. Generation of a layer in which oxygen (O) and chlorine (Cl) are present is suppressed due to the presence of fluorine (F), so that a decrease in the moving speed of lithium ions is suppressed. In addition, due to the presence of fluorine (F), the concentrations of oxygen (O) and chlorine (Cl) are reduced, so that reaction thereof with lithium ions is suppressed.
    Type: Application
    Filed: May 26, 2015
    Publication date: July 13, 2017
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takeshi KONDO, Yusuke SUGIYAMA, Nobuhiro GODA, Takashi MOHRI, Hiroki OSHIMA, Masataka NAKANISHI
  • Publication number: 20170194623
    Abstract: A silicon material useful as a negative electrode active material is provided. The silicon material has an Si/O atom ratio within a range of greater than 1/0.5 and not greater than 1/0.1 and a band gap within a range of greater than 1.1 eV and not greater than 2.1 eV. A secondary battery in which this silicon material is used as a negative electrode active material has long life.
    Type: Application
    Filed: May 26, 2015
    Publication date: July 6, 2017
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takashi MOHRI, Masanori HARATA, Masataka NAKANISHI, Hiroki OSHIMA, Nobuhiro GODA
  • Publication number: 20170145150
    Abstract: To provide an epoxy resin composition that is suitable for producing optical sheets which exhibit excellent transparency, heat resistance, strength, smoothness and light resistance, and a cured product thereof. An epoxy resin composition for optical3 sheets, the composition comprising a polyvalent carboxylic acid (A) represented by formula (I): (wherein, R1's each independently represent a hydrogen atom, an alkyl group having 1 to 15 carbon atoms, or a carboxyl group; q represents the number of substituent R1's, and represents an integer from 1 to 4; and P represents any one of the following x, y and z): (wherein, there may be a plural number of R2's per ring, and R2's each independently represent a hydrogen atom or a methyl group; and * represents a bonding site linked to the oxygen atom; y.
    Type: Application
    Filed: February 8, 2017
    Publication date: May 25, 2017
    Inventors: Noriko Kiyoyanagi, Masataka Nakanishi, Yoshihiro Kawata, Junko Ichikawa, Toru Kurihashi
  • Publication number: 20170033355
    Abstract: Provided is a negative electrode active material including complex particles formed of: nano silicon aggregated particles produced by heating a layered polysilane represented by a composition formula of (SiH)n and having a structure in which multiple six-membered rings formed from silicon atoms are connected; and a composited carbon layer formed from an amorphous carbon and at least covering one portion of the aggregated particles. A mean particle diameter D50 of the aggregated particles is within a range of 0.2 ?m to 30 ?m, and a mean particle diameter D50 of the complex particles is within a range of 0.5 ?m to 40 ?m.
    Type: Application
    Filed: November 14, 2014
    Publication date: February 2, 2017
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takeshi KONDO, Tomohiro NIIMI, Yusuke SUGIYAMA, Masataka NAKANISHI, Nobuhiro GODA
  • Patent number: 9527748
    Abstract: A nanometer-size silicon material produced by heat treating a lamellar polysilane exhibits Raman-shift peaks existing at 341±10 cm?1, 360±10 cm?1, 498±10 cm?1, 638±10 cm?1, and 734±10 cm?1 in a Raman spectrum, has a large specific surface area, and has a reduced SiO content.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: December 27, 2016
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Yusuke Sugiyama, Masataka Nakanishi, Takashi Mori, Masakazu Murase, Tomohiro Niimi, Yoshihiro Nakagaki, Shigenori Koishi, Hiroshi Hirate
  • Patent number: 9493631
    Abstract: A cured product obtainable by impregnating a glass cloth with an epoxy resin composition that is suitable for producing optical sheets. The epoxy resin composition includes a polyvalent carboxylic acid (A) represented by formula (I): wherein, R1's each independently represent a hydrogen atom, an alkyl group having 1 to 15 carbon atoms, or a carboxyl group; q represents the number of substituent R1's, and represents an integer from 1 to 4; and P represents the following X: wherein there may be a plural number of R2's per ring, and R2's each independently represent a hydrogen atom or a methyl group; and * represents a bonding site linked to the oxygen atom; and an epoxy resin (B) having an aliphatic cyclic structure in the molecule. The cured product has a refractive index at 25° C. of 1.51 or higher.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: November 15, 2016
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Noriko Kiyoyanagi, Masataka Nakanishi, Yoshihiro Kawata, Junko Ichikawa, Toru Kurihashi