Patents by Inventor Nobuyuki Tomioka

Nobuyuki Tomioka 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: 10829587
    Abstract: An epoxy resin composition produces a cured product having improved elastic modulus and improved nominal strain at compressive fracture. The epoxy resin composition is a fiber-reinforced composite material having excellent compression strength and interlayer toughness. The epoxy resin composition contains at least the following constituent components [A], [B] and [C]. [A] A specific ortho type epoxy resin. [B] At least one component selected from the group consisting of: thermoplastic resins that are compatible with the epoxy resin [A]; and core-shell type polymers. [C] An amine curing agent.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: November 10, 2020
    Assignee: Toray Industries, Inc.
    Inventors: Maki Nagano, Ayako Fuse, Nobuyuki Tomioka
  • Patent number: 10792869
    Abstract: A preform includes a plurality of reinforcement fiber layers connected to each other by binder resin, the binder resin containing spacer particles insoluble in the binder resin, the spacer particles accounting for a volume proportion of 10% to 80% in the binder resin present in interlaminar gaps between the reinforcement fiber layers.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: October 6, 2020
    Assignee: Toray Industries, Inc.
    Inventors: Masanori Hirano, Kazunori Hondo, Nobuyuki Tomioka
  • Patent number: 10717831
    Abstract: A two-component type epoxy resin composition for a fiber reinforced composite material is a two-component type epoxy resin composition for a fiber reinforced composite material that includes the following components [A] to [C], wherein the content of the component [C] is 6 to 25 mass parts relative to 100 mass parts of the component [A]. The fiber reinforced composite material is a fiber reinforced composite material made by combining and curing the two-component type epoxy resin composition for the fiber reinforced composite material and a reinforcing fiber, [A]: an epoxy resin, [B]: an acid anhydride and [C]: a quaternary ammonium salt or a quaternary phosphonium halide or an imidazolium salt.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: July 21, 2020
    Assignee: Toray Indusries, Inc.
    Inventors: Hideki Oka, Nobuyuki Tomioka, Shiro Honda
  • Publication number: 20200165398
    Abstract: A preform for fiber rein-forced composite material producing includes a thermosetting resin composition and a dry reinforcing fiber base, the thermosetting resin composition characterized in that when subjected to dynamic viscoelasticity measurement at a traction period of 0.5 Hz while heating at a rate of 1.5° C./min, a temperature change ?T is 45° C. or less as complex viscosity ?* decreases from 1×107 Pa·s to 1×101 Pa·s.
    Type: Application
    Filed: June 5, 2018
    Publication date: May 28, 2020
    Inventors: Masanori Hirano, Nobuyuki Tomioka
  • Publication number: 20200157292
    Abstract: An epoxy resin composition for fiber reinforced composite materials comprising components (A) to (E): component (A), an epoxy resin; component (B), a dicyandiamide or a derivative thereof; component (C), a polyisocyanate compound; component (D), a urea compound as represented by formula (1): (wherein R1 and R2 are each independently H, CH3, OCH3, 0C2H5, NO2, halogen, or NH—CO NR3R4; and R3 and R4 are each independently a hydrocarbon group, allyl group, alkoxy group, alkenyl group, aralkyl group, or an alicyclic compound containing both R3 and R4, all containing 1 to 8 carbon atoms); and component (E), at least one compound selected from the group consisting of quaternary ammonium salts, phosphonium salts, imidazole compounds, and phosphine compounds.
    Type: Application
    Filed: May 21, 2018
    Publication date: May 21, 2020
    Inventors: Kazunori Hondo, Norikazu Ishikawa, Masanori Hirano, Nobuyuki Tomioka
  • Publication number: 20200131324
    Abstract: A thermosetting resin composition for a fiber-reinforced composite material includes a domain of a base resin [A]; and a domain of a curing agent [B] and/or a domain of a catalyst [C], the thermosetting resin composition having a specific gravity of 0.90 to 1.30, and a complex viscosity ?* determined by dynamic viscoelasticity measurement at 25° C. of 1×107 Pa·s or more.
    Type: Application
    Filed: September 20, 2018
    Publication date: April 30, 2020
    Inventors: Masanori Hirano, Nobuyuki Tomioka
  • Patent number: 10400077
    Abstract: A reinforcing fiber fabric substrate has a binder containing a thermosetting resin [A] and a curing catalyst [B] at a basis weight of 0.1 g/m2-4 g/m2 on at least the surface of a reinforcing fiber fabric constructed of reinforcing fiber strands, wherein the reinforcing fiber fabric substrate has a heating temperature (T) in the 80-180° C. range, and the adhesive strength becomes 0.5 N/25 mm or higher at the heating temperature (T) between preform layers molded by laminating this reinforcing fiber fabric substrate at the heating temperature (T).
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: September 3, 2019
    Assignee: Toray Industries, Inc.
    Inventors: Masanori Hirano, Nobuyuki Tomioka, Shiro Honda
  • Publication number: 20190194447
    Abstract: A two-pack epoxy resin composition for a fiber-reinforced composite material contains components [A] to [E], in which the content of the component [A] is 5 to 45 parts by mass, the content of the component [B] is 5 to 50 parts by mass, and the content of the component [C] is 5 to 50 parts by mass, relative to 100 parts by mass of the total of the components [A], [B] and [C], and the fiber-reinforced composite material, component [A]: an alicyclic epoxy resin component [B]: an aliphatic epoxy resin component [C]: a bisphenol type epoxy resin component [D]: an acid anhydride component [E]: a compound selected from the group consisting of quaternary ammonium salts, quaternary phosphonium salts, and imidazolium salts.
    Type: Application
    Filed: April 25, 2017
    Publication date: June 27, 2019
    Applicant: Toray Industries, Inc.
    Inventors: Hideki Oka, Masanori Hirano, Nobuyuki Tomioka
  • Publication number: 20180340047
    Abstract: A binder resin composition for a preform has a Tg of 50° C. to 100° C., a complex viscoelastic coefficient G* determined by dynamic viscoelasticity measurement of 10 kPa to 500 kPa at Tg+30° C., and “G* at Tg+30° C./G* at Tg+80° C.” of 10 to 300, wherein the viscosity monotonically decreases as temperature of the binder resin composition for a preform rises to 200° C. The binder resin composition is excellent in storage stability at ordinary temperatures and adhesiveness between preform layers at low temperatures, and is capable of exhibiting stable adhesiveness even when the temperature during preform molding is uneven. A reinforcing fiber base material, a preform, and a fiber reinforced composite material include the binder resin composition.
    Type: Application
    Filed: December 2, 2016
    Publication date: November 29, 2018
    Inventors: Masanori Hirano, Nobuyuki Tomioka
  • Publication number: 20180264754
    Abstract: A preform includes a plurality of reinforcement fiber layers connected to each other by binder resin, the binder resin containing spacer particles insoluble in the binder resin, the spacer particles accounting for a volume proportion of 10% to 80% in the binder resin present in interlaminar gaps between the reinforcement fiber layers.
    Type: Application
    Filed: February 2, 2016
    Publication date: September 20, 2018
    Applicant: Toray Industries, Inc.
    Inventors: Masanori Hirano, Kazunori Hondo, Nobuyuki Tomioka
  • Publication number: 20180265625
    Abstract: An epoxy resin composition produces a cured product having improved elastic modulus and improved nominal strain at compressive fracture. The epoxy resin composition is a fiber-reinforced composite material having excellent compression strength and interlayer toughness. The epoxy resin composition contains at least the following constituent components [A], [B] and [C]. [A] A specific ortho type epoxy resin. [B] At least one component selected from the group consisting of: thermoplastic resins that are compatible with the epoxy resin [A]; and core-shell type polymers. [C] An amine curing agent.
    Type: Application
    Filed: July 21, 2016
    Publication date: September 20, 2018
    Applicant: Toray Industries, Inc.
    Inventors: Maki NAGANO, Ayako FUSE, Nobuyuki TOMIOKA
  • Patent number: 10072377
    Abstract: A fiber reinforced composite material having high interlaminar toughness and compressive strength under wet heat conditions, as well as an epoxy resin composition for production thereof and a prepreg producible from the epoxy resin composition is described. The prepreg includes at least constituents [A], [B], and [C] as specified below and reinforcement fiber, wherein 90% or more of constituent [C] exists in the depth range accounting for 20% of the prepreg thickness from the prepreg surface: [A] epoxy resin; [B] epoxy resin curing agent; and [C] polymer particles insoluble in epoxy resin.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: September 11, 2018
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Yuko Shimizu, Nobuyuki Tomioka, Shirou Honda, Maki Nagano, Yuji Echigo, Hiroshi Takezaki, Junko Kawasaki, Hiroshi Taiko
  • Patent number: 10053575
    Abstract: A binder resin composition for preform production includes thermosetting resin [A], thermoplastic resin [B], and curing catalyst [C], thermosetting resin [A] containing a bifunctional epoxy resin, thermoplastic resin [B] accounting for 10 to 100 parts by mass relative to 100 parts by mass of thermosetting resin [A], and curing catalyst [C] being at least one curing catalyst selected from the group consisting of organic phosphorus compounds, imidazole, and derivatives thereof.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: August 21, 2018
    Assignee: Toray Industries, Inc.
    Inventors: Masanori Hirano, Nobuyuki Tomioka, Shiro Honda
  • Patent number: 9963589
    Abstract: An epoxy resin composition comprising the following constituents [A], [B], and [C]: [A] an epoxy resin having a structure represented by a formula (1); in which a ring Z represents a condensed polycyclic aromatic hydrocarbon ring, R1 and R2 represent a substituent, R3 represents a hydrogen atom or a methyl group, k is an integer of 0 to 4, m is an integer of 0 or more, and n is an integer of 1 or more; [B] at least one resin selected from the group consisting of the following [Bx], [By] and [Bz]; [Bx] a bisphenol type epoxy resin; [By] an amine type epoxy resin; and [Bz] a thermoplastic resin; [C] a polyamine curing agent. Provided is an epoxy resin composition which provides a cured product having excellent heat resistance, toughness and elastic modulus.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: May 8, 2018
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Maki Nagano, Ayako Fuse, Nobuyuki Tomioka
  • Publication number: 20180057645
    Abstract: A two-component type epoxy resin composition for a fiber reinforced composite material is a two-component type epoxy resin composition for a fiber reinforced composite material that includes the following components [A] to [C], wherein the content of the component [C] is 6 to 25 mass parts relative to 100 mass parts of the component [A]. The fiber reinforced composite material is a fiber reinforced composite material made by combining and curing the two-component type epoxy resin composition for the fiber reinforced composite material and a reinforcing fiber, [A]: an epoxy resin, [B]: an acid anhydride and [C]: a quaternary ammonium salt or a quaternary phosphonium halide or an imidazolium salt.
    Type: Application
    Filed: March 25, 2016
    Publication date: March 1, 2018
    Inventors: Hideki Oka, Nobuyuki Tomioka, Shiro Honda
  • Patent number: 9834670
    Abstract: Provided are a fiber-reinforced composite material excellent in heat resistance and strength properties, an epoxy resin composition to obtain the fiber-reinforced composite material, and a prepreg obtained by using the epoxy resin composition. Further provided are a fiber-reinforced composite material having less volatile matters during the curing time, and having excellent heat resistance and strength properties, an epoxy resin composition to obtain the fiber-reinforced composite material, and a prepreg obtained by using the epoxy resin composition. Provided are: an epoxy resin composition for a fiber-reinforced composite material, comprising an amine type epoxy resin [A], an aromatic amine curing agent [B], and a block copolymer [C] having a reactive group capable of reacting with an epoxy resin; a prepreg obtained by impregnating a reinforced fiber with the epoxy resin composition; and a fiber-reinforced composite material obtained by curing the prepreg.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: December 5, 2017
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Maki Mizuki, Yuko Goto, Nobuyuki Tomioka, Hiroaki Sakata, Hiroshi Taiko
  • Publication number: 20170342225
    Abstract: Provided are: an epoxy resin composition having exceptional performance with regard to impregnating reinforcing fibers, enabling optimal control of resin flow during molding, and having exceptional in-plane shear strength; a cured epoxy resin product; and a prepreg.
    Type: Application
    Filed: November 19, 2015
    Publication date: November 30, 2017
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Maki NAGANO, Nobuyuki TOMIOKA
  • Publication number: 20170306117
    Abstract: Provided is an epoxy resin composition with improved heat resistance and resin elongation. Further provided is a fiber-reinforced composite material which uses the epoxy resin composition and thereby excels in compression strength in high-temperature environments and interlaminar toughness. The epoxy resin composition comprises the constituents [A], [B] and [C], 8-40 mass % of [B] is contained in the epoxy resin composition. The number of moles of active hydrogen contained in [C] is 1.05-2.0 times the number of moles of epoxy groups contained in the entire epoxy resin composition, in a cured resin formed by curing the epoxy resin composition and having a degree of curing of at least 90% obtained by DSC (differential scanning catorimetry), [A], [B] and [C] form a monolayer structure, or a phase separation structure of less than 500 nm. The rubber state modulus of elasticity Y (MPa) and glass transition temperature X (° C.) obtained by DMA (dynamic mechanical analysis) of the cured resin satisfy formula (1).
    Type: Application
    Filed: August 27, 2015
    Publication date: October 26, 2017
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Ayako FUSE, Nobuyuki TOMIOKA, Shizue KOYANAGI, Nobuyuki ARAI, Shirou HONDA
  • Patent number: 9676937
    Abstract: [Problem] To provide: a fiber-reinforced composite material having both Mode I interlaminar fracture toughness and compressive strength under wet heat conditions; an epoxy resin composition for producing the fiber-reinforced composite material; and a prepreg produced using the epoxy resin composition. [Solution] An epoxy resin composition comprising at least the following constituents [A], [B] and [C]: [A] an epoxy resin; [B] composite polyamide microparticles which satisfy such a requirement (b1) the materials constituting the particles are a polyamide (B1) and a thermoplastic elastomer resin (B2), such a requirement (b2) that the melting point or the glass transition temperature of the polyamide (B1) is higher than 100° C. and such a requirement (b3) the number average particle diameter is 0.1 to 100 ?m; and [C] a curing agent.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: June 13, 2017
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Hiroshi Kobayashi, Takahiko Otsubo, Hiroshi Takezaki, Nobuyuki Tomioka
  • Patent number: 9676936
    Abstract: The invention provides a prepreg that can give a fiber-reinforced composite material exhibiting stable and excellent interlaminar fracture toughness and impact resistance under wide molding conditions. The prepreg includes at least a reinforcement fiber [A], a thermosetting resin [B], and the following component [C] wherein 90% or more of the material [C] is present inside a region of the prepreg that extends from any surface of the prepreg to a prepreg site having, from the surface, a depth of 20% of the thickness of the prepreg. The component [C] satisfies requirements that (i) the storage elastic modulus G? of the material constituting the particles is more than 1 MPa, and 70 MPa or less at 180° C., and that (ii) the ratio of the storage elastic modulus G? of the material constituting the particles at 160° C. to the storage elastic modulus G? of the material at 200° C. ranges from 1 to 5; and is insoluble in the thermosetting resin [B].
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: June 13, 2017
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Yuko Shimizu, Hiroshi Kobayashi, Nobuyuki Tomioka, Hiroshi Takezaki, Shirou Honda