Patents by Inventor Akiyoshi Tamai

Akiyoshi Tamai 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: 20240026090
    Abstract: Polyamide fine particles include a polymer or a copolymer including a repeating structure unit represented by Formula (1) as a main component, wherein a ratio (r/ABET) of a porosity r occupying a particle surface and a BET specific surface area ABET that is a specific surface area of the particle surface measured by a BET method is 6.0 or more and 100.0 or less: wherein x is an integer of 2 or more and 3 or less.
    Type: Application
    Filed: November 24, 2021
    Publication date: January 25, 2024
    Inventors: Ken Komiya, Akiyoshi Tamai, Kenichi Utazaki
  • Patent number: 11629243
    Abstract: A polyamide resin composition makes it possible to obtain a molded article having excellent fluidity, excellent prying strength, and excellent adhesivity with metal. The polyamide resin composition includes 100 parts by mass of a polyamide resin (A) and 0.1 part by mass or more and 10 parts by mass or less of an ammonium salt (B) composed of a C6-12 aliphatic dicarboxylic acid and ammonia.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: April 18, 2023
    Assignee: Toray Industries, Inc.
    Inventors: Nobuhiro Morioka, Akiyoshi Tamai, Hideyuki Umetsu
  • Publication number: 20220204729
    Abstract: A polyamide resin composition makes it possible to obtain a molded article having excellent fluidity, excellent prying strength, and excellent adhesivity with metal. The polyamide resin composition includes 100 parts by mass of a polyamide resin (A) and 0.1 part by mass or more and 10 parts by mass or less of an ammonium salt (B) composed of a C6-12 aliphatic dicarboxylic acid and ammonia.
    Type: Application
    Filed: July 7, 2020
    Publication date: June 30, 2022
    Inventors: Nobuhiro Morioka, Akiyoshi Tamai, Hideyuki Umetsu
  • Patent number: 11136447
    Abstract: A polyamide resin composition includes 100 parts by weight of a polyamide resin (A), 0.1 to 50 parts by weight of a fire retardant (B), 0.001 to 1 part by weight of a metal and/or salt thereof (C), and 0.001 to 1 part by weight of a compound (D) as represented by formula [I]: QX [I] wherein in formula [I], Q represents an aromatic hydrocarbon group or an alicyclic hydrocarbon group and X represents a 5-membered heterocyclic ring group, Q and X forming a covalent bond or a fused ring.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: October 5, 2021
    Assignee: Toray Industries, Inc.
    Inventors: Akiyoshi Tamai, Hiroshi Nakagawa, Masaru Akita, Hideyuki Umetsu
  • Publication number: 20200062925
    Abstract: A polyamide resin composition includes 100 parts by weight of a polyamide resin (A), 0.1 to 50 parts by weight of a fire retardant (B), 0.001 to 1 part by weight of a metal and/or salt thereof (C), and 0.001 to 1 part by weight of a compound (D) as represented by formula [I]: QX [I] wherein in formula [I], Q represents an aromatic hydrocarbon group or an alicyclic hydrocarbon group and X represents a 5-membered heterocyclic ring group, Q and X forming a covalent bond or a fused ring.
    Type: Application
    Filed: November 10, 2017
    Publication date: February 27, 2020
    Inventors: Akiyoshi Tamai, Hiroshi Nakagawa, Masaru Akita, Hideyuki Umetsu
  • Patent number: 10391676
    Abstract: A fiber-reinforced multilayered pellet includes a sheath layer and a core layer, the sheath layer being made of a resin composition containing a thermoplastic resin (a1) and a fibrous filler (b1), wherein the fibrous filler (b1) has a weight-average fiber length (Lw) of 0.1 mm to less than 0.5 mm and a weight-average fiber length/number-average fiber length ratio (Lw/Ln) of 1.0 to less than 1.8, the core layer being made of a resin composition containing a thermoplastic resin (a2) and a fibrous filler (b2), wherein the fibrous filler (b2) has a weight-average fiber length (Lw) of 0.5 mm to less than 15.0 mm and a weight-average fiber length/number-average fiber length ratio (Lw/Ln) of 1.8 to less than 5.0.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: August 27, 2019
    Assignee: Toray Industries, Inc.
    Inventors: Akiyoshi Tamai, Kimihiko Hattori, Kenichi Utazaki
  • Patent number: 9803061
    Abstract: A carbon fiber-reinforced thermoplastic resin composition includes a thermoplastic resin (A), a carbon fiber (B), and a titanium compound (C), an amount of the thermoplastic resin (A) being 10 to 65% by weight, an amount of the carbon fiber (B) being 35 to 90% by weight, based on 100% by weight of the total amount of the thermoplastic resin (A) and the carbon fiber (B), and an amount of the titanium compound (C) being 0.01 to 5 parts by weight, based on 100 parts by weight of the total amount of the thermoplastic resin (A) and the carbon fiber (B).
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: October 31, 2017
    Assignee: Toray Industries, Inc.
    Inventors: Kimihiko Hattori, Akiyoshi Tamai, Kenichi Utazaki
  • Publication number: 20170001336
    Abstract: A fiber-reinforced multilayered pellet includes a sheath layer and a core layer, the sheath layer being made of a resin composition containing a thermoplastic resin (a1) and a fibrous filler (b1), wherein the fibrous filler (b1) has a weight-average fiber length (Lw) of 0.1 mm to less than 0.5 mm and a weight-average fiber length/number-average fiber length ratio (Lw/Ln) of 1.0 to less than 1.8, the core layer being made of a resin composition containing a thermoplastic resin (a2) and a fibrous filler (b2), wherein the fibrous filler (b2) has a weight-average fiber length (Lw) of 0.5 mm to less than 15.0 mm and a weight-average fiber length/number-average fiber length ratio (Lw/Ln) of 1.8 to less than 5.0.
    Type: Application
    Filed: January 27, 2015
    Publication date: January 5, 2017
    Inventors: Akiyoshi Tamai, Kimihiko Hattori, Kenichi Utazaki
  • Publication number: 20140296414
    Abstract: A carbon fiber-reinforced thermoplastic resin composition includes a thermoplastic resin (A), a carbon fiber (B), and a titanium compound (C), an amount of the thermoplastic resin (A) being 10 to 65% by weight, an amount of the carbon fiber (B) being 35 to 90% by weight, based on 100% by weight of the total amount of the thermoplastic resin (A) and the carbon fiber (B), and an amount of the titanium compound (C) being 0.01 to 5 parts by weight, based on 100 parts by weight of the total amount of the thermoplastic resin (A) and the carbon fiber (B).
    Type: Application
    Filed: November 19, 2012
    Publication date: October 2, 2014
    Inventors: Kimihiko Hattori, Akiyoshi Tamai, Kenichi Utazaki
  • Patent number: 8664334
    Abstract: A resin composition is described that is excellent in strength, impact resistance, heat resistance and moldability, while further allowing for a reduction in the amount of CO2 needed for its production. The resin composition includes a styrene-based resin (A), an aliphatic polyester (B) and at least one species selected from a compatibilizer (C) and a dicarboxylic anhydride (D), wherein the compatibilizer is preferably at least one species selected from: (C-1) a methyl methacrylate polymer; (C-2) a vinyl-based polymer to which an epoxy unit or acid anhydride unit is copolymerized; (C-3) a graft polymer in which a methyl methacrylate unit is grafted to a rubbery polymer; and (C-4) a block copolymer having a polylactide segment and a vinyl-based polymer segment.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: March 4, 2014
    Assignee: Toray Industries, Inc.
    Inventors: Sadanori Kumazawa, Akiyoshi Tamai, Hiroyuki Ohme, Sadayuki Kobayashi
  • Publication number: 20110269907
    Abstract: A resin composition is described that is excellent in strength, impact resistance, heat resistance and moldability, while further allowing for a reduction in the amount of CO2 needed for its production. The resin composition includes a styrene-based resin (A), an aliphatic polyester (B) and at least one species selected from a compatibilizer (C) and a dicarboxylic anhydride (D), wherein the compatibilizer is preferably at least one species selected from: (C-1) a methyl methacrylate polymer; (C-2) a vinyl-based polymer to which an epoxy unit or acid anhydride unit is copolymerized; (C-3) a graft polymer in which a methyl methacrylate unit is grafted to a rubbery polymer; and (C-4) a block copolymer having a polylactide segment and a vinyl-based polymer segment.
    Type: Application
    Filed: July 11, 2011
    Publication date: November 3, 2011
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Sadanori KUMAZAWA, Akiyoshi Tamai, Hiroyuki Ohme, Sadayuki Kobayashi
  • Patent number: 7999021
    Abstract: A resin composition is described that is excellent in strength, impact resistance, heat resistance and moldability, while further allowing for a reduction in the amount of CO2 needed for its production. The resin composition includes a styrene-based resin (A), an aliphatic polyester (B) and at least one species selected from a compatibilizer (C) and a dicarboxylic anhydride (D), wherein the compatibilizer is preferably at least one species selected from: (C-1) a methyl methacrylate polymer; (C-2) a vinyl-based polymer which an epoxy unit or acid anhydride unit is copolymerized; (C-3) a graft polymer in which a methyl methacrylate unit is grafted to a rubbery polymer; and (C-4) a block copolymer having a polylactide segment and a vinyl-based polymer segment.
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: August 16, 2011
    Assignee: Toray Industries, Inc.
    Inventors: Sadanori Kumazawa, Akiyoshi Tamai, Hiroyuki Ohme, Sadayuki Kobayashi, Akinori Kanomata, Koji Yamauchi
  • Patent number: 7964666
    Abstract: The present invention is a thermoplastic resin composition which is obtained by adding a specific modified vinyl copolymer having a specific intrinsic viscosity to a composition comprising a styrene-based resin and a polyamide resin. The thermoplastic resin composition has excellent flowability and has a far better surface appearance than conventional ones while satisfactorily retaining rigidity, heat resistance, chemical resistance, and impact resistance at room and low temperatures.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: June 21, 2011
    Assignee: Toray Industries, Inc.
    Inventors: Takuya Morishita, Akiyoshi Tamai, Akiko Tanaka, Makiko Saito
  • Patent number: 7956126
    Abstract: A styrene-based resin composition that can be effectively used as a structural material owing to its excellent mechanical properties and also as a functional material owing to its excellent regularity and a method for manufacturing a styrene-based resin composition structurally controllable in nanometer order to micrometer order. The styrene-based resin composition includes (A) a styrene-based resin, (B) a thermoplastic resin other than a styrene-based resin, (c1) a modified styrene-based polymer and (c2) a polycarbonate-based graft polymer.
    Type: Grant
    Filed: February 27, 2006
    Date of Patent: June 7, 2011
    Assignee: Toray Industries, Inc.
    Inventors: Akiyoshi Tamai, Shinichiro Ochiai, Sadayuki Kobayashi
  • Publication number: 20100160505
    Abstract: The present invention provides a resin composition excellent in strength, impact resistance, heat resistance and moldability and further, of low environmental load capable of decreasing CO2 exhaustion in its production. The present invention is a resin composition comprising a styrene-based resin (A), an aliphatic polyester (B) and at least one species selected from a compatibilizer (C) and a dicarboxylic anhydride (D), and the compatibilizer is preferably at least one species described below.
    Type: Application
    Filed: July 31, 2006
    Publication date: June 24, 2010
    Inventors: Sadanori Kumazawa, Akiyoshi Tamai, Hiroyuki Ohme, Sadayuki Kobayashi, Akinori Kanomata, Koji Yamauchi
  • Publication number: 20080176999
    Abstract: A styrene-based resin composition comprising (A) a styrene-based resin, (B) a thermoplastic resin other than styrene-based resins, (c1) a modified styrene-based polymer and (c2) a polycarbonate-based graft polymer.
    Type: Application
    Filed: February 27, 2006
    Publication date: July 24, 2008
    Inventors: Akiyoshi Tamai, Shinichiro Ochiai, Sadayuki Kobayashi
  • Publication number: 20080071024
    Abstract: The present invention is a thermoplastic resin composition which is obtained by adding a specific modified vinyl copolymer having a specific intrinsic viscosity to a composition comprising a styrene-based resin and a polyamide resin. The thermoplastic resin composition has excellent flowability and has a far better surface appearance than conventional ones while satisfactorily retaining rigidity, heat resistance, chemical resistance, and impact resistance at room and low temperatures.
    Type: Application
    Filed: July 14, 2005
    Publication date: March 20, 2008
    Inventors: Takuya Morishita, Akiyoshi Tamai, Akiko Tanaka, Makiko Saito
  • Publication number: 20060006641
    Abstract: A flange structure includes a main part 10 having a flange 14, internally provided with a fluid passage 12 and serving also as a body of a fluid device, a plate member 16 attached to the joining surface of the flange 14 of the main part 10 so as to hold a gasket 17 on the joining surface, and a connecting tube 20 inserted through the plate member 16 into the fluid passage 12 and fixed to the plate member 16 so as to extend obliquely upward toward the outside of the plate member 16.
    Type: Application
    Filed: July 7, 2005
    Publication date: January 12, 2006
    Inventors: Masatoshi Hada, Akiyoshi Tamai
  • Patent number: 6441069
    Abstract: A flame-retardant resin composition comprising (A) 100 parts by weight of a styrenic resin, (B) 1 to 30 parts by weight of a phosphate ester compound and (C) 0.1 to 10 parts by weight of a phosphate ester compound having a specific structure, and amolding product formed of the same impart a high flame retardance to the styrenic resin without using an organic halogen compound, and are also excellent in mechanical properties, impact resistance and moldability.
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: August 27, 2002
    Assignee: Toray Industries, Inc.
    Inventors: Masato Honma, Akiyoshi Tamai, Shinichi Tamura