Patents by Inventor Takaharu Shigematsu

Takaharu Shigematsu 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: 10879439
    Abstract: There is provided a polyamide composition for an LED reflection plate, including a polyamide (A), a titanium oxide (B), a magnesium oxide (C), a phenolic antioxidant (D), and a phosphorus-containing antioxidant (E), wherein the polyamide (A) is a polyamide having a dicarboxylic acid unit comprising 50% by mol or more of 1,4-cyclohexanedicarboxylic acid unit and a diamine unit and having a melting point of 280° C. or higher; the phenolic antioxidant (D) does not have 4 or more phenol structures in its molecule; and the phosphorus-containing antioxidant (E) has 3 or more predetermined structures represented by the formula (1) in its molecule, wherein the content of the titanium oxide (B) is 10 to 100 parts by mass, the content of the magnesium oxide (C) is 0.50 to 15.0 parts by mass, and the content of the phenolic antioxidant (D) is 0.10 to 0.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: December 29, 2020
    Assignee: KURARAY CO., LTD.
    Inventors: Shimon Kanai, Takaharu Shigematsu
  • Publication number: 20200290249
    Abstract: The present invention relates to a waterproof component that is an insert molded body formed from a thermoplastic resin composition and a metal component, wherein the thermoplastic resin composition contains a thermoplastic resin (A) and an inorganic fibrous reinforcement (B); the content of the inorganic fibrous reinforcement (B) is 8 to 130 parts by mass based on 100 parts by mass of the thermoplastic resin (A); and the inorganic fibrous reinforcement (B) has an average fiber diameter of 10 ?m or less and an average fiber length of 300 ?m or less.
    Type: Application
    Filed: October 26, 2018
    Publication date: September 17, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Naoto SUGAI, Yuki ITO, Takaharu SHIGEMATSU
  • Patent number: 10703903
    Abstract: There is provided a polyamide composition for an LED reflection plate, including a polyamide (A), a titanium oxide (B), a magnesium oxide (C), a phenolic antioxidant (D), and a phosphorus-containing antioxidant (E), wherein the polyamide (A) is a polyamide having a dicarboxylic acid unit comprising 50% by mol or more of terephthalic acid unit and a diamine unit and having a melting point of 280° C. or higher; the phenolic antioxidant (D) does not have 4 or more phenol structures in its molecule; wherein the content of the titanium oxide (B) is 10 to 100 parts by mass, the content of the magnesium oxide (C) is 0.50 to 15.0 parts by mass, and the content of the phenolic antioxidant (D) is 0.10 to 0.80 part by mass, with respect to 100 parts by mass of the polyamide (A); and the content of the phosphorus-containing antioxidant (E) satisfies the following expression (I): 0.25?mass ratio [(D)component/(E)component]?3.0??(I).
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: July 7, 2020
    Assignee: KURARAY CO., LTD.
    Inventors: Shimon Kanai, Nobuhiro Oya, Takaharu Shigematsu
  • Patent number: 10480749
    Abstract: The present invention provides a polyamide composition for a reflector having high heat resistance and good mechanical properties, having excellent adhesion to a sealing material for an LED package, and capable of retaining a high reflectance even after exposure to heat and light intended for the production process of the LED package and the environment in which the reflector is used in the LED package, when it is molded. The present invention is a polyamide composition for a reflector, containing: 30 mass % or more of a polyamide (A) having a melting point of 280° C. or higher; and 25 mass % or more of titanium oxide (B). The total content of the polyamide (A) and the titanium oxide (B) is 75 mass % or more.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: November 19, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Kozo Tamura, Takaharu Shigematsu, Shimon Kanai
  • Patent number: 10407548
    Abstract: The present invention provides a polyamide composition for a reflector having high heat resistance and good mechanical properties, having excellent adhesion to a sealing material for an LED package, and capable of retaining a high reflectance even after exposure to heat and light intended for the production process of the LED package and the environment in which the reflector is used in the LED package, when it is molded. The present invention is a polyamide composition for a reflector, containing: 30 mass % or more of a polyamide (A) having a melting point of 280° C. or higher; and 25 mass % or more of titanium oxide (B). The total content of the polyamide (A) and the titanium oxide (B) is 75 mass % or more.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: September 10, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Kozo Tamura, Takaharu Shigematsu, Shimon Kanai
  • Publication number: 20180371241
    Abstract: There is provided a polyamide composition for an LED reflection plate, including a polyamide (A), a titanium oxide (B), a magnesium oxide (C), a phenolic antioxidant (D), and a phosphorus-containing antioxidant (E), wherein the polyamide (A) is a polyamide having a dicarboxylic acid unit comprising 50% by mol or more of terephthalic acid unit and a diamine unit and having a melting point of 280° C. or higher; the phenolic antioxidant (D) does not have 4 or more phenol structures in its molecule; wherein the content of the titanium oxide (B) is 10 to 100 parts by mass, the content of the magnesium oxide (C) is 0.50 to 15.0 parts by mass, and the content of the phenolic antioxidant (D) is 0.10 to 0.80 part by mass, with respect to 100 parts by mass of the polyamide (A); and the content of the phosphorus-containing antioxidant (E) satisfies the following expression (I): 0.25?mass ratio [(D)component/(E)component]?3.0??(I).
    Type: Application
    Filed: June 28, 2016
    Publication date: December 27, 2018
    Applicant: KURARAY CO., LTD.
    Inventors: Shimon KANAI, Nobuhiro OYA, Takaharu SHIGEMATSU
  • Publication number: 20180355143
    Abstract: The present invention relates to a polyester composition for an LED reflection plate containing a polyester (A), a titanium oxide (B), a phenolic antioxidant (C), and a phosphorus-based antioxidant (D), wherein the polyester (A) is a polyester having a structural unit derived from a dicarboxylic acid including 50 mol % or more of terephthalic acid and a structural unit derived from a diol including 50 mol % or more of 1,4-cyclohexanedimethanol; the phosphorus-based antioxidant (D) contains three or more groups represented by the formula (1) in a molecule thereof; the content of the titanium oxide (B) is 20 to 90 parts by mass, and the content of the phenolic antioxidant (C) is 0.1 to 0.8 parts by mass, on the basis of 100 parts by mass of the polyester (A); and the content of the phosphorus-based antioxidant (D) satisfies the following equation (I); an LED reflection plate composed of the foregoing composition; and a light-emitting device including the foregoing reflection plate. 0.
    Type: Application
    Filed: November 16, 2016
    Publication date: December 13, 2018
    Applicant: KURARAY CO., LTD.
    Inventors: Shimon KANAI, Nobuhiro OYA, Takaharu SHIGEMATSU
  • Publication number: 20180198043
    Abstract: There is provided a polyamide composition for an LED reflection plate, including a polyamide (A), a titanium oxide (B), a magnesium oxide (C), a phenolic antioxidant (D), and a phosphorus-containing antioxidant (E), wherein the polyamide (A) is a polyamide having a dicarboxylic acid unit comprising 50% by mol or more of 1,4-cyclohexanedicarboxylic acid unit and a diamine unit and having a melting point of 280° C. or higher; the phenolic antioxidant (D) does not have 4 or more phenol structures in its molecule; and the phosphorus-containing antioxidant (E) has 3 or more predetermined structures represented by the formula (1) in its molecule, wherein the content of the titanium oxide (B) is 10 to 100 parts by mass, the content of the magnesium oxide (C) is 0.50 to 15.0 parts by mass, and the content of the phenolic antioxidant (D) is 0.10 to 0.
    Type: Application
    Filed: June 28, 2016
    Publication date: July 12, 2018
    Applicant: KURARAY CO., LTD.
    Inventors: Shimon KANAI, Takaharu SHIGEMATSU
  • Patent number: 9822949
    Abstract: The present invention provides a polyamide composition for a reflector having high heat resistance and good mechanical properties, having excellent adhesion to a sealing material for an LED package, and capable of retaining a high reflectance even after exposure to heat and light intended for the production process of the LED package and the environment in which the reflector is used in the LED package, when it is molded. The present invention is a polyamide composition for a reflector, containing: 30 mass % or more of a polyamide (A) having a melting point of 280° C. or higher; and 25 mass % or more of titanium oxide (B). The total content of the polyamide (A) and the titanium oxide (B) is 75 mass % or more.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: November 21, 2017
    Assignee: KURARAY CO., LTD.
    Inventors: Kozo Tamura, Takaharu Shigematsu, Shimon Kanai
  • Publication number: 20130296472
    Abstract: The present invention provides a polyamide composition for a reflector having high heat resistance and good mechanical properties, having excellent adhesion to a sealing material for an LED package, and capable of retaining a high reflectance even after exposure to heat and light intended for the production process of the LED package and the environment in which the reflector is used in the LED package, when it is molded. The present invention is a polyamide composition for a reflector, containing: 30 mass % or more of a polyamide (A) having a melting point of 280° C. or higher; and 25 mass % or more of titanium oxide (B). The total content of the polyamide (A) and the titanium oxide (B) is 75 mass % or more.
    Type: Application
    Filed: January 20, 2012
    Publication date: November 7, 2013
    Applicant: KURARAY CO., LTD.
    Inventors: Kozo Tamura, Takaharu Shigematsu, Shimon Kanai
  • Publication number: 20130286654
    Abstract: The present invention provides a polyamide composition for a reflector having high heat resistance and good mechanical properties, having excellent adhesion to a sealing material for an LED package, and capable of retaining a high reflectance even after exposure to heat and light intended for the production process of the LED package and the environment in which the reflector is used in the LED package, when it is molded. The present invention is a polyamide composition for a reflector, containing: 30 mass % or more of a polyamide (A) having a melting point of 280° C. or higher; and 25 mass % or more of titanium oxide (B). The total content of the polyamide (A) and the titanium oxide (B) is 75 mass % or more.
    Type: Application
    Filed: July 1, 2013
    Publication date: October 31, 2013
    Applicant: Kuraray Co., Ltd
    Inventors: Kozo Tamura, Takaharu Shigematsu, Shimon Kanai
  • Publication number: 20130286655
    Abstract: The present invention provides a polyamide composition for a reflector having high heat resistance and good mechanical properties, having excellent adhesion to a sealing material for an LED package, and capable of retaining a high reflectance even after exposure to heat and light intended for the production process of the LED package and the environment in which the reflector is used in the LED package, when it is molded. The present invention is a polyamide composition for a reflector, containing: 30 mass % or more of a polyamide (A) having a melting point of 280° C. or higher; and 25 mass % or more of titanium oxide (B). The total content of the polyamide (A) and the titanium oxide (B) is 75 mass % or more.
    Type: Application
    Filed: July 1, 2013
    Publication date: October 31, 2013
    Inventors: Kozo TAMURA, Takaharu Shigematsu, Shimon Kanai
  • Publication number: 20110196080
    Abstract: A polyamide composition comprising: 100 parts by mass of polyamide (A) with a melting point of 270° C. to 340° C., 1 to 100 parts by mass of flame retardant (B), and 1 to 10 parts by mass of anti-dripping agent (C), wherein the anti-dripping agent (C) comprises a fluorine resin (C1) and at least one polymer (C2) selected from the group consisting of an ionomer and a modified aromatic vinyl-based polymer containing less than 15 mass % of halogen atom, in which a mass ratio of the fluorine resin (C1)/the polymer (C2) is 1/4 to 4/1.
    Type: Application
    Filed: July 25, 2008
    Publication date: August 11, 2011
    Applicant: Kuraray Co., Ltd.
    Inventors: Hideharu Matsuoka, Takaharu Shigematsu, Kozo Tamura, Shigeru Kawahara