Patents by Inventor Itsushi Imamura

Itsushi Imamura 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: 10233317
    Abstract: Provided are a polypropylene resin composition comprising a polypropylene resin (A), a specific fiber (B), an organic flame retardant (C) and a polytetrafluoroethylene resin (D) each in a specific amount, and a molded article obtained by molding the composition.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: March 19, 2019
    Assignee: JAPAN POLYPROPYLENE CORPORATION
    Inventors: Masayuki Kabeya, Kazunobu Nakamori, Itsushi Imamura
  • Publication number: 20170226327
    Abstract: The invention is to provide a flame-retardant polypropylene resin composition that exhibits extremely high-level flame retardance and is given mechanical properties (rigidity, impact shock), weather resistance and moldability by satisfying both self-extinguishing property and drip resistance and to provide a molded article using the composition. The invention relates to a polypropylene resin composition comprising a specific polypropylene resin (A) that contains a polypropylene resin (X) having a specific long-chain branched structure, a specific fiber (B) and an organic flame retardant (C) each in an amount falling within a range of a specific amount, and to a molded article obtained by molding the composition.
    Type: Application
    Filed: October 1, 2014
    Publication date: August 10, 2017
    Applicant: JAPAN POLYPROPYLENE CORPORATION
    Inventors: Masayuki KABEYA, Kazunobu NAKAMORI, Itsushi IMAMURA
  • Publication number: 20170218189
    Abstract: Provided are a polypropylene resin composition comprising a polypropylene resin (A), a specific fiber (B), an organic flame retardant (C) and a polytetrafluoroethylene resin (D) each in a specific amount, and a molded article obtained by molding the composition.
    Type: Application
    Filed: October 1, 2014
    Publication date: August 3, 2017
    Applicant: JAPAN POLYPROPYLENE CORPORATION
    Inventors: Masayuki KABEYA, Kazunobu NAKAMORI, Itsushi IMAMURA
  • Patent number: 9321897
    Abstract: Provided is a thermoplastic resin composition that is free of discoloration defects, is resistant to the staining and deterioration caused by urine, fecal matter, detergents and so forth, exhibits an excellent tactile sensation, and also exhibits an excellent marring resistance and that is thus well suited for toilet components. Toilet components comprising this thermoplastic resin composition are also provided. The thermoplastic resin composition comprises (A) a thermoplastic resin and, per 100 weight parts thereof, (B) 2 to 40 weight parts of an organic flame retardant, 0.1 to 2 weight parts of a component (D), and as desired, (C) 0.1 to 20 weight parts of a flame retardant synergist, wherein the component (D) satisfies the following condition: condition: the component (D) is at least one compound selected from the group consisting of polyolefin-based waxes, alcohols, carboxylic acids, and esters, and having a melting point of not more than 100° C. and an HLB value of not more than 5.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: April 26, 2016
    Assignee: Japan Polypropylene Corporation
    Inventors: Masayuki Kabeya, Toshihiro Yoshida, Itsushi Imamura
  • Publication number: 20140309350
    Abstract: Provided is a thermoplastic resin composition that is free of discoloration defects, is resistant to the staining and deterioration caused by urine, fecal matter, detergents and so forth, exhibits an excellent tactile sensation, and also exhibits an excellent marring resistance and that is thus well suited for toilet components. Toilet components comprising this thermoplastic resin composition are also provided. The thermoplastic resin composition comprises (A) a thermoplastic resin and, per 100 weight parts thereof, (B) 2 to 40 weight parts of an organic flame retardant, 0.1 to 2 weight parts of a component (D), and as desired, (C) 0.1 to 20 weight parts of a flame retardant synergist, wherein the component (D) satisfies the following condition: condition: the component (D) is at least one compound selected from the group consisting of polyolefin-based waxes, alcohols, carboxylic acids, and esters, and having a melting point of not more than 100° C. and an HLB value of not more than 5.
    Type: Application
    Filed: October 25, 2012
    Publication date: October 16, 2014
    Applicant: Japan Polypropylene Corporation
    Inventors: Masayuki Kabeya, Toshihiro Yoshida, Itsushi Imamura
  • Patent number: 5296186
    Abstract: A process for producing a molded product of propylene resin which includes melting and kneading at least a part of the following component (a), adding to the resulting melt the following component (b) or the component (b) and the remainder of the component (a) and kneading the resulting mixture to prepare a resin composition having a melt flow rate of 1 to 100 g/10 min, and then molding the resin composition into a molded product in which the breakage rate of the component (b) is 30% by weight or less: (a) 100 parts by weight of a crystalline propylene polymer having a melt flow rate of 1 to 300 g/10 min and (b) 3 to 80 parts by weight of a filler in the form of hollow particles having a mean particle density (true density) of 0.1 to 0.9 g/cm.sup.3, as measured according to ASTM-D2840, a mean particle diameter of 7 to 100 .mu.m and a 10%-by-weight breakage pressure resistance of 100 kg/cm.sup.2 or more, as measured according to ASTM-D3102.
    Type: Grant
    Filed: February 12, 1993
    Date of Patent: March 22, 1994
    Assignee: Mitsubishi Petrochemical Company Limited
    Inventors: Yoshihiro Sobajima, Masahide Hamaura, Itsushi Imamura