Patents by Inventor Toshimori Nakai

Toshimori Nakai 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: 6649685
    Abstract: Provided are a long fiber-reinforced polypropylene resin composition which provides a molded article excellent in a mechanical strength and an impact resistance and having a small anisotropy in a strength, so that it can suitably be used even for uses in medium-sized to large-sized molded articles, and a molded article obtained from the same. The long fiber-reinforced polypropylene resin composition comprises 35 to 75% by weight of a matrix polymer comprising a modified propylene homopolymer (A1) which is prepared by modifying a propylene homopolymer with an unsaturated carboxylic acid or a derivative thereof and which has an isotactic pentad ratio (P value) of 96% or more, a melt flow rate (230° C., 21.18N) of 80 g/10 min or more and an Mw/Mn (Q value) of 3.5 or less and 25 to 65% by weight of a glass long fiber (A2) having a length of 2 to 50 mm.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: November 18, 2003
    Assignees: Chisso Corporation, Chisso Petrochemical Corporation
    Inventors: Koichi Saito, Toshimori Nakai, Nobukazu Atsumi, Hideshi Ishiwa
  • Patent number: 6627692
    Abstract: Provided are a long fiber-reinforced polypropylene resin composition and its moldings which have a high rigidity, impact resistance and durability, and especially have an extremely good repeated impact resistance and creep resistance, and are therefore suitable for various parts including automobile parts and other industrial parts.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: September 30, 2003
    Assignees: Chisso Corporation, Chisso Petrochemical Corporation
    Inventors: Koichi Saito, Toshimori Nakai, Nobukazu Atsumi, Hideshi Ishiwa
  • Patent number: 6586517
    Abstract: The present invention provides a long fiber-reinforced polypropylene resin composition for a molded article which is improved in all of a mechanical strength, a rigidity and an impact resistance and excellent as well in a durability, in which the long fiber-reinforced polypropylene resin composition comprises a long fiber-reinforced propylene polymer composition comprising a propylene polymer modified with unsaturated carboxylic acid or an anhydride thereof and having an isotactic pentad ratio of 96% or more and a melt flow rate of 100 to 500 g/10 min, an alkaline earth metal compound, and a glass fiber; and a propylene-ethylene copolymer composition comprising a propylene-ethylene copolymer having a melt flow rate of 10 to 60 g/10 min and a nucleating agent.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: July 1, 2003
    Assignees: Mazda Motor Corporation, Chisso Corporation, Chisso Petrochemical Corporation
    Inventors: Koichi Saito, Toshimori Nakai, Takahiro Tochioka
  • Patent number: 6521693
    Abstract: Provided is a long fiber-reinforced polypropylene resin composition which provides a molded article excellent in a mechanical strength and an impact resistance and having a small anisotropy in a strength, so that it can suitably be used even for uses in medium-sized to large-sized molded articles. The long fiber-reinforced polypropylene resin composition comprises 40 to 85% by weight of (A) a long fiber-reinforced propylene homopolymer pellet shown below and 15 to 60% by weight of (B) a propylene base block copolymer resin having the MFR of 50 g/10 min or less: (A): a long fiber-reinforced propylene homopolymer pellet comprising, (A1): 20 to 64.9% by weight of a modified propylene homopolymer obtained by modifying a propylene homopolymer with unsaturated carboxylic acid or an anhydride thereof or a mixture of the above modified propylene homopolymer and an unmodified propylene homopolymer, wherein an MFR is 60 g/10 min or more, (A2): 0.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: February 18, 2003
    Assignees: Chisso Corporation, Chisso Petrochemical Corporation
    Inventors: Koichi Saito, Toshimori Nakai, Nobukazu Atsumi, Hitoshi Kuramochi
  • Publication number: 20020156176
    Abstract: The present invention provides a long fiber-reinforced polypropylene resin composition for a molded article which is improved in all of a mechanical strength, a rigidity and an impact resistance and excellent as well in a durability, in which the long fiber-reinforced polypropylene resin composition comprises a long fiber-reinforced propylene polymer composition comprising a propylene polymer modified with unsaturated carboxylic acid or an anhydride thereof and having an isotactic pentad ratio of 96% or more and a melt flow rate of 100 to 500 g/10 min, an alkaline earth metal compound, and a glass fiber; and a propylene-ethylene copolymer composition comprising a propylene-ethylene copolymer having a melt flow rate of 10 to 60 g/10 min and a nucleating agent.
    Type: Application
    Filed: February 13, 2002
    Publication date: October 24, 2002
    Inventors: Koichi Saito, Toshimori Nakai, Takahiro Tochioka
  • Publication number: 20020115779
    Abstract: Provided are a long fiber-reinforced polypropylene resin composition which provides a molded article excellent in a mechanical strength and an impact resistance and having a small anisotropy in a strength, so that it can suitably be used even for uses in medium-sized to large-sized molded articles, and a molded article obtained from the same. The long fiber-reinforced polypropylene resin composition comprises 35 to 75% by weight of a matrix polymer comprising a modified propylene homopolymer (A1) which is prepared by modifying a propylene homopolymer with an unsaturated carboxylic acid or a derivative thereof and which has an isotactic pentad ratio (P value) of 96% or more, a melt flow rate (230° C., 21.18N) of 80 g/10 min or more and an Mw/Mn (Q value) of 3.5 or less and 25 to 65% by weight of a glass long fiber (A2) having a length of 2 to 50 mm.
    Type: Application
    Filed: October 9, 2001
    Publication date: August 22, 2002
    Inventors: Koichi Saito, Toshimori Nakai, Nobukazu Atsumi, Hideshi Ishiwa
  • Publication number: 20020091191
    Abstract: Provided are a long fiber-reinforced polypropylene resin composition and its moldings which have a high rigidity, impact resistance and durability, and especially have an extremely good repeated impact resistance and creep resistance, and are therefore suitable for various parts including automobile parts and other industrial parts.
    Type: Application
    Filed: November 2, 2001
    Publication date: July 11, 2002
    Applicant: Chisso Corporation
    Inventors: Koichi Saito, Toshimori Nakai, Nobukazu Atsumi, Hideshi Ishiwa
  • Publication number: 20010025074
    Abstract: Provided is a long fiber-reinforced polypropylene resin composition which provides a molded article excellent in a mechanical strength and an impact resistance and having a small anisotropy in a strength, so that it can suitably be used even for uses in medium-sized to large-sized molded articles.
    Type: Application
    Filed: February 28, 2001
    Publication date: September 27, 2001
    Inventors: Koichi Saito, Toshimori Nakai, Nobukazu Atsumi, Hitoshi Kuramochi
  • Patent number: 5319016
    Abstract: An emulsion adhesive composition is provided which comprises: (i) an aqueous elmusion of a adhesive synthetic resin and (ii) a solution of an organic solvent and a polyolefin and/or a hydrogenated block copolymer composed of an aromatic vinyl compound and an aliphatic diene polymer blocks, and each of the polyolefin and the hydrogenated block copolymer contains at least one functional group selected from carboxylic anhydride carboxyl, glycidyl, hydroxyl, amido and alkoxysilyl groups. A photostabilizer may be incorporated into the composition in which said component (ii) may contain chloro.The emulsion adhesive composition can be used for adhering a highly crystalline resin molded article to an optional material without a complicated surface treatment, and can have a light resistance and storing stability.
    Type: Grant
    Filed: February 25, 1993
    Date of Patent: June 7, 1994
    Assignee: Chisso Corporation
    Inventors: Jun Saito, Toshimori Nakai, Sinzi Chiku, Takanobu Kawamura, Kazuo Ito, Yoshiro Umemoto