Patents by Inventor Hajime Tsujihana

Hajime Tsujihana 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: 8334344
    Abstract: The sliding material is obtainable by extrusion of a raw material containing an olefin-based polymer and a silicone compound as the essential components. A part of the olefin-based polymer forms a crosslinked material in the sliding material. The crosslinked material forms domains to disperse in the sliding material so as to prevent uneven distribution of the silicone compound in the extrusion direction. The residual fraction of hot xylene reflux of the sliding material is in a range from 33 to 75% by weight based on the total weight of the sliding material, and the content of the silicone compound based on the total weight of the sliding material is in a range from 5 to 35% by weight.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: December 18, 2012
    Assignee: Shin-Etsu Polymer Co., Ltd.
    Inventors: Masayuki Honda, Nobuyasu Noda, Hajime Tsujihana, Fukuji Watanobe, Nobuhiko Takahashi, Tsuneo Usuda
  • Patent number: 7999038
    Abstract: A weatherstrip composition includes the following polymer A group and polymer B group, Polymer A group. A polymer group is made up of a domain 1 consisting of crosslinked product of a polymer selected from a group consisting of ethylene polymer, ethylene/?-olefin copolymer (where the ?-olefin has from 3 to 20 carbons), ethylene/?-olefin/diene copolymer (where the .alpha.-olefin has from 3 to 20 carbons), homopolymer rubber of a conjugated diene monomer, copolymer polymerized with a conjugated diene monomer and an aromatic vinyl monomer, and hydrogenated copolymer polymerized with a conjugated diene monomer and an aromatic vinyl monomer (where the hydrogenation of all double bonds except for the aromatic groups is at least 50%), and a domain 2 is made up of crosslinked product of ethylene polymer or ethylene/?-olefin copolymer (where the ?-olefin has from 3 to 20 carbons).
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: August 16, 2011
    Assignee: Shin-Etsu Polymer Co., Ltd.
    Inventors: Masayuki Honda, Hajime Tsujihana, Minoru Yoshida, Nobuyasu Noda
  • Publication number: 20100222479
    Abstract: The sliding material is obtainable by extrusion of a raw material containing an olefin-based polymer and a silicone compound as the essential components. A part of the olefin-based polymer forms a crosslinked material in the sliding material. The crosslinked material forms domains to disperse in the sliding material so as to prevent uneven distribution of the silicone compound in the extrusion direction. The residual fraction of hot xylene reflux of the sliding material is in a range from 33 to 75% by weight based on the total weight of the sliding material, and the content of the silicone compound based on the total weight of the sliding material is in a range from 5 to 20% by weight.
    Type: Application
    Filed: July 10, 2007
    Publication date: September 2, 2010
    Applicant: SHIN-ETSU POLYMER CO., LTD.
    Inventors: Masayuki Honda, Nobuyasu Noda, Hajime Tsujihana, Fukuji Watanobe, Nobuhiko Takahashi, Tsuneo Usuda
  • Publication number: 20090277095
    Abstract: The sliding material is obtainable by extrusion of a raw material containing an olefin-based polymer and a silicone compound as the essential components. A part of the olefin-based polymer forms a crosslinked material in the sliding material. The crosslinked material forms domains to disperse in the sliding material so as to prevent uneven distribution of the silicone compound in the extrusion direction. The residual fraction of hot xylene reflux of the sliding material is in a range from 33 to 75% by weight based on the total weight of the sliding material, and the content of the silicone compound based on the total weight of the sliding material is in a range from 5 to 35% by weight.
    Type: Application
    Filed: May 13, 2009
    Publication date: November 12, 2009
    Applicant: Shin-Etsu Polymer Co., Ltd.
    Inventors: Masayuki Honda, Nobuyasu Noda, Hajime Tsujihana, Fukuji Watanobe, Nobuhiko Takahashi, Tsuneo Usuda
  • Publication number: 20070122570
    Abstract: A weatherstrip in which the sliding part of a lip in sliding contact with window glass is covered by a sliding member, wherein the sliding member is composed of a weatherstrip composition containing a polymer A group and a polymer B group, 40 to 100 wt % of the total weight of this composition is accounted for by the polymer A group, and 0 to 40 wt % by the polymer B group, the polymer A group is made up of a domain 1 consisting of crosslinked product of ethylene polymer and the like, and a domain 2 consisting of crosslinked product of ethylene polymer or ethylene/?-olefin copolymer, the storage elastic modulus E? of domain 1 is at least 3 GPa and less than 9 GPa, and the loss tangent tan? is from 0.1 to 0.4, the storage elastic modulus E? of domain 2 is at least 9 GPa and no more than 13 GPa, and the loss tangent tan? is from 0.1 to 0.
    Type: Application
    Filed: January 29, 2007
    Publication date: May 31, 2007
    Applicant: Shin-Etsu Polymer Co., Ltd.
    Inventors: Masayuki Honda, Hajime Tsujihana, Minoru Yoshida, Nobuyasu Noda
  • Publication number: 20070077375
    Abstract: A weatherstrip in which the sliding part of a lip in sliding contact with window glass is covered by a sliding member, wherein the sliding member is composed of a weatherstrip composition containing a polymer A group and a polymer B group, 40 to 100 wt % of the total weight of this composition is accounted for by the polymer A group, and 0 to 40 wt % by the polymer B group, the polymer A group is made up of a domain 1 consisting of crosslinked product of ethylene polymer and the like, and a domain 2 consisting of crosslinked product of ethylene polymer or ethylene/?-olefin copolymer, the storage elastic modulus E? of domain 1 is at least 3 GPa and less than 9 GPa, and the loss tangent tan ? is from 0.1 to 0.4, the storage elastic modulus E? of domain 2 is at least 9 GPa and no more than 13 GPa, and the loss tangent tan ? is from 0.1 to 0.
    Type: Application
    Filed: April 6, 2006
    Publication date: April 5, 2007
    Applicant: Shin-Etsu Polymer Co., Ltd.
    Inventors: Masayuki Honda, Hajime Tsujihana, Minoru Yoshida, Nobuyasu Noda