Patents by Inventor Fumihiro Mitamura

Fumihiro Mitamura 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: 20210130640
    Abstract: The present invention relates to polyvinyl chloride aggregate particles, in which a particle diameter D50 at a cumulative volume percentage of 50 vol % in a volume particle size distribution is 0.5 ?m or more and 5.0 ?m or less, and a particle diameter D90 at a cumulative volume percentage of 90 vol % in the volume particle size distribution is 8.0 ?m or less, and a Na concentration in the polyvinyl chloride aggregate particles is 90 ppm or less. The present invention relates to a composition for a metal can coating material, a composition for a marking film and a method for producing the same, and a coating film that contain the polyvinyl chloride aggregate particles. This provides polyvinyl chloride aggregate particles capable of imparting high transparency and retort resistance to a coating film of a metal can, and/or capable of imparting high transparency and water resistance to a marking film.
    Type: Application
    Filed: February 12, 2019
    Publication date: May 6, 2021
    Applicant: KANEKA CORPORATION
    Inventors: Yoshitaka Nishiyama, Fumihiro Mitamura
  • Patent number: 8937113
    Abstract: The present invention provides vinyl chloride-based resin aggregate particles capable of providing a plastisol with excellent non-infiltrating property and favorable sagging property, a method for producing the same, and a glove using the same. The vinyl chloride-based resin aggregate particles of the present invention have a mean volume particle diameter of 10 to 60 ?m, and the percentage of particles having a particle diameter of 10 to 60 ?m is at least 50 vol %. The moisture absorption coefficient is 1.5 wt % or less when being retained for 24 hours under conditions of 30° C. and a relative humidity of 97.0±0.4%. A plastisol comprising 100 weight parts of the vinyl chloride-based resin aggregate particles and 160 weight parts of di-2-ethylhexyl phthalate satisfies a relationship of 3??70/?40?1000. Further, in the vinyl chloride-based resin aggregate particles of the present invention, the number of voids having a void size of 1.0 ?m or more per one aggregate particle is less than 5.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: January 20, 2015
    Assignee: Kaneka Corporation
    Inventors: Takashi Ueda, Fumihiro Mitamura, Hiroshi Saito, Morio Ishihara
  • Publication number: 20140088222
    Abstract: The present invention provides vinyl chloride-based resin aggregate particles capable of providing a plastisol with excellent non-infiltrating property and favorable sagging property, a method for producing the same, and a glove using the same. The vinyl chloride-based resin aggregate particles of the present invention have a mean volume particle diameter of 10 to 60 ?m, and the percentage of particles having a particle diameter of 10 to 60 ?m is at least 50 vol %. The moisture absorption coefficient is 1.5 wt % or less when being retained for 24 hours under conditions of 30° C. and a relative humidity of 97.0±0.4%. A plastisol comprising 100 weight parts of the vinyl chloride-based resin aggregate particles and 160 weight parts of di-2-ethylhexyl phthalate satisfies a relationship of 3??70/?40?1000. Further, in the vinyl chloride-based resin aggregate particles of the present invention, the number of voids having a void size of 1.0 ?m or more per one aggregate particle is less than 5.
    Type: Application
    Filed: March 29, 2012
    Publication date: March 27, 2014
    Applicant: KANEKA CORPORATION
    Inventors: Takashi Ueda, Fumihiro Mitamura, Hiroshi Saito, Morio Ishihara