Patents by Inventor Toru YAMATANI

Toru YAMATANI 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: 11198783
    Abstract: Provided is a dope used when a film containing an acrylic-based resin and a core-shell type graft copolymer is made by a solution casting method, in which turbidity is less likely to occur despite the use of a core-shell type graft copolymer having a core layer with a large particle diameter. A dope for producing a film by a solution casting method contains a thermoplastic acrylic-based resin, a graft copolymer, and a solvent. In this dope, the graft copolymer has a core layer and a shell layer, the core layer has an average particle diameter of 125 to 400 nm, the graft copolymer has a degree of swelling by methyl ethyl ketone of 3.5 or more, and the solvent has a hydrogen bonding term ?H in a Hansen solubility parameter of 6.0 or more and 8.0 or less.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: December 14, 2021
    Assignee: KANEKA CORPORATION
    Inventors: Fuminobu Kitayama, Naoto Kataoka, Toru Yamatani, Katsumi Yamaguchi
  • Publication number: 20200172720
    Abstract: Provided is a dope used when a film containing an acrylic-based resin and a core-shell type graft copolymer is made by a solution casting method, in which turbidity is less likely to occur despite the use of a core-shell type graft copolymer having a core layer with a large particle diameter. A dope for producing a film by a solution casting method contains a thermoplastic acrylic-based resin, a graft copolymer, and a solvent. In this dope, the graft copolymer has a core layer and a shell layer, the core layer has an average particle diameter of 125 to 400 nm, the graft copolymer has a degree of swelling by methyl ethyl ketone of 3.5 or more, and the solvent has a hydrogen bonding term ?H in a Hansen solubility parameter of 6.0 or more and 8.0 or less.
    Type: Application
    Filed: May 16, 2018
    Publication date: June 4, 2020
    Applicant: KANEKA CORPORATION
    Inventors: Fuminobu KITAYAMA, Naoto KATAOKA, Toru YAMATANI, Katsumi YAMAGUCHI