Patents by Inventor Shinji Hibino

Shinji Hibino 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).

  • Process for the production of polymer microparticles
    Patent number: 8362166
    Abstract: The object of the present invention is to provide a process for producing high-quality polymer microparticles having uniform particle size of the order of several micrometers to tens of micrometers by inverse suspension polymerization at high productivity while keeping excellent dispersion stability without causing aggregation among particles. The process is one for the production of polymer microparticles by inverse polymerization of a vinyl monomer and is characterized in that an oil-soluble oxidizing agent and a water-soluble reducing agent are used as a polymerization initiator and the oil-soluble oxidizing agent is fed after the water-soluble reducing agent is fed.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: January 29, 2013
    Assignee: Taogosei Co., Ltd.
    Inventors: Akihiro Gotou, Hideo Matsuzaki, Shinji Hibino
  • Process for the production of polymer microparticles
    Patent number: 8058370
    Abstract: The object of the present invention is to provide a process for producing high-quality polymer microparticles having uniform particle size of the order of several micrometers to tens of micrometers by inverse suspension polymerization at high productivity while keeping excellent dispersion stability without causing aggregation among particles. The process is one for the production of polymer microparticles by inverse suspension polymerization of a vinyl monomer and includes steps of preparing in a dispersing tank a water-in-oil (W/O) type emulsion in which an organic solvent is a continuous phase and an aqueous solution of a vinyl-based monomer is a dispersing phase, and conducting the inverse suspension polymerization while feeding the water-in-oil (W/O) type emulsion to a continuous stirred tank reactor.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: November 15, 2011
    Assignee: Toagosei Co., Ltd.
    Inventors: Shinji Hibino, Hideo Matsuzaki, Akihiro Gotou
  • PROCESS FOR THE PRODUCTION OF POLYMER MICROPARTICLES
    Publication number: 20110040060
    Abstract: The object of the present invention is to provide a process for producing high-quality polymer microparticles having uniform particle size of the order of several micrometers to tens of micrometers by inverse suspension polymerization at high productivity while keeping excellent dispersion stability without causing aggregation among particles. The process is one for the production of polymer microparticles by inverse polymerization of a vinyl monomer and is characterized in that an oil-soluble oxidizing agent and a water-soluble reducing agent are used as a polymerization initiator and the oil-soluble oxidizing agent is fed after the water-soluble reducing agent is fed.
    Type: Application
    Filed: January 20, 2009
    Publication date: February 17, 2011
    Applicant: Toagosei Co., Ltd.
    Inventors: Akihiro Gotou, Hideo Matsuzaki, Shinji Hibino
  • PROCESS FOR THE PRODUCTION OF POLYMER MICROPARTICLES
    Publication number: 20110015364
    Abstract: The object of the present invention is to provide a process for producing high-quality polymer microparticles having uniform particle size of the order of several micrometers to tens of micrometers by inverse suspension polymerization at high productivity while keeping excellent dispersion stability without causing aggregation among particles. The process is one for the production of polymer microparticles by inverse suspension polymerization of a vinyl monomer and includes steps of preparing in a dispersing tank a water-in-oil (W/O) type emulsion in which an organic solvent is a continuous phase and an aqueous solution of a vinyl-based monomer is a dispersing phase, and conducting the inverse suspension polymerization while feeding the water-in-oil (W/O) type emulsion to a continuous stirred tank reactor.
    Type: Application
    Filed: January 22, 2009
    Publication date: January 20, 2011
    Applicant: TOAGOSEI CO., LTD
    Inventors: Shinji Hibino, Hideo Matsuzaki, Akihiro Gotou