Patents by Inventor Toshinori Karasuda

Toshinori Karasuda 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 preparation of chlorinated polyolefin and chlorosulfonated polyolefin
    Patent number: 5378766
    Abstract: A novel process for the preparation of a chlorinated polyolefin having excellent low temperature characteristics and brightness is provided which comprises allowing a polyolefin dissolved or suspended in a solvent to undergo chlorination reaction with chlorine gas or chlorinated sulfuryl in the presence of a radical initiator as a catalyst, characterized in that as said solvent there is used 1,1,2-trichloroethane and the temperature is controlled to 90.degree. C. or lower at the process for removing hydrogen chloride and/or sulfur dioxide by-produced during the reaction from the reaction system.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: January 3, 1995
    Assignee: Tosoh Corporation
    Inventors: Nobuyuki Ito, Katsushige Okayama, Toshinori Karasuda, Yasumichi Miyagawa