Patents by Inventor Kesao Ide

Kesao Ide 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 producing .alpha., .omega.-hydroxyfluoroalkylpolysiloxanes
    Patent number: 5087683
    Abstract: A process for producing an .alpha., .omega.-hydroxyfluoroalkylpolysiloxane comprising polymerizing a cyclotrisiloxane in the presence of a polymerization catalyst of lithium hydroxide or a lithium salt of a diorganosiloxane, and a promoter of phtalic diorganoester and/or ortho-dialkoxybenzene, and stopping the polymerization by adding a neutralizer is disclosed. This process very easily obtains the .alpha., .omega.-hydroxyfluoroalkylpolysiloxane of a desired viscosity.If a chloroethane of the general formula CHX, CCl X.sub.2 (X is the hydrogen or chlorine atom) is used as the neutralizer, the .alpha., .omega.-hydroxyfluoroalkylpolysiloxane does not exhibit any substantial change of viscosity over time.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: February 11, 1992
    Assignee: Shin-Etsu Chemical Co. Ltd.
    Inventors: Masatoshi Arai, Shinichi Satoh, Kesao Ide