Patents by Inventor Kayoko Ohtera

Kayoko Ohtera 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).

  • Aqueous emulsion of fluorocarbon polymer and method for producing the same
    Patent number: 5700859
    Abstract: An aqueous emulsion of fluorocarbon polymer according to the present invention is characterized by that the emulsion comprises a sodium dialkylsulfosuccinic acid of not less than 1.5% by weight relative to the fluorocarbon polymer, and an alkyleneglycol. A method for producing a stabilized aqueous emulsions of fluorocarbon polymer according to the present invention comprises mixing an aqueous emulsion of fluorocarbon polymer obtained by an emulsion polymerization process with a sodium dialkylsulfosuccinic acid dissolved in an alkyleneglycol or an aqueous solution of the alkyleneglycol. A novel aqueous emulsion of fluorocarbon polymer having excellent mechanical stability and thermal stability is obtainable.
    Type: Grant
    Filed: February 15, 1996
    Date of Patent: December 23, 1997
    Assignee: DuPont-Mitsui Fluorochemicals Co., Ltd.
    Inventors: Masatsune Ogura, Shizuo Chiba, Kayoko Ohtera