Patents by Inventor Kentaro Nobori

Kentaro Nobori 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).

  • Method of producing chlorinated rubber
    Patent number: 5143980
    Abstract: A method of producing organic solvent-soluble chlorinated rubber is disclosed, which is characterized in that, in the method of chlorinating rubber latex with chlorine gas up to 60 to 75% chlorine content in the aqueous medium as it is,(A) nonionic or cationic surfactant is added to rubber latex prior to chlorination and then acid is added to perform the acidifying treatment of latex,(B) rubber latex is chlorinated up to at least not less than 30% chlorine content at a temperature of not higher than 50.degree. C. blocking off the light in the first step of chlorination, and(C) remaining chlorination is performed while irradiating ultraviolet rays in the second step of chlorination. The chlorinated product is also claimed.
    Type: Grant
    Filed: April 5, 1991
    Date of Patent: September 1, 1992
    Assignee: Sanyo-Kokusaku Pulp Co., Ltd.
    Inventors: Itsuo Kimura, Kentaro Nobori, Shigeki Hikasa