Patents by Inventor Kyohisa Kotsuma

Kyohisa Kotsuma 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).

  • High speed moisture cure polyurethane sealant
    Patent number: 5055543
    Abstract: Disclosed herein is a one part moisture cure sealant which is cured under an ordinary temperature by reaction with moisture contained in the air. This sealant contains a cure accelerating catalyst of: ##STR1## in a sealing composite containing urethane prepolymer. Due to the action of this catalyst, not only the cure rate is improved but difference in the cure rate between a low-temperature/low-humidity season and a high-temperature/high-humidity season is reduced. This sealant is also excellent in storage stability.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: October 8, 1991
    Assignee: Sunrise Meisei Corporation
    Inventors: Yoshinori Nakano, Kyohisa Kotsuma, Masayoshi Ito