Patents Assigned to Sumitoma Bayer Urethane Co., Ltd.
  • Process for preparing liquid diphenylmethane diisocyanate
    Patent number: 5610408
    Abstract: A process for preparing a liquid MDI, which comprises adding, to MDI, a phospholine catalyst and a phosphorous acid ester of a specified formula and conducting a carbodiimidization reaction.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: March 11, 1997
    Assignee: Sumitoma Bayer Urethane Co., Ltd.
    Inventors: Toshiaki Imokawa, Yoshiharu Kato