Patents Assigned to Fiber-Cote Corporation
  • Urethane oligomers and polyurethanes
    Patent number: 5175231
    Abstract: A urethane is formed in a new way, without requiring the use of isocyanates. The urethane is formed by reacting a compound containing a plurality of cyclocarbonate groups with a diamine in which the two amine groups have different reactivities with cyclocarbonate, so as to form a urethane oligomer with amine end groups. The urethane oligomer can then be reacted in several different ways to form polyurethane.
    Type: Grant
    Filed: April 17, 1992
    Date of Patent: December 29, 1992
    Assignee: Fiber-Cote Corporation
    Inventors: Leonid Rappoport, Roger D. Brown