Patents Examined by Duc Devon
  • Low temperature active aliphatic aromatic polycarbodiimides
    Patent number: 5008363
    Abstract: A mixed aliphatic/aromatic polycarbodiimide prepared by first polymerizing an aliphatic isocyanate or mixture thereof, optionally in the presence of a polyfunctional isocyanate; arresting polymer chain growth by reaction with a stoichiometrically deficient amount of a monofunctional isocyanate-reactive compound, followed by further polymerization with an aromatic diisocyanate.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: April 16, 1991
    Assignee: Union Carbide Chemicals and Plastics Technology Corporation
    Inventors: Charles B. Mallon, Howard Chu