Patents Assigned to I M L Corporation
  • Development of polyimide foams with blowing agents
    Patent number: 4506038
    Abstract: A method of preparing a polyimide foam which includes the steps of: preparing, foaming, and curing a precursor containing at least one alkyl ester of 3,3'4,4'-benzophenonetetracarboxylic acid; a meta- or para-substituted aromatic diamine; a heterocyclic diamine; an aliphatic diamine; and a solid blowing agent. The blowing agent is added to said precursor in a concentration which is sufficient to effect at least one of the following attributes of the foam: cell size, proportion of open cells, cell density, and indentation load deflection.
    Type: Grant
    Filed: December 3, 1982
    Date of Patent: March 19, 1985
    Assignee: I M L Corporation
    Inventors: John Gagliani, Usman A. K. Sorathia, Raymond Lee
  • Methods of preparing polyimides and artifacts composed thereof
    Patent number: 4439381
    Abstract: Methods of converting essentially unpolymerized precursors into polyimides in which the precursors are exposed to microwave radiation. Preheating, thermal post-curing, and other techniques may be employed to promote the development of optimum properties; and reinforcements can be employed to impart strength and rigidity to the final product. Also disclosed are processes for making various composite artifacts in which non-polymeric precursors are converted to polyimides by using the techniques described above.
    Type: Grant
    Filed: May 11, 1981
    Date of Patent: March 27, 1984
    Assignee: I M L Corporation
    Inventors: John Gagliani, Raymond Lee, Anthony L. Wilcoxson