Recurable and cured cellular materials

Details Recurable and cured cellular materials Recurable and cured cellular materials

1989-08-07

1990-07-24

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521185, 521189, 521918, 264 53, C08J 936

Patent

active

049435990

ABSTRACT:
Cured polyimide foam is exposed to an atmosphere of steam at elevated temperature and pressure for a period of time sufficient to convert the foam into a non-flexible, non-resilient recurable cellular material. Preferably the process is conducted such that the cellular material is recurable to a flexible resilient foam having tensile strength properties similar to the tensile strength properties of the original cured polyimide foam subjected to the process. Before recuring, the non-flexible, non-resilient recurable cellular material may be shaped or contoured, and then recured. For example, by impressing shaped articles into the recurable material followed by recuring, shipping/storage containers for the articles are readily produced.

REFERENCES:
patent: 4070312 (1978-01-01), Gagliani et al.
patent: 4319000 (1982-03-01), Gagliani et al.
patent: 4708972 (1987-11-01), Gagliani et al.

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