Closed cell polyimides

Details Closed cell polyimides Closed cell polyimides

1975-05-27

1978-01-24

Foelak, Morton

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 65, C08J 912

Patent

active

040703126

ABSTRACT:
Closed cell polyimide foams. Methods of making such foams from precursors derived from a benzophenonetetracarboxylic acid diester and a mixture of diamines in which the precursor is molded to shape and cured, hydrated, and heated until a porous, closed cell structure develops.

REFERENCES:
patent: 3249561 (1966-05-01), Hendrix
patent: 3506583 (1970-04-01), Boram et al.
patent: 3726834 (1973-04-01), Acle, Jr.
patent: 3793281 (1974-02-01), Acle, Jr.

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