Polyimide compositions and processes

Details Polyimide compositions and processes Polyimide compositions and processes

1989-12-26

1990-07-31

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

521183, 521184, 521185, 521189, 521915, 521 505, 528220, 528229, 528331, 528341, 528353, H05B 100

Patent

active

049449028

ABSTRACT:
A copolyimide foam comprising the reaction product of one or more of an aromatic tetracarboxylic acid and a compound of the formula: ##STR1## where x is an integer from 1 to 12 and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and are hydrogen or C.sub.1 to C.sub.6 linear or branched alkyl a mixture thereof with two or more diamines at least one of which being a heterocyclic diamine having a nitrogen atom in the ring and the other being a para- or meta-substituted aromatic diamine free of aliphatic substitution.
Processes for producing the above copolyimide foam are also disclosed.

REFERENCES:
patent: Re30213 (1980-02-01), Gagliani et al.
patent: 4241193 (1980-12-01), Gagliani
patent: 4315077 (1982-02-01), Gagliani et al.

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