Polyimide foams

Details Polyimide foams Polyimide foams

1981-04-10

1982-06-01

Foelak, Morton

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

20415919, 521180, 521189, 528183, 528329, 528352, 528353, C08F 800

Patent

active

043326560

ABSTRACT:
Copolymide foams derived from a diester of 3,3',4,4'-benzophenonetetracarboxylic acid, an aromatic diamine, and a heterocyclic diamine. A molar concentration of the heterocyclic diamine approaching but not exceeding 0.42 is employed. This results in a flexible foam with a homogeneous cellular structure and a reduced compression set loss.

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

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