Storage stable polyimide precursor solutions and method of prepa

Details Storage stable polyimide precursor solutions and method of prepa Storage stable polyimide precursor solutions and method of prepa

1988-09-26

1990-10-02

Anderson, Harold D.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524379, 524391, 524606, 524607, 528125, 528126, 528128, 528172, 528183, 528185, 528188, C08L 7904

Patent

active

049608240

ABSTRACT:
Storage stable polyimide precursors are prepared from diesters of certain tetracarboxylic acids, including pyromellitic acid and 2,2-bis[4-(3,4-dicarboxyphenoxy)-phenyl]propane, and m-phenylenediamine, p-phenylenediamine, 4-aminophenyl ether or mixtures thereof. These polyimide precursors may be cured to form flexible polyimides useful in composite preparation.

REFERENCES:
patent: 3312663 (1967-04-01), Sorenson
patent: 3700649 (1972-10-01), Boram et al.
patent: 4417044 (1983-11-01), Parekh
Bell, Polymer Letters, 5, 941-946. (1967).
Serafini et al., J. App. Poly. Sci., 16, 905-915 (1972).
Serafini et al., App. Poly. Symp. #22, 89-100 (1973).
Scrafini et al., Status Review of PMR Polyimides, ACS Symposium Series, 132, 15-24 (1980).

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