Fire barrier compositions and composites

Details Fire barrier compositions and composites Fire barrier compositions and composites

1977-06-14

1981-03-10

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

260 4585R, 260 4585V, 428251, 428256, 428260, 428266, 428268, 428273, 428408, 428417, 428418, 428435, 428920, 428921, 528353, B32B 700

Patent

active

042554837

ABSTRACT:
Fire barrier composition particularly applicable as an acoustic panel-fire wall structure in aircraft, capable of withstanding a 2,000.degree. F. flame temperature, comprising incorporating a silica-containing material such as silicic acid or the reaction product of silicic acid and maleic anhydride, into a resin, particularly a polyimide resin. The resulting silica-containing resin, e.g. silicic acid-filled polyimide, is then applied to a substrate such as graphite fiber or glass cloth, to form a composite structure, which is then cured. The resulting cured composite when subjected to high temperature, e.g. a 2,000.degree. F. flame temperature, forms silicon carbide and/or silicon nitride, in situ, which stabilizes any char that forms.

REFERENCES:
patent: 3457214 (1969-07-01), Modie
patent: 3488319 (1970-01-01), Miller
patent: 3523056 (1970-08-01), Horning
patent: 3565851 (1971-02-01), Neuroth
patent: 3582458 (1971-06-01), Haller
patent: 3604257 (1971-09-01), Serlin
patent: 3642681 (1972-02-01), Hermes
patent: 3644135 (1972-02-01), Speyer
patent: 3649588 (1972-03-01), Skipton
patent: 3700538 (1972-10-01), Kennedy
Condensed Chemical Dictionary, 8th Edition, Gessner G. Hawley.

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