Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
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.
Byrd Norman R.
Donahoe John K.
Bell James J.
Geldin Max
McDonnell Douglas Corporation
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