Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1980-09-25
1982-12-21
Hoke, Veronica P.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
427386, 427387, 4273855, 4274073, 4273898, 428268, 428490, 524 84, 524100, 524111, 524, B32B 2738, B32B 2736, B32B 2734, B32B 2730, B32B 2728, B32B 2718, C08K 553, C08K 550
Patent
active
043649912
ABSTRACT:
Highly fire resistant composites or laminates particularly applicable as structural components in aircraft, e.g. in the engine nacelle, as part of the acoustic panel-fire wall structure, and capable of withstanding a 2,000.degree. F. flame temperature, comprising incorporating an additive in the form of a phosphorylated amide, into a resin, e.g., a polyimide or an epoxy resin, such additive being soluble in the resin. The resulting resin containing the additive, e.g., phenyl phosphonic acid diamide, is then applied to or impregnated into a substrate such as glass fiber cloth or graphite fiber, to form a composite structure which is then cured. The resulting cured composite when subjected to high temperatures of the order of, e.g., a 2,000.degree. F. flame temperature, forms a resin char of reduced thermal conductivity which holds the fibers of the laminate together and maintains the structural stability and integrity of the laminate.
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patent: 4134877 (1979-01-01), Morgan et al.
Byrd Norman R.
Peek Daniel C.
Geldin Max
Hoke Veronica P.
McDonnell Douglas Corporation
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