Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1991-03-22
1992-06-23
Cannon, James C.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
156246, 156278, 156289, 1563071, 156313, 428288, 4284735, 4289088, B32B 2708, B32B 2712, B32B 3300
Patent
active
051241994
ABSTRACT:
A self-supporting film of a curable fluorine-containing aromatic polyimide precursor resin is applied to and cured at elevated temperature and pressure on one or more outer surfaces of a reinforced substrate. The substrate is (1) a prepreg lay-up of (a) reinforced plies of a curable aromatic polyimide precursor or (b) fibers impregnated with a cured polyimide powder, or (2) a composite previously formed by curing a lay-up of a reinforced plies of a curable aromatic polyimide precursor. The resultant cured coating improves the erosion resistance of the composites so formed. Use of such films avoids the difficulties experienced when using conventional spray coating procedures.
REFERENCES:
patent: 3356648 (1967-12-01), Rogers
patent: 3849226 (1974-11-01), Butz
patent: 3959350 (1976-05-01), Rogers
patent: 4913759 (1990-04-01), Wright
Lambert Jules A.
O'Quinn Alethea H.
Onorato Sharon M.
Cannon James C.
Ethyl Corporation
Hammond Richard J.
Hansen Richard L.
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