Phenolic-modified epoxy adhesive including the reaction product

Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond

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428273, 428290, 523466, 523468, 525423, 528 94, 528104, 528103, C08G 5962

Patent

active

047770848

ABSTRACT:
Viscous oligomeric epoxy resins can be quickly cured at temperatures of 100.degree. C. by incorporating a hardener that is a blend of (a) the oligomeric reaction product of bisphenol A and bisphenol A monoglycidyl ether and (b) an imidazole. The cured resins are tough and resistant to both moisture and high temperatures. Prepregs, in which glass, graphite or polymeric organic fiber sheets are saturated with these resins, are particularly useful in the repair of damaged aircraft and aerospace structures.

REFERENCES:
patent: 3519576 (1970-07-01), Johnson
patent: 3520905 (1970-07-01), Johnson
patent: 3632836 (1972-01-01), Walker
patent: 3884992 (1975-05-01), Shimizu et al.
patent: 4311661 (1982-01-01), Palmer
patent: 4594291 (1986-06-01), Bertram et al.
patent: 4659779 (1987-04-01), Bagga et al.

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