Low energy cured composite repair system based on epoxy resin wi

Details Low energy cured composite repair system based on epoxy resin wi Low energy cured composite repair system based on epoxy resin wi

1989-07-07

1992-02-04

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 94, 528117, 528361, 528407, 525423, 525438, 525504, 525534, 525535, 427140, 427196, 4272082, 427386, 156 98, 156285, 1563073, 156323, 156330, C08G 1828, C08G 1881

Patent

active

050861492

ABSTRACT:
A fiber reinforced resin matrix composite material repair system is provided, which critically employs a resin comprising a catalyst of the formula I: ##STR1## with a multifunctional epoxy resin, the resin system being sealed in a water-proofed environment prior to being coated onto a fiber reinforcement. The coated fiber reinforcement is applied over the damaged area, the damaged portion having been removed, and the surrounding surface smoothed. An adhesive is applied to the remaining surface, prior to application of the patch. The resulting patch, which may further include thermoplastic toughening agents and an enhancer, can be directly cured at temperatures below 212.degree. F. to give physical properties similar to the original material.

REFERENCES:
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patent: 4293561 (1981-10-01), Walker
patent: 4335228 (1982-06-01), Beitchman et al.
patent: 4358571 (1982-11-01), Kaufman et al.
patent: 4533715 (1985-08-01), Lee et al.
patent: 4774282 (1988-09-01), Qureshi
patent: 4902752 (1990-02-01), Shimp

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