Foam absorber

Details Foam absorber Foam absorber

1991-08-26

1992-09-29

Foelak, Morton

Compositions

Electrically conductive or emissive compositions

Elemental carbon containing

521 52, 521 54, 521 82, 521 92, 521 99, 521123, 521135, 521 78, 252503, 252508, 252514, C08J 938, C08J 940, C08J 942

Patent

active

051512220

ABSTRACT:
A foam absorber having electromagnetic energy attenuation characteristics comprising an open cell reticulated polyurethane foam impregnated with a conductive ink applied to a surface of the foam substrate. The conductive ink is applied as by spraying to a surface of the foam, coating such surface and gradiently loading the foam with the ink by penetration of the ink in gradually decreasing amount into the foam to a final depth therein. The conductive ink is comprised of an epoxy resin carrier and a combination of carbon and a metal such as silver, copper or nickel, preferably silver. The ink is applied as a curable mixture containing a solvent, to the foam substrate, the solvent is evaporated following coating and penetration of the ink into the foam, and the epoxy carrier of the ink in the foam substrate is cured.

REFERENCES:
patent: 2514141 (1950-07-01), Phillips
patent: 4929969 (1990-05-01), Morris
patent: 4980004 (1990-10-01), Hill
patent: 4985467 (1991-01-01), Kelly et al.
patent: 5034422 (1991-07-01), Triolo et al.

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