Compositions – Electrically conductive or emissive compositions – Elemental carbon containing
Patent
1982-03-29
1984-10-02
Barr, Josephine L.
Compositions
Electrically conductive or emissive compositions
Elemental carbon containing
252506, 252511, 524439, 524440, 524441, 524495, 523137, 523451, 523457, 523458, 523459, 523468, 523440, 523512, 523513, 264104, 264105, H01B 102
Patent
active
044746857
ABSTRACT:
High shielding efficiencies to emissions of electromagnetic interference are achieved with molding compositions comprised of thermosetting resins and a multi-component electroconductive filler system. Compounds having a combination of at least two conductive fillers provide shielding efficiencies of 30 dB of attenuation or more to electromagnetic emissions over a frequency range of 0.5 to 1000 Mhz without adversely affecting mechanical properties and processing capabilities.
REFERENCES:
patent: 3563933 (1971-02-01), Stover
patent: 4115508 (1978-09-01), Hughes
patent: 4197218 (1980-04-01), McKaveney
patent: 4281284 (1981-07-01), Stutz et al.
"Conductive Composites for EMI Shielding", Battelle Columbus Laboratories, 6-14-78.
Barr Josephine L.
Mudd James F.
Occidental Chemical Corporation
Tao James F.
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