Shielding material of electromagnetic waves

Details Shielding material of electromagnetic waves Shielding material of electromagnetic waves

1983-10-28

1986-04-01

Jacobs, Lewis T.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523216, 523217, 252513, 252514, C08K 308

Patent

active

045798826

ABSTRACT:
The shielding material of electromagnetic waves of the invention is formed f a polymeric material as the matrix and an inorganic powder, e.g. mica flakes, metallized on the surface of the particles with a metal, e.g. nickel, as the conductive dispersant in the matrix. The metallization of the inorganic powder is performed by chemical plating, preferably, after pretreatment with an organic compound having a functional group capable of capturing ions of a noble metal and then with a solution containing a noble metal, preferably, palladium. This pretreatment is effective to increase the firmness of bonding between the metallizing layer and the surface of the particles so that the shielding effect of the material is greatly improved.

REFERENCES:
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patent: 3476530 (1969-11-01), Ehrreich et al.
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patent: 3968056 (1976-07-01), Bolon et al.
patent: 4011360 (1977-03-01), Walsh
patent: 4088801 (1978-05-01), Bolon et al.
patent: 4098945 (1978-07-01), Oehmke
patent: 4233191 (1980-11-01), Reuter et al.
patent: 4496475 (1985-01-01), Abrams

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