Noble metal clad Ni/C conductive fillers and conductive polymers made therefrom
OwnerKarel Hajmrle, Jones Y. Zhang +1inventors
InventorsKarel Hajmrle, Jones Y. Zhang, Brian William Callen
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Abstract
There is provided a particulate conductive filler which comprises a noble metal coating formed over a non-noble metal coating over an inner carbon-based core. The conductive filler is used in conjunction with a polymer matrix to form composite materials for conductive applications.
Claims23
A particulate conductive filler for use with a polymer matrix to form composite materials wherein each particle comprises:
- a central carbon-based core of composition greater than 50% carbon by weight, a non-noble metal coating on said central carbon-based core;
- and
- an outer noble metal coating on said non-noble metal coating.
A composite material comprising;
- a polymer matrix having a filler therein which comprises particles formed of a central carbon-based core, a non-noble metal coating on said central carbon-based core, and an outer noble metal coating on said non-noble metal coating.
A method of providing EMI shielding for application to a substrate comprising the steps of forming a composite of a polymer matrix and a particulate filler uniformly dispersed in the polymer matrix, said particulate filler consisting essentially of a central carbon-based core of composition greater than 50% carbon by weight, a non-noble metal coating on said central carbon-based core, and an outer noble metal coating on said non-noble metal coating.
Dependencies are inferred from the claim text.