Conformal coatings comprising carbon nanotubes
First Claim
1. A conformal coating that provides EMI shielding, wherein said coating comprises:
- an insulating layer; and
a conductive layer wherein said conductive layer comprises an electrically conductive material.
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Abstract
The invention is directed to conformal coatings that provide excellent shielding against electromagnetic interference (EMI). A conformal coating comprises an insulating layer and a conducting layer containing electrically conductive material. The insulating layer comprises materials for protecting a coated object. The conducting layer comprises materials that provide EMI shielding such as carbon black, carbon buckeyballs, carbon nanotubes, chemically-modified carbon nanotubes and combinations thereof. The insulating layer and the conductive layer may be the same or different, and may be applied to an object simultaneously or sequentially. Accordingly, the invention is also directed to objects that are partially or completely coated with a conformal coating that provides EMI shielding.
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Citations
65 Claims
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1. A conformal coating that provides EMI shielding, wherein said coating comprises:
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an insulating layer; and
a conductive layer wherein said conductive layer comprises an electrically conductive material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A coated substrate with EMI shielding comprising:
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a) a substrate; and
b) conformal coating disposed on said substrate that provides EMI shielding, wherein said coating comprises;
an insulating layer; and
a carbon nanotube-containing layer disposed on said insulating layer, wherein said carbon nanotube-containing layer comprises a plurality of carbon nanotubes. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method for imparting EMI shielding to a substrate, comprising coating said substrate with a conformal coating wherein said conformal coating comprises:
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an insulating layer; and
a nanotube-containing layer disposed on said insulating layer, wherein said nanotube-containing layer comprises a plurality of carbon nanotubes. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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- 48. A conformal coating that provides EMI shielding, wherein said coating comprises a plurality of carbon nanotubes and a polymer selected from the group consisting of acrylics, epoxies, silicone, polyurethane, and parylene.
- 57. A dispersion comprising a plurality of carbon nanotubes and a conformal coating material selected from the group consisting of polyurethanes, parylene, acrylics, epoxies and silicone.
Specification