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US 9,845,398 B2Granted
Magnetic multilayer pigment flake and coating composition
AssigneeViavi Solutions Inc.
InventorsVladimir P. Raksha, Paul T. Kohlmann, Cornelis Jan Delst, Paul G. Coombs
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Abstract
The present invention provides a magnetic multilayer pigment flake and a magnetic coating composition that are relatively safe for human health and the environment. The pigment flake includes one or more magnetic layers of a magnetic alloy and one or more dielectric layers of a dielectric material. The magnetic alloy is an iron-chromium alloy or an iron-chromium-aluminum alloy, having a substantially nickel-free composition. The coating composition includes a plurality of the pigment flakes disposed in a binder medium.
Claims21
A multilayer pigment flake comprising:
- one or more layers of a ferromagnetic or ferrimagnetic alloy;
- one or more dielectric layers;
- and
- a reflecting layer,
- wherein the ferromagnetic or ferrimagnetic alloy is an iron-chromium alloy or an iron-chromium-aluminum alloy.
2 more elements
Dependencies are inferred from the claim text.