Magnetic articles
An article including a magnetic-containing layer having a first surface and a second surface opposite the first; a first reflector layer external to the first surface of the magnetic-containing layer; a second reflector layer external to the second surface of the magnetic-containing layer; a first selective light modulator layer external to the first reflector layer; a second selective light modulator layer external to the second reflector layer; a first absorber layer external to the first selective light modulator layer; and a second absorber layer external to the second selective light modulator layer; wherein at least one of the first and second selective light modulator layers comprises at least one of a curing agent, and at least one coating aid is disclosed. Methods of making the disclosed article are also disclosed.
1. An article comprising:
a magnetic-containing layer having a first surface and a second surface opposite the first surface;
a first reflector layer external to the first surface of the magnetic-containing layer;
a second reflector layer external to the second surface of the magnetic-containing layer;
a first selective light modulator layer external to the first reflector layer;
a second selective light modulator layer external to the second reflector layer;
a first absorber layer external to the first selective light modulator layer; and
a second absorber layer external to the second selective light modulator layer;
wherein at least one of the first and second selective light modulator layers comprises at least one of a curing agent, and at least one coating aid.
2. The article of claim 1 , wherein the curing agent is at least one of solvents, radical generators (by energy or chemical), acid generators (by energy or chemical), condensation initiators, and acid/base catalysts.
3. The article of claim 1 , wherein the at least one coating aid includes leveling agents, wetting agents, defoamers, adhesion promoters, antioxidants, UV stabilizers, curing inhibition mitigating agents, antifouling agents, corrosion inhibitors, photosensitizers, secondary crosslinkers, and infrared absorbers for enhanced infrared drying.
4. The article of claim 1 , wherein the magnetic-containing layer comprises a polymer containing iron oxide particles.
5. The article of claim 1 , wherein the first and second selective light modulator layers each independently include a solvent.
6. The article of claim 1 , wherein the first and second selective light modulator layers each independently have less than about 3% variation in thickness across the layer.
7. The article of claim 1 , wherein the first and second selective light modulator layers each independently have less than about 1% variation in thickness across the layer.
8. The article of claim 1 , wherein the first and second selective light modulator layers each independently have a thickness of from about 1 nm to about 10000 nm.
9. A color shifting colorant comprising:
the article of claim 1 ; and a liquid medium.
10. An article comprising:
a magnetic containing layer having a first surface and a second surface opposite the first surface;
a first reflector layer external to the first surface of the magnetic-containing layer;
a second reflector layer external to the second surface of the magnetic-containing layer;
a first selective light modulator layer external to the first reflector layer;
a second selective light modulator layer external to the second reflector layer;
a first absorber layer external to the first selective light modulator layer; and
a second absorber layer external to the second selective light modulator layer;
wherein at least one of the first and second selective light modulator layers comprises at least one of a curing agent, and at least one oxygen inhibition mitigation composition.
11. A color shifting colorant comprising:
the article of claim 10 ; and a liquid medium.
12. The article of claim 10 , wherein the curing agent utilizes at least one of ultraviolet light, visible light, infrared, or electron beam energy.
13. The article of claim 10 , wherein the oxygen inhibition mitigation composition includes at least one of an acrylate monomer and at least one acrylate oligomer.
14. A method for forming an article comprising:
depositing on a substrate a first absorber layer;
depositing on the first absorber layer a first selective light modulator layer;
depositing on the first selective light modulator layer a first reflector layer;
depositing on the first reflector layer a magnetic-containing layer;
depositing on the magnetic-containing layer a second reflector layer;
depositing on the second reflector layer a second selective light modulator layer; and
depositing on the second selective light modulator layer a second absorber layer;
wherein at least one of the first and second selective light modulator layers comprises at least one of a curing agent, and at least one coating aid.
15. The method of claim 14 , wherein the first and second selective light modulator layers each independently have a wet film thickness ranging from about 0.1 μm to about 500 μm.
16. The method of claim 15 , wherein the wet film thickness ranges from about 0.1 μm to about 5 μm and results in a stable first and second selective light modulator layer.
17. The method of claim 14 , wherein the magnetic-containing layer is deposited using a liquid coating process.
18. The method of claim 14 , wherein the first and second selective light modulator layer each independently comprise a solvent and the liquid coating process further comprises evaporating the solvent from the deposited first and second selective light modulator layer and curing.
19. The method of claim 14 , wherein the liquid coating process includes a ratio of slot gap to wet film thickness of about 9 at a coating speed of about 100 m/min.
20. The method of claim 14 , wherein the liquid coating process includes a ratio of slot gap to wet film thickness of about 20 at a coating speed of about 50 m/min.