Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1994-12-06
1996-04-09
Ryan, Patrick J.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
42840224, 428403, 428404, 428406, 428407, B32B 1500
Patent
active
055060536
ABSTRACT:
Infrared (IR) reflective radio frequency (RF) transparent coating materials are comprised of coated microspheres dispersed as discrete pigment particles in an IR and RF transparent film forming binder. Each microsphere is comprised of a dielectric core, a layer of IR reflective RF conductive material on the core, and an IR and RF transparent layer of insulating material coated over and encapsulating the reflective layer. The insulating layer prohibits transmission of currents between the conductive layers and the spheres are of sufficiently small size in relation to RF wavelengths as to permit passage of RF energy through the coating. The coated microspheres are visually colored, and being spherical, provide on a coated object a film or coating that is visually colored and highly diffuse, as well as being IR reflective and RF transparent. Methods of making the discrete spherical pigment particles comprise the steps of levitating microspheres in a coating deposition chamber and depositing onto the levitated spheres the desired coating or coatings.
REFERENCES:
patent: 4593007 (1986-06-01), Novinski
patent: 4711814 (1987-12-01), Teichmann
patent: 5204163 (1993-04-01), Nakatsuka et al.
patent: 5366664 (1994-11-01), Varadan et al.
General Atomics
Lee Kam F.
Ryan Patrick J.
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