Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1994-12-15
1996-11-05
Thibodeau, Paul J.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
428402, 428404, 428469, 106400, 106403, 106415, 359580, 359585, 359586, 359589, B32B 1502, B32B 1504, G02B 110, G02B 528
Patent
active
055716245
ABSTRACT:
A color-shifting paint comprising a polymeric paint medium and a plurality of colored interference thin film platelets dispersed in the paint medium. Each platelet being characterized in that platelets has first and second generally planar outer surfaces and an edge thickness perpendicular to the first and second generally planar outer surfaces. Each platelet is comprised of a metal reflecting layer having first and second surfaces. A multilayer interference structure is disposed on each of the first and second surfaces of the metal reflecting layer to provide a symmetrical platelet. The multilayer interference thin film structure comprises a pair of layer consisting of a dielectric layer formed of a dielectric material and a semi-opaque layer. with the dielectric layer directly adjacent to the metal reflecting layer. The thickness of the dielectric layer determines the color and the dielectric material determines the degree of color shift. The platelets have an aspect ratio of at least 2:1 for the longest planar dimension of the first and second outer surfaces in comparison to the edge thickness of the platelets, and have a maximum dimension on any of said surfaces ranging from 2-200 microns.
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Coombs Paul G.
Fisher Shari P.
Phillips Roger W.
Chen Vivian
Flex Products, Inc.
Thibodeau Paul J.
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