Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1994-12-02
1997-08-05
Le, Hoa Van
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106 20R, 106 20D, 106401, 106415, 106436, 106450, 106453, 106 319, 106 3164, C04B 1400
Patent
active
056537921
ABSTRACT:
An article with a surface with a paint film adherent thereto having a liquid medium hardened into a solid to form said paint film and having first and second parallel surfaces with the first parallel surface being adhered to the surface of the article and the second surface exposed to be viewed by the human eye. A plurality of flakes are provided having first and second planar parallel surfaces lying in said paint film with the first and second planar parallel surfaces being parallel to the first and second parallel surfaces of the paint film. The flakes are characterized in that they have physical dimensions such that when the dimensions of the flakes are measured parallel to and perpendicular to the respective first and second planar parallel surfaces, an aspect ratio of at least two-to-one is provided. Each of the flakes has a symmetrical optically variable multilayer thin film interference structure including at least one thick substantially opaque metal reflecting layer having first and second surfaces and a multilayer thin film including at least one thin semi-transparent metal layer and at least one dielectric layer formed of an inorganic material with an index of refraction of 1.65 or less and disposed on each side of the substantially opaque metal reflecting layer. The multilayer thin film structure produces a shift in color between two distinct colors when the angle of incident light on the paint film is shifted between two different angles.
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Use of non-metallic pearlescent pigments to achieve metallic appearence, C.J. Reiger, Polymers, Paint and Colour Journal. vol. 169, May 1979. pp. 38-44.
Ash Gary S.
Mayer Thomas
Phillips Roger W.
Flex Products, Inc.
Le Hoa Van
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