Color effect materials and production thereof
AssigneeEngelhard Corporation
InventorsCurtis J. Zimmermann, Vivian K. Doxey, Daniel S. Fuller
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Abstract
A color effect material is composed of a plurality of encapsulated substrate platelets in which each platelet is encapsulated with a first layer selected from the group consisting of silicon, aluminum, titanium nitride and mixtures thereof, which acts as a reflector to light directed thereon, a second layer encapsulating the first layer in which the second layer provides a variable pathlength of light dependent on the angle of incidence of light impinging thereon and a third layer being selectively transparent to light directed thereon.
Claims40
A color effect material comprising a platelet-shaped substrate encapsulated with:
- (a) a highly reflective first layer to light directed thereon;
- and being selected from the group consisting of silicon, aluminum, titanium nitride and mixtures thereof;
- and
- (b) a second layer encapsulating the first layer and providing a variable pathlength for light dependent on the angle of incidence of light impinging thereon;
- and
- (c) a third layer encapsulating the second layer which is selectively transparent to light directed thereon.
A method of making a color effect material comprising:
- (a) encapsulating a platelet-shaped substrate with a first layer highly reflective to light directed thereon and selected from the group consisting of silicon, aluminum, titanium nitride and mixtures thereof;
- (b) encapsulating the first layer with a second layer providing a variable pathlength for light dependent on the angle of incidence of light impinging thereon;
- and
- (c) encapsulating the second layer with a third layer selectively transparent to light directed thereon.
Dependencies are inferred from the claim text.