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US 7,842,130 B2Granted
Complex inorganic effect materials
AssigneeBASF SE
InventorsCurtis J. Zimmermann, Frank Mazella
Life of this patent
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Abstract
The present invention relates to a complex inorganic color effect pigment material based on multiply coated platelet-shaped substrates wherein one of the layers is a complex inorganic colored pigment. The present color effect pigment may be used in automotive applications, security inks, and decorative coatings.
Claims8
A color effect material comprising a laminar substrate having at least one layer sequence comprising:
- (A) a layer having a high refractive index disposed on the substrate;
- (B) a layer having a low refractive index disposed on said layer (A);
- (C) a layer having a high refractive index disposed on said layer (B);
- and (D), an external layer disposed on said layer (C);
- wherein at least one of said layers (A) or (C) comprises copper chromite;
- and wherein the outermost layer of said color effect material contains no copper chromite.
3 more elements
Dependencies are inferred from the claim text.