Merck Patent Gmbh

Merck Patent Gesellschaft MIT Beschr&auml;nkter Haftung

Michael Uhlig

Gerhard Pfaff

Stephanie Andes

Reiner Vogt

Martin Friz

Christoph Schmidt

Karl Osterried

Katsuhisa Nitta

Gerd Bauer

Gerald Fuchs-Pohl

Norbert Sch&uuml;l

Siegfried Raabe

Helge-Bettina Kniess

G&uuml;nther Brenner

Nitta Katsuhisa

The invention relates to multilayered luster pigments based on metallic substrates, which are completely surrounded by a plurality of layers, where these layers comprise at least one layer pack (A) having a colorless dielectric layer of a material with a refractive index n of &#x2266;1.8, and a colorless dielectric layer of a material with a refractive index n of &#x3e;1.8, and a selectively or non-selectively absorbent layer (B), and to a process for their production, and to their use.

Multilayered luster pigments

The invention relates to a pigment with a metallic luster, comprising a plate-like non-metallic substrate having a thickness lower an 200 nm, which is entirely coated with a metallic layer.

Pigment with a metallic luster

A pigment with a metallic luster, comprising a wafer-like substrate made of aluminium dioxide having a thickness of more than 250 nm and less than 1 &#x3bc;m, which is fully enveloped by a metal layer.

The invention relates to a platelet-shaped pigment having high luster and high covering power or high transparency, consisting of a transparent, inorganic, platelet-shaped matrix which can contain an additional constituent, characterized in that the additional constituent is a soluble or insoluble colorant and in that the matrix is coated at least on one side with one or more thin, transparent or semi-transparent reflective layers of metal oxides or metals to achieve the luster.

Colored and coated plateletlike pigments

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Darmstadt, Germany

Michael Uhlig