Lustrous black interference pigments
AssigneeMerck Patent GmbH
InventorsManuela Loch, Nicole Schupp, Ralf Anselmann, Lilia Heider
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Abstract
The present invention relates to lustrous black interference pigments based on a substrate mixture, characterised in that it has (A) a coating of Fe3O4 (B) a colorless coating consisting of one or more layers each having a refractive index of n≦1.8, (C) optionally a coating with an absorbent, high-refractive-index material which only covers part of the surface, and optionally (D) an outer protective layer, and to the use thereof in paints, coatings, powder coatings, printing inks, plastics, ceramic materials, glasses, for the laser marking of papers and plastics, in cosmetic formulations and for the preparation of pigment compositions and dry preparations.
Claims19
Lustrous black interference pigments comprising a mixture of different substrates having
- (A) a coating of Fe3O4
- (B) a colorless coating consisting of one or more layers each having a refractive index of n<1.8,
- (C) a coating with an absorbent, high-refractive-index material which contains Fe3O4, a black sulfide, a black oxynitride or a mixture thereof, and which only covers part of the underlying surface, and
- (D) optionally an outer protective layer.
Dependencies are inferred from the claim text.