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US 12,421,395 B2Granted
Effect pigments
AssigneeSusonity Commercial GmbH
InventorsLukas Hamm, Carsten Griessmann, Nicole Nelischer, Marita Jekel
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Abstract
Temperature-stable effect pigments based on multicoated flake-form substrates, and the use thereof in paints, coatings, printing inks, plastics and in particular in glazes, enamels, ceramic or glass-like materials.
Claims17
An effect pigment based on a multicoated flake-form substrate, wherein a surface of the substrate has at least one layer sequence comprising:
- (A) a base layer comprising a high-refractive-index coating having a refractive index of n≥1.8;
- (B) a pseudobrookite layer, which may optionally be doped with one or more oxides in amounts of ≤10% by weight, based on the weight of layer (B);
- (C) a low-refractive-index layer having a refractive index of n<1.8;
- (D) a high-refractive-index layer having a refractive index of n>1.8 and consisting of at least 2 different colorless metal-oxide layers;
- (E) a pseudobrookite layer, which may optionally be doped with one or more oxides in amounts of ≤10% by weight, based on the weight of layer (E);
- and optionally
- (F) an outer protective layer;
- wherein layers (C) and (D) have a total combined layer thickness of 50-115 nm, separating layer (B) from layer (E), and
- wherein no phase reactions occur between the individual layers (A) to (F), even at a temperature that is above 900° C .
6 more elements
Dependencies are inferred from the claim text.