Back to results
US 8,906,504 B2Granted
Pigments
AssigneeMerck Patent GmbH
InventorsHelge Bettina Kniess, Gerhard Pfaff
Life of this patent
Estimating the term…
Abstract
The present invention relates to pigments comprising a substrate and, applied thereto, an iron-containing coating comprising metallic iron, process for the preparation of the pigments according to the invention, and the use thereof.
Claims19
A pigment comprising
- a substrate comprising a titanium oxide, synthetic mica, natural mica, a phyllosilicate, glass, SiO2, Al2O3, graphite, and/or BiOCl, and
- on the substrate an iron-containing coating consisting of FeO and/or Fe3O4 and metallic iron, wherein the metallic iron is present in an amount of 60-85% by weight of the iron-containing coating, and wherein said iron-containing coating has a thickness of 1-300 nm,
- wherein the resultant pigment is magnetisable and/or electrically conductive and exhibits interference effects.
Dependencies are inferred from the claim text.