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US 5,702,518 AGranted
Gold pigments
AssigneeMerck Patent Gesellschaft mit ceschrankter Haftung
InventorsReiner Vogt, Klaus Bernhard, Gerhard Pfaff
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Abstract
Gold pigments of high opacity and processes for their preparation and use.
Claims9
A gold pigment comprising a substrate with multiple layers thereon, including a layer of titanium dioxide which is doped with carbon obtained by thermal decomposition of organic colloidal particles and an iron(III) oxide layer on the doped titanium dioxide layer.
Dependencies are inferred from the claim text.