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US 6,620,233 B1Granted
Goniochromatic luster pigments which are based on titanium dioxide-coated siliceous platelets heated in a reductive atmosphere
AssigneeBASF SE
InventorsOliver Seeger, Raimund Schmid, Norbert Mronga, Jörg Adel
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Abstract
Goniochromatic luster pigments are based on titanium dioxide-coated silicatic platelets which have been heated in a reducing atmosphere and which comprise at least one layer packet comprising A) a colorless coating having a refractive index n≦1.8 and B) a coating which has a refractive index n≧2.0, which includes iron(III) oxide and which selectively absorbs visible light.
Claims10
A goniochromatic luster pigment based on titanium dioxide-coated silicatic platelets which have been heated in a reducing atmosphere and which comprise at least one layer packet, said pigment comprising
- A) a colorless coating having a refractive index n≦1.8 and
- B) a coating which has a refractive index n≧2.0, which includes iron (III) oxide and which selectively absorbs visible light.
Dependencies are inferred from the claim text.