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US 5,364,467 AGranted
Luster pigments based on multiply coated plateletlike metalic substrates
AssigneeBASF SE
InventorsRaimund Schmid, Norbert Mronga
Life of this patent
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Abstract
Luster pigments useful for coloring paints, printing inks, plastics, glasses, ceramic products and decorative cosmetic preparations are based on multiply coated plateletlike metallic substrates comprising A) a first, colorless or selectively absorbing layer of metal oxide, B) a second, nonselectively absorbing layer of carbon, metal and/or metal oxide, and C) if desired a third, colorless or selectively absorbing layer of metal oxide.
Claims14
A luster pigment, comprising a platelet-shaped metallic substrate, coated with:
- (A) a first colorless or selectively absorbing layer of metal oxide, and
- (B) a nonselectively absorbing layer selected from the group consisting of carbon, iron, molybdenum, chromium, tungsten, magnetite, nickel oxide, cobalt oxide, vanadium oxide and mixtures thereof.
A luster pigment, comprising a platelet-shaped metallic substrate, coated with:
- (A) a first colorless or selectively absorbing layer of metal oxide selected from the group consisting of titanium oxide, zirconium oxide, silicon oxide, tin oxide, chromium oxide, iron oxide and mixtures thereof, and
- (B) a nonselectively absorbing layer selected from the group consisting of carbon, iron, molybdenum, chromium, tungsten, nickel oxide, cobalt oxide, vanadium oxide and mixtures thereof, and
- (C) optionally, desired, a second colorless or selectively absorbing layer of metal oxide selected from the group consisting of titanium oxide, zirconium oxide, silicon oxide, tin oxide, chromium oxide, iron oxide and mixtures thereof.
Dependencies are inferred from the claim text.