Lustrous interference pigments with black absorption color
AssigneeEngelhard Corporation
InventorsCarmine V. DeLuca JR., William P. Kurtenbach, Christine Mans
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Abstract
A lustrous interference pigment with a black absorption color is obtained by forming a mica coated with hydrous titanium, iron and cobalt or chromium oxides, calcining the coated mica and then coating the resulting product with hydrous titanium and/or iron oxides and calcining the resulting product.
Claims8
A lustrous interference pearlescent pigment having a black absorption color comprising mica platelets coated with a first layer comprising a mixture of the oxides of titanium, iron and at least one of cobalt and chromium and a second layer on the first layer, the second layer comprises an oxide of titanium.
The pearlescent pigment of claim 6, in which said first layer contains about 20 to 90% titanium dioxide and about 5 to 40% iron oxide.
The pearlescent pigment of claim 7, in which said first layer contains about 40 to 60% titanium dioxide and about 20 to 30% iron oxide.
The pearlescent pigment of claim 8, in which said first layer is about 10 to 20% of the thickness of the two layers.
Dependencies are inferred from the claim text.