Lustrous black interference pigments
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United States of America Patent
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Dec 4, 2007
Grant Date -
Apr 6, 2006
app pub date -
Oct 1, 2004
filing date -
Oct 1, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention relates to lustrous black interference pigments based on a substrate mixture, characterised in that it has (A) a coating of Fe.sub.3O.sub.4 (B) a colorless coating consisting of one or more layers each having a refractive index of n.ltoreq.1.8, (C) optionally a coating with an absorbent, high-refractive-index material which only covers part of the surface, and optionally (D) an outer protective layer, and to the use thereof in paints, coatings, powder coatings, printing inks, plastics, ceramic materials, glasses, for the laser marking of papers and plastics, in cosmetic formulations and for the preparation of pigment compositions and dry preparations.
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