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Patents

ENGELHARD PATENTS

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

ENGELHARD PATENTS
COLOR EFFECT MATERIALS
Patent No. U.S. 6,821,333 B2
Engelhard Corp. has been granted
a patent for a color effect material
that is comprised of a plateletshaped
substrate sequentially
encapsulated with a first layer
which is highly reflective to light
directed thereon and which is selected
from the group consisting of silver,
gold, platinum, palladium,
rhodium, ruthenium, osmium, iridium
and alloys. It is also comprised
of a second spacer layer which does
not provide significant incident
angle dependent variable pathlength
difference, the spacer layer
being selected from the group consisting
of silicon dioxide, magnesium
fluoride, magnesium oxide,
magnesium hydroxide, aluminum
oxide, aluminum hydroxide, titani-
BASF Coatings patents powder clearcoat
012CWM0205.pdf um oxide, titanium hydroxide and
iron oxide

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