BASF patents color effect materials

March 19, 2012

U.S. 8,083,846 B2
BASF Corporation has received a patent for a color effect material comprised of a platelet-shaped 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 thereof; and a second spacer layer which does not provide significant incident angle dependent variable pathlength difference, the spacer layer is selected from the group consisting of chromium oxide, zinc oxide, zinc hydroxide, zirconium oxide, zirconium hydroxide, zirconium nitride, titanium nitride, iron hydroxide, polymethyl methacrylate, polyethylene terephthalate, and high density polyethylene.

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