US patent issued to Sun Chemical for multicolored lustrous pearlescent pigments

Andrew Rogers

ALEXANDRIA, Virginia , January 15, 2013 (U.S. Fed News) – United States Patent no. 8,349,067, issued on Jan. 8, was assigned to Sun Chemical Corp. (Parsippany, N.J.).

"Multi-Colored Lustrous Pearlescent Pigments" was invented by Aaron M. Hollman (Union, Ky.), Stephane Nicolas (Fleurines, France), Philippe Schottland (West Chester, Ohio), Marguerite Debacker (Court Saint Etienne, Belgium), Aurelie Antonowicz (Gambloux, Belgium) and Hai Hui Lin (Mason, Ohio).

According to the abstract released by the U.S. Patent & Trademark Office: "A pearlescent pigment, wherein the pigment is an inorganic material and the color of a homogeneous coating of the pigment, measured over a white background, is selected from the group consisting of: a CIELAB L* value of about 30 or less and a chroma value of about 3 or less; a CIELAB hue angle, hab, from about 50 to about 80 degrees, wherein L* is not more than about 85, and the chroma value is greater than 22; a CIELAB hue angle, hab, from about 80 to about 275 degrees, wherein L* is not more than about 80, and the chroma value is greater than about 10; and a CIELAB hue angle, hab, from not less than about 275 to not more than about 50 degrees, wherein L* is not more than about 85, and the chroma value is greater than about 9. The pigments may be used in a variety of applications including cosmetics, plastics, automotive, or architectural coatings."

The patent was filed on Oct. 31, 2007, under Application No. 11/931,534.

For further information please visit: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&co1=AND&d=PTXT&s1=8349067&OS=8349067&RS=8349067

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