Patent Picks—Radiation-Diffraction Colorants, Fluorescent Pigments and More

By: Rachel L. Grabenhofer

Posted: March 14, 2012

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Titanium dioxide particles coated via an atomic layer deposition process
US Patent 8133531
Publication date: March 13, 2012
Assignee: The Regents of the University of Colorado

This invention relates to titanium dioxide particles coated first with an interstitial coating and then with silicon dioxide or alumina. The coatings are suitably applied via an atomic layer deposition process. The interstitial coating preserves the bright white coloration of the particles after they are coated. The particles therefore can be used as pigments and white fillers in polymers, paints, paper and other applications.

Fluorescent cosmetic composition
US Patent 8133508
Publication date: March 13, 2012
Assignee: L'Oréal Paris

According to this patent, fluorescent pigments or colorants are important to the cosmetics industry. They can produce brilliant, very lively colors that cannot be produced with conventional coloring substances. When they do not absorb in the visible region, they can also lighten and significantly enhance the reflectance of substrates onto which they are deposited, such as the skin and hair. The present invention relates to a cosmetic composition containing fluorescent particles comprising molecules of at least one fluorescent organic compound trapped inside a matrix at least partially formed by at least one metal oxide, with said composition comprising less than 100 mg/l of said fluorescent organic compound or compounds dissolved in a liquid phase of the medium. The composition may be applied to keratinous substances, for example the skin, hair, lips, nails or eyelashes.

Cosmetic nanocomposites based on in-situ cross-linked POSS materials for long wear
US Patent 8133478
Publication date: March 13, 2012
Assignee: Avon Products Inc.