title: UV protection afforded by gel-trapped TiO2 particles.
abstract: We have developed a technology to incorporate micronized titanium dioxide (TiO(2)), together with antioxidants, in particles of a UV-visible transparent polymer gel. These particles are coated with silica to avoid clustering and the size of the micronized TiO(2) reduces the back scattering of white light. gel-trapped TiO(2) minimizes the oxidative stress exerted by UV radiation, increases the photo-stability of some accompanying ingredients, such as avobenzone. The size of the particles is in the micrometre range. This favors their permanence on the top of the stratum corneum. Gel-trapped TiO(2)-based sunscreens provide a larger SPF and two-fold larger UVA protection than equal-composition sunscreens that contain larger amounts of untrapped TiO(2).
authors: Estee Lauder Research Park, Melville, NY, USA. msojka@estee.com
authors: Milan F
authors: MF
authors: Sojka
authors: Phillip G
authors: PG
authors: Cummins
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authors: Declercq
authors: Christina G
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authors: Mirela C
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authors: Ionita-Manzatu
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authors: McKeever-Alfieri
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authors: Najdek
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authors: Pernodet
authors: Ilse M E
authors: IM
authors: Sente
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authors: Teta
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authors: Van Rillaer
authors: Daniel B
authors: DB
authors: Yarosh
authors: Paolo U
authors: PU
authors: Giacomoni