Sunscreen composite particles

Details Sunscreen composite particles Sunscreen composite particles

2011-02-22

2011-02-22

Padmanabhan, Sreeni (Department: 1627)

Drug, bio-affecting and body treating compositions

Topical sun or radiation screening, or tanning preparations

C424S063000, C424S401000, C424S070130

Reexamination Certificate

active

07892524

ABSTRACT:
Composite particles for providing UV photo protection in cosmetic compositions are reported which include an organic sunscreen agent dispersed within a condensation polymerized resin having carboxylic acid groups and a dielectric constant ranging from 6.5 to 18.

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Krishnan et al. (Fluorescence of Sunscreens Adsorbed to Dielectric Nanospheres: Parallels to Optical Behavior on HaCat Cells and Skin, Photochemistry and Photobiology, 2006,82: 1557-1565.
Co-Pending Application: Polonka et al.; Entitled: Sunscreen Composite Particles In Cosmetic Compositions.
Co-Pending Application: Polonka et al.; Entitled: Sunscreen Composite Particles Dispersed In Water-In-Oil Cosmetic Compositions.
Co-Pending Application: Polonka et al.; Entitled: Sunscreen Composite Particles And Porous Particles In Cosmetic Compositions.
PCT International Search Report PCT/EP2009/057150; International Filing Date Jun. 10, 2009.

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