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Development of UV-screening Polysilsesquioxane Spheres  

Yoon, Kyung-Sup (R&D Center, Saimdang Cosmetics Co., Ltd.)
Lim, Mi-Sun (Department of Nano-Polymer Materials, Paichai University)
Kim, Young-Baek (Department of Nano-Polymer Materials, Paichai University)
Jung, Teak-Kyu (R&D Center, Saimdang Cosmetics Co., Ltd.)
Publication Information
Journal of the Society of Cosmetic Scientists of Korea / v.31, no.1, 2005 , pp. 65-71 More about this Journal
Abstract
A silsesquioxane precursor that contains p-methoxycinnamoyl group was synthesized to produce UV absorbing spherical polysilsesquioxane (PSQ) spheres with diameters of 10nm to a few ${\mu}m$ under different conditions. A dispersion of $10wt\%$ in Vaseline of these PSQ spheres with diameters of approximately $0.6{\mu}m$ showed SPF values of 5.7 and the identical dispersion did not turn white when applied to human hands. These UV absorbing PSQ spheres showed higher boosting effect of sun protection factor (SPF) than the well known UV blocking octyl methoxycinnamate (OMC). The results indicated that the PSQ spheres with p-methoxycinnamoyl group should be useful as the ingredients in UV screening functional cosmetics without causing allergies and whitening.
Keywords
UV absorbing; sphere; SPF; polysilsesquioxane; functional cosmetics;
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