Organic compounds -- part of the class 532-570 series – Organic compounds – Silicon containing
Reexamination Certificate
2011-06-21
2011-06-21
Choi, Ling-Siu (Department: 1761)
Organic compounds -- part of the class 532-570 series
Organic compounds
Silicon containing
C424S059000, C424S060000, C424S070130, C424S070140
Reexamination Certificate
active
07964747
ABSTRACT:
The present invention relates to a polysilsesquioxane spherical particle containing a ultraviolet light (UV) absorbing group, and manufacturing method thereof, characterized in that a preferred embodiment of the present invention comprises (i) preparing a silsesquioxane precursor containing the UV-absorbing group; and (ii) reacting the silsesquioxane precursor prepared in the step (i) with aminoalkylalkoxy silane compound or its oligomer under a solvent by means of a catalyst or a catalyst and co-polymerization precursor to prepare a polysilsesquioxane spherical particle containing a UV-absorbing group. The present invention provides the polysilsesquioxane spherical particle having a good physical property and a good UV-absorbing efficiency as cosmetic additive, and a simple and economical method of manufacturing the spherical particle.
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J. Naciri, J. Y. Fang, M. Moore, D. Shenoy, C. S. Dulcey, and R. Shashidhar, Photosensitive Triethoxysilane Derivatives for Alignment of Liquid Crystals, Chem. Mater. 2000, 12, 3288-3295. © 2000 American Chemical Society.
Kim Mi-Jin
Kim Young-Baek
Leem Mi-Sun
Yoon Kyung-Sup
Ahvazi Bijan
Choi Ling-Siu
Greer Burns & Crain Ltd.
Saimdang Cosmetics, Co., Ltd.
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