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US 2013/0156834 A1Published application
Process for treating sol-gel capsules
AssigneeMerck Patent GmbH
InventorsKaiman Shimizu, Yukitaka Watanabe, Yuichi Kubota, Fumiko Sasaki, Keisuke Kawagoe, Gabriele Witte, Frank Pfluecker
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Abstract
The present invention relates to a process for treating sol-gel capsules comprising a cosmetic or pharmaceutical active material with an inorganic material, as well as sol-gel capsules produced by a process according to the present invention and formulations comprising such sol-gel capsules.
Claims15
A process for treating sol-gel capsules comprising an encapsulated cosmetic or pharmaceutical active material with an inorganic material, characterized in that the treatment comprises the following steps:
- a) providing a suspension of sol-gel capsules,
- b) addition of one or more water-soluble inorganic precursor compounds,
- c) precipitation of the inorganic material onto the capsules' surfaces,
- d) optionally repeating steps b) and c) one or more times, and
- e) optionally isolating and/or drying the treated sol-gel capsules.
2 more elements
Dependencies are inferred from the claim text.