Compositions comprising solid particles encapsulated in a...

A - Human Necessities – 61 – K

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A61K 8/11 (2006.01) A61K 8/27 (2006.01) A61K 8/29 (2006.01) A61K 8/89 (2006.01) A61K 9/48 (2006.01) A61P 17/18 (2006.01) A61Q 17/04 (2006.01)

Patent

CA 2735526

The present invention relates to topical compositions containing solid particles that are stabilized via encapsulation into a cross-linked silicone matrix. The solid particles are preferably formed of a metal oxide, such as zinc oxide or titanium dioxide, and the cross-linked silicone matrix is preferably formed by cross-linking a silicone having branched reactive alkoxyl moieties in the presence of a stannous carboxylate cross-linking agent. The stabilized particles of the present invention can readily be used either alone or in combination with other skin care actives to form topical compositions with improved stability and performance.

La présente invention concerne des compositions topiques contenant des particules solides qui sont stabilisées par encapsulation dans une matrice de silicone réticulé. Les particules solides sont de préférence formées dun oxyde métallique, tel que loxyde de zinc ou loxyde de titane, et la matrice de silicone réticulé est de préférence formée par la réticulation dun silicone ayant des groupes fonctionnels alcoxyles réactifs en présence dun agent de réticulation de carboxylate stanneux. Les particules stabilisées selon la présente invention peuvent être facilement utilisées seules ou en combinaison avec dautres principes actifs de soins de la peau pour former des compositions topiques avec une stabilité et une performance améliorées

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