Compositions comprising solid particles entrapped in...

Details Compositions comprising solid particles entrapped in... Compositions comprising solid particles entrapped in...

A - Human Necessities

61

K

A61K 8/19 (2006.01) A61K 8/14 (2006.01) A61K 8/72 (2006.01) A61Q 19/00 (2006.01)

Patent

CA 2706148

The present invention relates to topical compositions containing solid particles that are stabilized via entrapment by microspheres. Each of the microspheres contains a collapsed polymeric shell that has entrapped therein one or more solid particles. The solid particles are preferably formed of zinc oxide or titanium dioxide or both, which can readily be used either alone or in combination with other sunscreen agents to form sunscreen compositions of broader UV protection spectrum and enhanced photostability.

La présente invention porte sur des compositions topiques contenant des particules solides qui sont stabilisées par piégeage par des microsphères. Chacune des microsphères contient une coque polymère groupée qui a piégé dans celle-ci une ou plusieurs particules solides. Les particules solides sont de préférence formées d'oxyde de zinc ou de dioxyde de titane ou les deux, qui peuvent facilement être utilisés soit seuls, soit en combinaison avec d'autres agents écrans solaires pour former des compositions écrans solaires de spectre de protection contre les UV plus large et de photostabilité améliorée.

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