Patent ID: 6531160
Filing Date: 2003-03-11
Classification: A61K,A61P,A61Q

Abstract:
Microcapsules with an aqueous core containing at least one water-soluble cosmetic or dermatological active principle, and an impermeable polymeric envelope, an impermeable waxy envelope, or an impermeable polymeric waxy envelope comprisingat least one polymer selected from the group consisting of polycaprolactone, poly(3-hydroxybutyrate), poly(ethylene adipate), poly(butylene adipate), cellulose esters of at least one C1-C4 carboxylic acid, copolymers of styrene and maleic anhydride, copolymers of styrene and acrylic acid, styrene-ethylene/butylene-styrene block terpolymers, styrene-ethylene/propylene-styrene block terpolymers and terpolymers of ethylene, vinyl acetate and maleic anhydride, at least one wax selected from the group consisting of beeswax, polyglycerolated beeswax, hydrogenated plant oils, paraffin with a melting point above 45Â° C., and silicone waxes, or a combination thereof.