Patent ID: 6497888
Filing Date: 2002-12-24
Classification: A61K,A61Q

Abstract:
A process for limiting penetration into at least one of skin and keratinous fibres of at least one active agent, chosen from colorants and sunscreens, present in a base composition, chosen from cosmetic and pharmaceutical base compositions, comprising jointly applying to said at least one of skin and keratinous fibers said base composition and an effective amount of a dispersion of vesicles in a medium, said vesicles comprising at least one ceramide of formula (I): wherein R1 is chosen from saturated and unsaturated, linear and branched C1-C32 alkyl groups optionally substituted by at least one hydroxyl group, wherein said at least one hydroxyl group is optionally esterified by a group chosen from C1-C35 acyls; and R2 is chosen from saturated and unsaturated, linear and branched C1-C50 alkyl groups optionally substituted by at least one hydroxyl groups, and wherein said at least one hydroxyl group is optionally esterified by a group chosen from C1-C30 acyls.