Patent ID: 6569409
Filing Date: 2003-05-27
Classification: A61K,A61Q

Abstract:
A process for the stabilization of at least one dibenzoylmethane derivative with respect to ultraviolet radiation in a vehicle comprising at least one oily phase, comprising combining said dibenzoylmethane derivative with an effective amount of at least one thickening copolymer comprising at least one hydrophobic unit, in an amount sufficient to result in its partial or complete solubility in said oily phase, and at least one hydrophilic unit, in an amount sufficient to produce thickening of said oily phase; said hydrophilic unit being selected from the group consisting of &agr;,&bgr;-ethylenically unsaturated C3-C6 monocarboxylic acids, &agr;,&bgr;-ethylenically unsaturated C4-C6 dicarboxylic acids, and the monoester or monoamide derivatives of said diacids, wherein said oily phase does not comprise isopropyl myristate and/or mineral oil when the thickening copolymer is a stearyl acrylate/methacrylic acid (92.5/7.5% by weight) copolymer.