Water-in-oil emulsion, composition comprising such an emulsion, and use thereof

US6426079B1 · kind B1 · utility

Assignee

• L'Oreal · FR

Inventors

• Isabelle Bara · Paris, FR
• Patricia Lemann · Châtillon, FR
• Florence Tournilhac · Paris, FR
• Annick Collette · Choisy-le-Roi, FR
• Jean-Christophe Simon · Paris, FR

Key dates

• Filing date: Mar 26, 1999
• Grant date: Jul 30, 2002
• Expiry date: Mar 26, 2019

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61Q19/00
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The present invention relates to a stable water-in-oil emulsion for cosmetic, pharmaceutical or hygiene use, comprising an aqueous phase and a fatty phase comprising a silicone oil, characterized in that it comprises an emulsifying system comprising at least one &agr;,&ohgr;-substituted oxyalkylenated silicone of formula (I): in which: R=—(CH2)pO—(C2H4O)x(C3H6O)yR1 where:R1 represents H, CH3 or CH2CH3,p is an integer ranging from 1 to 5, x ranges from 1 to 100 and y ranges from 1 to 50,it being possible for the units (C2H4O) and (C3H6O) to be distributed randomly or in blocks,the R2 radicals represent a C1-C3 alkyl radical or a phenyl radical,5≦m≦300, and a co-surfactant chosen from the family of glycol mono- and/or diesters and glyceryl mono-, di- and/or triesters, and mixtures thereof. The invention also relates to a composition comprising the above emulsion, and to its applications in the cosmetics, pharmaceutical, dermatological or hygiene fields.