Finely dispersed emulsifier-free systems of the oil-in-water and water-in-oil type

US6620407B1 · kind B1 · utility

Assignee

• BEIERSDORF AG · DE

Inventors

• Heinrich Gers-Barlag · Kummerfeld, DE
• Anja Müller · Bad Oldesloe, DE

Key dates

• Filing date: Jan 24, 2001
• Grant date: Sep 16, 2003
• Expiry date: Jan 24, 2021

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/654
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Cosmetic or dermatological preparations, which are finely dispersed systems of the oil-in-water or water-in-oil type, comprising1. an oil phase,2. an aqueous phase,3. at least one kind of microfine polymer particles which(a) are in the form of solids in the preparation and which(b) have both hydrophilic and lipophilic properties, i.e. have an amphiphilic character, and are dispersible both in water and in oil, and4. at most 0.5% by weight of one or more emulsifiers and also optionally comprising further cosmetic or pharmaceutical auxiliaries, additives and/or active ingredients.