Stabilization of UV-sensitive active ingredients

US7201893B2 · kind B2 · utility

Assignee

• BEIERSDORF AG · DE

Inventors

• Volker Wendel · Seeheim-Jugenheim, DE
• Anja Göppel · Hamburg, DE

Key dates

• Filing date: Feb 27, 2004
• Grant date: Apr 10, 2007
• Expiry date: Feb 16, 2025

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/52
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Cosmetic and dermatological formulations containing at least one UV-sensitive active ingredient have increased UV protection and have the active ingredient stabilized against decomposition through addition of at least one dialkyl naphthalate of the structural formulawherein R1 and R2 are selected independently of one another from the group consisting of branched and unbranched alkyl groups having between 6 and 24 carbon atoms, and at least one emulsifier, selected from the group consisting of phosphate and sulphate emulsifiers.