Use of sunscreen combinations which comprise, as essential constituent, 2-(4-alkoxyanilinomethylene) malonic dialkyl esters as photostable UV filters in cosmetic and pharmaceutical preparations

US6488915B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Thomas Heidenfelder · Münstermaifeld, DE
• Kristin Tiefensee · Bad Dürkheim, DE
• Thomas Wunsch · Speyer, DE

Key dates

• Filing date: Mar 12, 2002
• Grant date: Dec 3, 2002
• Expiry date: Mar 12, 2022

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61P17/00
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Use of sunscreen combinations which comprise, as essential constituent, 2-(4-alkoxyanilinomethylene)malonic dialkyl esters as photostable UV filters in cosmetic and pharmaceutical preparationsA) compound absorbing essentially in the UV-A region andB) further compounds absorbing in the UV-A region, in the UV-B region and over both regions, where the constituent absorbing in the UV-A region consists ofA) effective amounts of at least one of the compounds of the formula I  in which the substituents R1 to R3, independently of one another, are C1-C8-alkylas photostable UV filters in cosmetic and pharmaceutical preparations for protecting human skin and human hair against solar rays.