Sulphonic acids and their use as UV absorbers

US6042814A · kind A · utility

Assignee

• Haarmann & Reimer Corporation · DE

Inventors

• Oskar Koch · Oebisfelde, DE
• Roland Langner · Holzminden, DE
• Alfred Krempel · Holzminden, DE

Key dates

• Filing date: Apr 16, 1998
• Grant date: Mar 28, 2000
• Expiry date: Apr 16, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K15/30
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Sulphonic acids of formula (I) in which the components and indices have the meanings given in the description, are eminently suitable as u/v absorbers, especially in cosmetic sun-screening agents. ##STR1##