Use of substituted benzazoles as UV absorbers, new benzazoles and processes for their preparation

US6037473A · kind A · utility

Assignee

• Haarmann & Reimer Corporation · DE

Inventors

• Erich Dilk · Holzminden, DE
• Roland Langner · Holzminden, DE
• William Johncock · Reinbek, DE

Key dates

• Filing date: Apr 23, 1999
• Grant date: Mar 14, 2000
• Expiry date: Apr 23, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D417/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to N-substituted benzazoles, processes for their preparation and their use as UV absorbers.