Finely divided, highly pure neutral zinc oxide powder, a process for its preparation and its use

US5527519A · kind A · utility

Assignees

• BAYER HEALTHCARE LLC · DE
• Haarmann & Reimer Corporation · DE

Inventors

• Michael Miksits · Duisburg, DE
• Christoph Tiburtius · Neunburg vorm Wald, DE
• Jurgen Kischkewitz · Ratingen, DE
• Kai Butje · Duisburg, DE
• Albrecht Warth · Mülheim, DE
• Franz Herzig · Krefeld, DE
• Roland Langner · Holzminden, DE

Key dates

• Filing date: Dec 7, 1993
• Grant date: Jun 18, 1996
• Expiry date: Dec 7, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/12
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to finely divided, highly pure neutral zinc oxide powder used for UV protection in cosmetic sun screen preparations and daytime skin care preparations as well as in lacquers and plastics, and to a process for its preparation.