Process for preparing fine emulsions

US6586479B2 · kind B2 · utility

Assignee

• Clariant Corporation · DE

Inventors

• Dennis Miller · Kelkheim, DE
• Torsten Henning · Bad Soden, DE
• Wiebke Johannpeter · Steinbach, DE
• Eva-Maria Wiener · Hofheim, DE

Key dates

• Filing date: Jul 20, 2001
• Grant date: Jul 1, 2003
• Expiry date: Jul 25, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S516/925
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to fine emulsions comprising at least one W/O emulsifier and at least one hydrophilic component, and to a process for their preparation. The fine emulsions are obtainable by converting a W/O preemulsion comprising at least one W/O emulsifier into an O/W fine emulsion by adding at least one hydrophilic component and, where appropriate, changing the temperature. Suitable W/O emulsifiers are preferably sorbitol esters. The fine emulsions are preferably spray emulsions for cosmetic and pharmaceutical applications.