Process for microencapsulation using oil-soluble emulsifiers

US5650102A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Hagedorn · Troisdorf, DE
• Peter-Roger Nyssen · Dormagen, DE
• Jurgen Weisser · Dormagen, DE

Key dates

• Filing date: Oct 6, 1995
• Grant date: Jul 22, 1997
• Expiry date: Oct 6, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J13/16
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In the process for the preparation of microcapsule dispersions by an interface polyaddition process in which an oil-in-water emulsion is prepared from an oily phase, which comprises the substance to be encapsulated and a lipophilic substance capable of polyaddition, and on aqueous phase, and the reaction partner required for the polyaddition is then added to the aqueous phase, capsules with smaller particle sizes are obtained, with a saving in emulsifying energy, if an oil-soluble emulsifier is added to the oily phase before the emulsification.