Production of polyelectrolyte capsules by surface precipitation

US7056554B2 · kind B2 · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Andreas Voigt · Regensburg, DE
• Gleb Sukhorukov · Loughton, GB
• Igor Radtchenko · Yaroslavl, RU
• Alexei Antipov · Kashkhatau, RU
• Edwin Donath · Sanitz, DE
• Helmuth Möhwald · Bingen, DE

Key dates

• Filing date: Aug 1, 2001
• Grant date: Jun 6, 2006
• Expiry date: Jan 28, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2984
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention concerns a method for producing nanocapsules and microcapsules comprising a polyelectrolyte shell by surface precipitation from the solution, by applying a shell to template particles comprising the steps (a) providing a dispersion of template particles of suitable size in a salt-containing liquid phase which contains the components required to form the shell in a dissolved form and (b) precipitating the components from the liquid phase onto the template particles under conditions which enable the formation of a shell around the template particles that has a thickness of from 1 to 100 nm.