Particles comprising an anion-binding layer containing anion-forming organic active compounds, and method of making and using thereof

US7914893B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Carsten Handrosch · Heilbad Heiligenstadt, DE
• Thomas Rudolph · Darmstadt, DE
• Herwig Buchholz · Frankfurt am Main, DE
• Soheila Anzali · Groß-Zimmern, DE

Key dates

• Filing date: May 24, 2007
• Grant date: Mar 29, 2011
• Expiry date: Jan 7, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/298
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Disclosed are particles containing substrates and an anion-binding layer, containing one or more anion-forming organic active compounds or active compound/colorant mixtures; processes for preparing said particles and to methods of use thereof in cosmetics, pharmaceuticals, formulations, paints, coatings, plastics, films, in security printing, in security features in documents or identity papers, for coloring seed, for coloring foods or in medicament coatings and for the preparation of pigment compositions and dry preparations.