Dye-containing pellets for dyeing keratin fibres

US7458992B2 · kind B2 · utility

Assignee

• Wella GmbH · DE

Inventors

• Juergen Schmenger · Weiterstadt, DE
• Petra Braun · Munster, DE
• Wolfram Englisch · Rabenau, DE

Key dates

• Filing date: May 3, 2004
• Grant date: Dec 2, 2008
• Expiry date: Nov 29, 2024

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K8/0216
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The present patent application relates to dye-containing pellets obtained by (a) homogeneous mixing of a starting material containing at least one natural and/or synthetic dye with a suitable carrier material and then coating with a suitable encapsulation material or (b) coating a suitable carrier material with a mixture of at least one natural and/or synthetic dye and at least one suitable encapsulation material, to the use of said pellets for preparing colorants for keratin fibers and to the colorants based on said pellets.