Bleaching and coloring composition for keratin fibers comprising direct dyes

US12233141B2 · kind B2 · utility

Assignee

• KAO CORPORATION · JP

Inventors

• Anja Aechtner · Darmstadt, DE
• Jonathan Wood · Sudbury, US
• Marine Delbe · Darmstadt, DE

Key dates

• Filing date: Sep 20, 2021
• Grant date: Feb 25, 2025
• Expiry date: Sep 20, 2041

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/48
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A bleaching and coloring composition for keratin fibers, including one or more alkalizing agents, one or more bleaching compounds, HC Blue 18 and/or a salt thereof, and tetrabromophenol blue and/or a salt thereof. A method for bleaching and coloring of keratin fibers, including mixing the bleaching and coloring composition with a second aqueous composition including hydrogen peroxide as one or more oxidizing agents and having a pH in the range of 1 to 6 to yield a ready-to-use composition having a pH in the range of 7 to 12, applying the ready-to-use composition onto the keratin fibers and leaving it for a time period of 1 to 60 min, and optionally heating the keratin fibers to a temperature in the range of 30° C. to 60° C., and rinsing-off the keratin fibers and optionally drying the keratin fibers.