Hair-conditioning agent and method for oxidative hair dyeing with improved brightening performance

US10293191B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Sylvia Kerl · Hamburg, DE
• Susanne Bietz · Elmshorn, DE
• Thomas Hippe · Appen, DE
• Hartmut Manneck · Klein Wesenberg, DE

Key dates

• Filing date: Jul 20, 2017
• Grant date: May 21, 2019
• Expiry date: Jul 31, 2037

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/882
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Coloring agents for keratin fibers and methods for the oxidative dyeing of keratin fibers are provided herein. In an embodiment, a coloring agent for keratin fibers includes, based on its weight, a) at least one compound selected from the group of oxidation dye precursors, direct dyes, or mixtures thereof, b) at least one dicarboxylic acid having 2 to 10 carbon atoms and/or at least one salt of this/these acid(s) in a total quantity of from about 0.1 to about 5% by weight, calculated respectively on the undissociated dicarboxylic acid and based on the weight of the coloring agent, c) at least one keratin hydrolyzate having an average molecular weight Mw in the range from about 2000 to about 7000 daltons, d) from about 20 to about 95% by weight of water and e) from zero to less than about 0.1% by weight of peroxide compound(s).