Agent for the oxidative dyeing of hair, containing specific combinations of developers and couplers

US9707167B2 · kind B2 · utility

Assignee

• Henkel AG & Co. KGaA · DE

Inventors

• Antje Gebert-Schwarzwaelder · Neuss, DE
• Melanie Moch · Dormagen, DE

Key dates

• Filing date: May 13, 2016
• Grant date: Jul 18, 2017
• Expiry date: May 13, 2036

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K2800/88
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

An agent for oxidatively dyeing keratinous fibers includes in a cosmetic carrier: (A) 4,5-diamino-1-(2-hydroxyethyl)-1H-pyrazole and/or one of the physiologically acceptable salts thereof as developer; (B) at least one p-aminophenol derivative from the group comprising p-aminophenol, 4-amino-3-methylphenol, and/or the physiologically acceptable salts thereof as developer; (C) at least one m-diaminobenzene derivative from the group comprising 2-(2,4-diaminophenoxy)ethanol, 1-methoxy-2-amino-4-(2′-hydroxyethylamino)benzene, 2,6-bis(2′-hydroxyethylamino)-1-methylbenzene, and/or one of the physiologically compatible salts thereof as coupler; and (D) at least one m-aminophenol derivative from the group 3-aminophenol, 5-amino-2-methylphenol and/or one of the physiologically acceptable salts thereof as coupler, wherein the molar ratio of all the developers of group (A) included in the agent to all the developers of group (B) included in the agent, i.e., the molar ratio (A)/(B), has a value of at least 1.2.