Aminophenol derivatives and their use in oxidative hair dyes

US6635241B1 · kind B1 · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• David Rose · Hilden, DE
• Horst Hoeffkes · Goldkronach, DE
• Bernd Meinigke · Leverkusen, DE

Key dates

• Filing date: Jan 22, 1999
• Grant date: Oct 21, 2003
• Expiry date: Jan 22, 2019

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06P3/08
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A method of coloring keratinous fibers comprising contacting the fiber with and effective amount of a primary intermediate general formula (I) or water-soluble salts thereof in which one of the two groups R1 and R2 is hydrogen and the other is hydrogen, chlorine or fluorine; one of the two groups R3 and R4 is hydrogen, a C1-4-alkoxy group, a C1-4-alkyl group, a C1-4-hydroxyalkyl group, preferably with a terminal hydroxy group or halogen and the other is one of the groups: —O—CH2—CH═CH2, —CH═CH—COOX in which X is hydrogen or a physiologically tolerable inorganic or organic cation and, in the case when the group concerned is R3, the group (a) and, in the case when the group concerned is R4, (b), in which —A— in each case is one of the groups —(CH2)x— in which x=1 to 4, —O—(CH2)y—O— in which y=1 to 4, —O—(CnH2n—z(OH)z)—O— in which n=1 to 10 and z=1 or, when n is greater than or equal to 3, z=2, —O—(C2H4—O)u— in which u=1 to 4 and —O—(C3H6—O)v— in which v is 1 to 4 and oxidizing the primary intermediate to color the fiber.…