Hair dye composition

US6451069B2 · kind B2 · utility

Assignee

• KAO CORPORATION · JP

Inventors

• Kenichi Matsunaga · Darmstadt, DE
• Hajime Miyabe · Sumida, JP
• Yukihiro Ohashi · Mooka, JP

Key dates

• Filing date: Mar 16, 2001
• Grant date: Sep 17, 2002
• Expiry date: Mar 16, 2021

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K8/496
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Provided is a hair dye composition containing a direct dye (1). This hair dye composition has markedly high hair dyeing power, has less color fade over time and undergoes a smaller change in the color tone of the dye after storage. [B1, B2: the group (2), (3), (4) or (5); R1, R2: the group (6), (7), etc.; X-: anion (A: a (substituted) phenylene group, etc., R3, R4: a (substituted) lower alkyl group, etc.; X1: O, —NH— or CH2-; X2: a (substituted) trimethylene group, etc.; Y: a (substituted) lower alkyl group, etc.; R5: a lower alkyl group, etc.; R6: a lower alkyl group, etc.; R7: H, etc.; X3: —OH, —NH2— or —SH; R8: a lower alkoxy group, etc.; and R9: a phenyl group, etc.)].