Patent · US Expired

Hair dye composition

US7029501B2 · kind B2 · utility

0Cited by

4References

26Claims

0Family size

Assignees

KAO CORPORATION · JP
FUJITSU LIMITED · JP

Inventors

Dominic Pratt · Darmstadt, DE
Toshio Kawagishi · Yokohama, JP

Key dates

Filing date	Sep 12, 2003
Grant date	Apr 18, 2006
Priority date	—
Expiry date	Oct 22, 2023

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K2800/43
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

Provided is a hair dye composition containing a dissociative direct dye represented by the following formula (1): wherein, R1 to R4 each represents H or substituent, X represents OH or —NHSO2R5 (R5 representing an alkyl, aryl or heterocyclic group) and A represents a group of any one of formulas (Cp-1) through (Cp-12).The hair dye composition of the present invention is capable of strongly dyeing the hair with a vivid color tone without causing decomposition of the dye during the dyeing process, exhibits excellent resistance against sunlight, hair washing, perspiration, friction and heat, has a high stability against an alkali agent and an oxidizing agent, has a high dyeing property, and shows less color fade over time.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.