Patent ID: 6451069
Filing Date: 2002-09-17
Classification: A61K,A61Q

Abstract:
A method for dyeing hair comprising applying to the hair a dye composition an oxidzing agent and direct dye compound having the formula (I). following formula (2), (3), (4) or (5): wherein A represents a phenylene group which may have an unionizable substituent, or a naphthylene group; R3 and R4 are the same or different and each independently represents a hydrogen atomm, a C1-4alkyl group which may have a substituent, an aralkyl group or a phenyl group, X1 represents an oxygen atom, an imino group or a methylene group, X2 represents an ethylene or trimethylene group which may have a substituent, Y represents a C1-4alkyl or an arakyl group, R6 represents a hydrogen atom or a C1-4alkyl group and R7 represents a hydrogen atom or an unionizable group; R1 and R2 are the same or different and each independently represents a C1-4alkyl group a carbamoylethyl group, a 2-carbamoylpropyl group, a benzyl group or a group of formula (6) or (7): wherein, X3 represents a hydroxyl group, an amino group or a thiol group, R8 represents a hydrogen atom, a halogen atom, a C1-4alkyl group which may have a substituent, a C1-4alkoxy group or a phenoxy group, and R9 represents a hydrogen atom or a phenyl group which may have a substituent; and Xâˆ’ represents an anion.