Patent ID: 7211116

Claim:
A hair bleach composition to be used after mixing a first component part containing an alkali agent and a second component part containing an oxidizing agent, which comprises, after mixing, the following components (a) to (c): (a) a nitrogenous compound represented by the following formula (1) or (2), or salt thereof: (wherein, one or two of As each represents CH 2 which may be substituted by one or two selected from O, S and NH, R 1 represents a hydrogen atom; an alkyl, cycloalkyl or alkenyl group which has 12 or less carbon atoms and may be substituted by at least one group selected from a hydroxy group, an amino group which may be substituted by at least one alkyl group, an amide group which may be substituted by at least one alkyl group, a C 1-6 (poly)alkoxy or benzyloxy group which may be substituted by a hydroxy group or an amino group, a thioether group and an ester group; an alkyl halide group; or a benzyl, pyridylmethyl or phenyl group which may be substituted by at least one halogen atom; R 2 and R 3 each represents a hydrogen atom; an alkyl, alkenyl or cycloalkyl group which has 12 or less carbon atoms and may substituted by at least one group selected from hydroxy group, amino group which may be substituted by at least one alkyl group and C 1-6 alkoxy group; an acyl group having 12 or less carbon atoms; an alkylsulfonyl group having 12 or less carbon atoms; or a phenylsulfonyl group which may be substituted by at least one alkyl group; or R 2 and R 3 may form a 4- to 7-membered ring cyclic amino group together with a nitrogen atom adjacent thereto, R 4 , R 5 and R 6 each represents a hydrogen atom; a hydroxy group; an amino group; an alkyl ether group; or an alkyl or alkenyl group which has 12 or less carbon atoms and may be substituted by at least one group selected from a hydroxy group, and an amino group which may be substituted by at least one alkyl group, m stands for an integer of from 2 to 5, n stands for an integer of from 1 to 4 and p stands for an integer of from 2 to 6, (b) an oxidizing agent; and (c) an alkali agent; and has, after mixing, a pH of from 7.5 to 12.