| 摘要 |
PURPOSE: To obtain a dyeing composition for keratin fiber to give a dyed color having high light-fastness, weather fastness and washing fastness by using a chloro-m-phenylenediamine as a coupling agent in combination with a precursor of a para-type oxidation dye. CONSTITUTION: A compound of the formula (Z and Z' are each a 1-4C alkyl or a 2-4C hydroxyalkyl; R1 and R2 are each H, a 1-4C alkyl or 2-3C mono or polyhydroxyalkyl), e.g. 3-(β-hydroxyethyl) amino-5-amino-2,4- dimethoxychlorobenzene is used as a coupling agent in combination with a precursor of a para-type oxidation dye (preferably a p-phenylenediamine compound or a p-aminophenol compound). The amount of the compound of the formula is preferably 0.05-3.5wt.% based on the total composition and the sum of the compound and the oxidation dye precursor is 0.1-7wt.%. The compounds of the formula are new except for the compound wherein both R1 and R2 are H and both Z and Z' are methyl.
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