| 摘要 |
<p>New dye couplers are disclosed, which are particularly suitable for use in hair dye compositions. These couplers have the general formula: <IMAGE> in which Z represents either a polyhydroxyalkyl radical in which the alkyl group contains from 3 to 6 carbon atoms, the said radical containing 2 or 3 hydroxyl groups, or an alkyl radical containing at least one chain heteroatom and at least one hydroxyl group, the said alkyl radical containing from 4 to 8 carbon atoms, and include their acid salts.</p> |
