| 摘要 |
<p>Azo dyes (I) (where n = 1 or 2, A = 1-4C alkyl or aryl grp. such as phenyl, tolyl, naphthyl or halophenyl, R1 = H, halogen, 1-4C alkoxy or 1-4c alkyl, b = R2 = H, 1-4C alkyl or 1-4C alkoxy, R3 = H, 1-4C alkoxy or 1-4C alkyl, R4 = H, 1-4C alkoxy, 1-4C alkyl, -Br, -F, or -Cl, R5 = H, 1-4C alkoxy or 1-4C alkyl and R6 = CH3 or CH2CH3). are water soluble giving yellow, orange or scarlet shades, useful for dyeing natural or synthetic polyamides such as nylons, wool and silk, from neutral, weakly acid or weakly basic soln. Colours have good resistance to light, washing and colour change.</p> |
