| 摘要 |
<p>Azopigments of the formula wherein X and Y are each hydrogen, halogen, alkyl or alkoxy having 1-4 C atoms, Q is a group of the formula -CONH- or-NHCO-, and Z is an O atom or is a group of the formula-NR-, -NHCO-, -CONH-, -CH=N- or in which R is hydrogen. alkyl having 1-4 C atoms, or phenyl unsubstituted or substituted by halogen, alkyl or alkoxy having 1-4 C atoms, and V is hydrogen, halogen, alkyl or alkoxy having 1-4 C atoms, and the azo group can be bound to the phenyl group A or B are useful for coloring plastics in fast yellow shades.</p> |
