| 摘要 |
The material contains as colour former at least one compound of the formula <IMAGE> where R1 is hydrogen, hydroxyl, C1-C6-alkoxy, C2-C6-alkenyloxy, cyclohexyloxy, cyclopentyloxy, unsubstituted or C1-C4-alkyl-, C1-C4-alkoxy- or halogen-substituted benzyloxy, phenylethyloxy, phenyloxy, naphthyloxy, phenylthio or naphthylthio, C1-C6-alkylthio, R2 and R3 are each independently of the other hydrogen, unsubstituted or C1-C4-alkoxy-, C1-C4-alkylcarbonyloxy-, hydroxyl-, halogen- or cyano-substituted C1-C6-alkyl, unsubstituted or C1-C4-alkyl-, C1-C4-alkoxy- or halogen-substituted benzyl, phenylethyl, phenyl or naphthyl, cyclopentyl or cyclohexyl, or R2 and R3 together with the nitrogen atom are a pyrrolidine, pyrazoline, piperidine or morpholine ring, or R2 together with the nitrogen atom and the ring B is an indoline or tetrahydroquinoline ring, which ring may also be substituted by methyl or phenyl, R4 is C1-C4-alkyl or phenyl, R5 is hydrogen, unsubstituted or cyano-, chlorine- or hydroxyl-substituted C1-C22-alkyl, C2-C4-alkenyl, cyclohexyl, unsubstituted or methyl-, ethyl-, methoxy-, ethoxy- or chlorine-substituted phenyl or benzyl, R6, R7 and R8 are each independently of the others hydrogen, methyl, ethyl, methoxy, ethoxy or chlorine. |
