| 摘要 |
A process for the mass coloration of polyesters which comprises the use of a dye of the formula <IMAGE> (I) wherein B represents alkylene of 2 to 4 carbon atoms, Y represents cycloalkyl of 5 to 6 carbon atoms, aralkyl of 7 to 14 carbon atoms or a substituted or unsubstituted carbocyclic or heterocyclic aromatic radical, X represents cyanoalkyl of 1 to 5 carbon atoms or -B-OCO-Y, and A represents an aromatic radical of the formula <IMAGE> wherein R1 represents halogen, cyano, trifluoromethyl or alkylsulphonyl of 1 to 4 carbon atoms, and R2 represents hydrogen or halogen, or represents the group D-N=N-D'- in which D and D' represent substituted or unsubstituted phenyl or naphthyl radicals.
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