| 摘要 |
<p>The present invention refers to a polycyclic dye of the formula (I) <CHEM> wherein each of R<1>, R<2>, R<4> and R<5>, independently, is hydrogen, alkyl or alkoxy; R<3> is hydrogen, alkyl, optionally substituted alkoxy or amino; and Y is a straight or branched chain C1-8 alkylene group, methods for its preparation and a method for colouring synthetic fibre material or fibre blend thereof using such polycyclic dye.</p> |
