TRISAZO DYE, COMPOSITION CONTAINING THE SAME FOR ANISOTROPIC DYE FILM, ANISOTROPIC DYE FILM, AND POLARIZING ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide a dye for forming an anisotropic dye film by a wet process and anisotropic dye film using the dye, etc. which are black and have a high degree of polarization and a high degree of molecular orientation. SOLUTION: In the trisazo dye for forming an anisotropic dye film by a wet process, the dye composition for an anisotropic dye film containing the dye, the anisotropic dye film and the polarizing element using the isotropic dye film, a free acid is represented by the following general formula (1) (wherein A1is an optionally substituted phenyl or aromatic heterocyclic group, B1is an optionally substituted aromatic hydrocarbon group, D1is an optionally substituted aromatic hydrocarbon or aromatic heterocyclic group, R1is a hydrogen atom, a hydroxy group or an optionally substituted amino group, and m and n are each 0 or 1). COPYRIGHT: (C)2006,JPO&NCIPI