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

摘要

PROBLEM TO BE SOLVED: To provide a dichroic dye for an anisotropic film hard to decompose, excellent in color tone and solubility in a solvent, and having high stability, a composition for an anisotropic dye film using the dye and a dye film.

SOLUTION: The dichroic azo dye for an anisotropic dye film is represented by formula (1) in the form of free acid. The dye composition for an anisotropic dye film comprises the dichroic azo dye and a solvent. The anisotropic dye film is formed on a substrate by a wet film production process using the dye composition for an anisotropic dye film. In the formula, A1, B1and C1each independently represent a divalent aromatic hydrocarbon group which may have a substituent; X1and Y1each independently represent an arbitrary substituent other than halogen; Ar1represents H or an arbitrary substituent; D1represents amino which may have a substituent or hydroxyl; Z1represents H, amino which may have a substituent or hydroxyl; and m1represents an integer of 1-3.

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