COMPOSITION FOR ANISOTROPIC DYE FILM, ANISOTROPIC DYE FILM AND OPTICAL ELEMENT

WIPO Patent Application WO/2015/087978

A1

Provided is a composition for an anisotropic dye film, said composition being useful in forming an anisotropic dye film which exhibits a high dichroic ratio and a high transmittance over the whole visible light region. A composition which is to be used in forming an anisotropic dye film by a wet film-forming method and which contains at least two disazo dyes and a solvent, characterized in that: the disazo dyes are a disazo dye (1), the free acid form of which is represented by general formula (I), and a disazo dye (2), the free acid form of which is represented by general formula (II); a 10mass ppm aqueous solution of the disazo dye (1) exhibits a maximum absorption in a wavelength region of 550 to 640nm; a 10mass ppm aqueous solution of the disazo dye (2) exhibits a maximum absorption in a wavelength region which is 10nm to 100nm shorter than the wavelength of maximum absorption of the 10mass ppm aqueous solution of the disazo dye (1); and the concentrations of the disazo dyes (1) and (2) in the composition are 3mass% or more and 40mass% or less respectively.

SHIGA YASUSHI (JP)
NISHIMURA MASAAKI (JP)
TAKEUCHI SACHIE (JP)
OSAWA TERUTSUNE (JP)
SANO HIDEO (JP)

PCT/JP2014/082872

June 18, 2015

December 11, 2014

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MITSUBISHI CHEM CORP (JP)

G02B5/30; C09B67/20; C09B67/44; C09B31/072; H01L51/50; H05B33/02

JP2010026024A	2010-02-04
JPH01313568A	1989-12-19
JP2003215338A	2003-07-30
JP2012177122A	2012-09-13

SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)

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