de zeitgeist , or a salt thereof , and a polarizing film using the same.

摘要

The present invention provides compounds of formula D yarn (I). ; [ formula I] ; wherein , A represents a 4- sulfophenyl , or 6,8- sulfo -2-naphthyl , one of R ¹ and R ² is a hydrogen , and the other represents a methyl . ; this invention also provides a film base material and the base material or the dye-based polarizing di yarns compound containing a salt of the formula contained in (I). ; di yarns of the present invention provides a compound when used as a polarizing element in light resistance and initial polarizing performance , especially an excellent polarization film is in light resistance .