申请人:Nippon Kayaku Kabushiki Kaisha
公开号:EP3421546A1
公开(公告)日:2019-01-02
The purpose of the present invention is to provide: a high performance dye-based polarizing film and dye-based polarizing plate, in particular a neutral gray high performance dye-based film and dye-based polarizing plate, having excellent polarizing performance and moisture resistance, heat resistance and light resistance; and an azo compound or a salt thereof able to produce same. The present invention provides an azo compound represented by formula (1) or a salt thereof.
本发明的目的是提供:一种高性能染料基偏光膜和染料基偏光板,特别是一种中性灰色高性能染料基偏光膜和染料基偏光板,具有优异的偏光性能和防潮性、耐热性和耐光性;以及一种能够生产这种偏光膜和偏光板的偶氮化合物或其盐。本发明提供一种由式(1)表示的偶氮化合物或其盐。