申请人:Nippon Kayaku Kabushiki Kaisha
公开号:EP3127965A1
公开(公告)日:2017-02-08
The present invention relates to an azo compound that is useful as a dichroic pigment used in a polarizing plate having excellent polarizing performance and durability and having little color leakage in a visible light region, and used in a neutral gray polarizing plate for vehicle mounting that uses the aforementioned polarizing plate. More specifically, the invention relates to an azo compound that is represented by formula (1) [In the formula, R1-R4 each independently represent a hydrogen atom, a C1-5 alkyl group, a C1-5 alkoxy group, a sulfo group, or a C1-5 alkoxy group having a sulfo group, X represents an amino group having a substituent, a benzoylamino group having a substituent, a phenylamino group having a substituent, a phenylazo group having a substituent, or a naphthotriazole group having a substituent, m represents 3 or 4, n represents 1 or 2, and p represents 1, 2, or 3.], or to a salt of said compound.
本发明涉及一种偶氮化合物,该化合物可用作偏光板中的分色颜料,该偏光板具有优异的偏光性能和耐久性,并且在可见光区域几乎不漏色,还可用于使用上述偏光板的车辆安装用中性灰偏光板。更具体地说,本发明涉及一种由式(1)表示的偶氮化合物[式中,R1-R4 各自独立地代表氢原子、C1-5 烷基、C1-5 烷氧基、磺基或具有磺基的 C1-5 烷氧基、X 代表具有取代基的氨基、具有取代基的苯甲酰氨基、具有取代基的苯基氨基、 具有取代基的苯基偶氮基团或具有取代基的萘三唑基团,m 代表 3 或 4,n 代表 1 或 2,p 代表 1、2 或 3。] 或所述化合物的盐。