申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0307866A2
公开(公告)日:1989-03-22
Dichroic coloring agents which have a blue to blue-violet hue and have not been used to date for liquid crystal displays are disclosed. These coloring agents are represented by the following formula:
wherein X is S or NH; R₁ is a hydrogen atom, halogen atom, alkyl group or alkoxy group; and R₂ is a hydrogen atom, alkyl group, aryl group or aralkyl group.
本发明公开了具有蓝色至蓝紫色调的二色性着色剂,这种着色剂至今尚未用于液晶显示器。这些着色剂由下式表示:
其中 X 是 S 或 NH;R₁ 是氢原子、卤素原子、烷基或烷氧基;R₂ 是氢原子、烷基、芳基或芳烷基。