Dichromatic coloring matter for color liquid crystal display element

Abstract

Abstract PURPOSE:To provide a dichromatic coloring matter consisting of a specified compd. having a perylene structure in the center and azo color introduced at the terminal and having a high dichromatic ratio, a high molecular extinction coefficient, a long service life and a high solubility in liquid crystal. CONSTITUTION:The dichromatic coloring matter to be added to the liquid compsn. consists of a compd. of formula I [where A and B are of formulas II and III(n is 0 or 1; C is -N=N-, -CH=N- or formula IV); X and Y are of formula V(R1 and R2 are alkyl or H), alkyl or alkoxyl)]. The compds. of formula I are, e.g., of formulas VI and VII.

Inventors

• 👤 Mitsuru Kano
• 👤 満 鹿野
• 👤 Yoshinori Kato
• 👤 加藤　義徳
• 👤 Yoshimi Kamijo
• 👤 芳省 上條
• 👤 Yoshio Takeda
• 👤 武田　圭生
• 👤 Yoshinari Sakikubo
• 👤 崎久保　能成
• 👤 Naoki Yagi
• 👤 八木　直希

Bibliographic Details