申请人:IDEMITSU KOSAN COMPANY LIMITED
公开号:EP0258898A2
公开(公告)日:1988-03-09
A liquid-crystalline polymer comprising repeating units of the following general formula
wherein:
R1 is -H, -CH3 or -C2H5,
I is an integer having a value of 1 to 20,
k is an integer having a value of 1 to 30,
A is -O-(oxygen) or -COO-,
m is 0 or 1, and R2 is
or
wherein
Y is -COO-or -OCO-. and R3 is -COOR4, -OCOR4, -OR4, -COR4 or -R4 where R4 is
R5 being -CH3, -CN or a halogen radical, n and p being independently an integer having a value of 0 to 10 with the proviso that if R5 is -CH3, p is not 0, X being a halogen radical, q being 0 or 1, and C* being an asymmetric carbon atom.
The liquid-crystalline polymer not only exhibits liquid-crystalline properties and transfers to ferroelectric chiral smectic C phase at temperatures of a wide range including the vicinity of room temperature but also has a high speed in responding to external factors enabling to display motion pictures, and can be advantageously used as display elements of large size screens and curved screens.
一种液晶聚合物,由以下通式的重复单元组成
其中
R1 是-H、-CH3 或-C2H5、
I 是数值为 1 至 20 的整数、
k 是数值为 1 至 30 的整数、
A 是-O-(氧)或-COO-、
m 是 0 或 1,R2 是
或
其中
R3 是-COOR4、-OCOR4、-OR4、-COR4 或-R4,其中 R4 是
R5为-CH3、-CN或卤素基,n和p独立地为0至10的整数,但如果R5为-CH3,则p不为0,X为卤素基,q为0或1,C*为不对称碳原子。
该液晶聚合物不仅具有液晶特性,并能在包括室温附近在内的广泛温度范围内转变为铁电手性共晶 C 相,而且还能对外界因素做出快速反应,从而能够显示动态图像,并可作为大尺寸屏幕和曲面屏幕的显示元件而发挥优势。