申请人:Idemitsu Kosan Co., Ltd.
公开号:US04818807A1
公开(公告)日:1989-04-04
A liquid-crystalline polymer comprising repeating units of the following general formula ##STR1## wherein: R.sup.1 is --H, --CH.sub.3 or --C.sub.2 H.sub.5, 1 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 R.sup.2 is ##STR2## wherein Y is --COO-- or --OCO--, and R.sup.3 is --COOR.sup.4, --OCOR.sup.4, --OR.sup.4, --COR.sup.4 or --R.sup.4 where R.sup.4 is ##STR3## R.sup.5 being --CH.sub.3, --CN or a halogen radical, n and p being independently an integer having a value of 0 to 10 with the proviso that if R.sup.5 is --CH.sub.3, 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,包括以下通式的重复单元:##STR1##
其中:R.sup.1是--H,--CH.sub.3或--C.sub.2 H.sub.5,1是一个整数,其值为1到20,k是一个整数,其值为1到30,A是--O--(氧)或--COO--,m是0或1,R.sup.2是##STR2##
其中,Y是--COO--或--OCO--,R.sup.3是--COOR.sup.4,--OCOR.sup.4,--OR.sup.4,--COR.sup.4或--R.sup.4,其中R.sup.4是##STR3##
其中,R.sup.5是--CH.sub.3,--CN或卤素基团,n和p分别是独立的整数,其值为0到10,但如果R.sup.5是--CH.sub.3,则p不为0,X是卤素基团,q为0或1,C*是不对称碳原子。该液晶聚合物不仅具有液晶性质,并在包括室温附近的广泛温度范围内转换为铁电手性液晶C相,而且对外部因素的响应速度很高,能够显示动画,可优点地用作大尺寸屏幕和曲面屏幕的显示元件。