申请人:CHISSO CORPORATION
公开号:EP1170352A2
公开(公告)日:2002-01-09
Provided are a liquid crystalline compound having a wide liquid crystal phase temperature range, low viscosity, a large elastic constant ratio K33/K11 and excellent solubility at low temperature, a liquid crystal composition using the same and a liquid crystal display. Provided is a novel difluorovinyl compound is represented by Formula (1) :
wherein Y1 represents H or a straight chain or branched alkyl group having 1 to 10 carbon atoms, and optional -CH2- in the above alkyl group may be replaced by -O-or -CH=CH-, but -O- is not adjacent to each other, and at least one H in Y1 may be substituted with halogen or a cyano group; A1, A2, A3 and A4 each independently represent 1,4-cyclohexenylene in which optional -CH2- which is not adjacent to each other may be replaced by -O-, 1,4-phenylene in which optional H may be substituted with halogen, and a single bond, in which at least two of A1, A2, A3 and A4 have the ring structure described above, and at least one of them is 1,4-cyclohexenylene in which -CH2- is replaced by -O-; Z1, Z2 and Z3 each independently represent a single bond, -(CH2)2-, -CH=CH-, -(CH2)4-, -O(CH2)3- or -(CH2)3O-; n represents 0 or an integer of 1 to 10, provided that when any of A1, A2, A3 and A4 is 1,4-phenylene, Z1, Z2 and Z3 are single bonds, and among them, when A1 is 1,3-dioxane-2,5-diyl and A2 is 1,4-phenylene and when A3 is 1,4-cyclohexylene and A4 is a single bond, Y1 is H, and n is not 0.
本发明提供了一种
液晶相温度范围宽、粘度低、弹性常数比 K33/K11 大且低温溶解性极佳的
液晶化合物、一种使用该化合物的
液晶组合物以及一种
液晶显示器。所提供的新型二
氟乙烯基化合物由式(1)表示:
其中 Y1 代表 H 或具有 1 至 10 个
碳原子的直链或支链烷基,上述烷基中任选的-
CH2-可被-O-或-CH=CH-取代,但-O-不相邻,Y1 中至少一个 H 可被卤素或
氰基取代;A1、A2、A3 和 A4 各自独立地代表 1,4-
环己烯(其中任选的不相邻的- -可被-O-取代)、1,4-亚
苯基(其中任选的 H 可被卤素取代)和单键,其中至少两个 A1、A2、A3 和 A4 具有上述环结构,且其中至少一个是 1,4-
环己烯(其中- -被-O-取代);Z1、Z2 和 Z3 各自独立地代表单键、-( )2-、-CH=CH-、-( )4-、-O( )3- 或 -( )3O-;n 代表 0 或 1 至 10 的整数,条件是当 A1、A2、A3 和 A4 中的任一个为 1,4-亚
苯基时,Z1、Z2 和 Z3 为单键,其中,当 A1 为
1,3-二氧六环-2,5-二基且 A2 为 1,4-亚
苯基时,以及当 A3 为 1,4-
环己烯且 A4 为单键时,Y1 为 H,且 n 不为 0。