申请人:CHISSO CORPORATION
                            
                            
                                公开号:EP0377469A1
                            
                            
                                公开(公告)日:1990-07-11
                            
                            
A liquid crystal compound having a relatively low viscosity, a superior compatibility with other liquid crystalline compounds and suitable for preparing a liquid crystal device having a high response rate, and a superior liquid crystal composition containing the compound are provided, which compound is expressed by the formula
 wherein R¹ is H, F, Cℓ, CN or 1-20C alkyl or alkenyl in which alkenyl one -CH₂- group or two not-adjacent -CH₂- groups may be replaced by -O- and in which alkenyl the position and number of the double bond may be optionally chosen; A¹, A² and A³ are
 the H atom(s) of which
 may be replaced by F, Cℓ or methyl; B¹ and B² are -CH₂CH₂-, -CH₂O-, -OCH₂- or single bond; n is 0 or 1; and m is 0 to 20.  
                            本发明提供了一种粘度相对较低、与其他液晶化合物的兼容性较好、适用于制备具有高响应速度的液晶器件的液晶化合物,以及一种含有该化合物的优质液晶组合物,该化合物由式表示
 其中 R¹ 是 H、F、Cℓ、CN 或 1-20C 烷基或烯基,其中烯基的一个 -CH₂- 基团或两个不相邻的 -CH₂- 基团可被 -O- 取代,其中烯基的双键位置和数目可任意选择;A¹、A² 和 A³ 是
 其中的 H 原子
 B¹和 B² 为-CH₂CH₂-、-CH₂O-、-OCH₂- 或单键;n 为 0 或 1;m 为 0 至 20。