A liquid crystal composition and a liquid crystal display element which contains it
申请人:SHIN-ETSU CHEMICAL CO., LTD.
公开号:EP0718387A1
公开(公告)日:1996-06-26
A liquid crystal composition which contains one or more types of compounds chosen from among a group of compounds represented by the following general formulas (I) through (V) :
wherein R denotes an alkyl group with 1-7 carbons, an alkoxyalkyl group with 2-7 carbons, a mono- or di-fluoroalkyl group with 2-7 carbons or an alkenyl group with 2-7 carbons; m denotes 0 or 1;
and
independently denote a trans-1-sila-1,4-cyclohexylene group, a trans-4-sila-1,4-cyclohexylene group or a trans-1,4-cyclohexylene group; X denotes H, F, Cl, 0CHF2, 0CF3, CF3, 0CkH2K+1 (k denotes an integer of (1-5), CkH2K+1, (0)sCpHqFr (p denotes 2, 3 or 4, and q and r are integers which satisfy the equation q + r = 2p + 1, and s denotes 0 or 1), (0 )sCY=CX1X2 (X1 and Y denote H, F or Cl, and X2 denotes F or Cl) or an alkoxy or alkyl group with 5 or less carbons; Y1, Y2, Y3 and Y4 independently denote H or F; and at least one of the compounds contains a trans-1-sila-1,4-cyclohexylene group or a trans -4-sila-1,4-cyclohexylene group.
一种液晶组合物,它含有从以下通式(I)至(V)所代表的一组化合物中选出的一种或多种类型的化合物:
其中 R 表示含 1-7 个碳原子的烷基、含 2-7 个碳原子的烷氧基、含 2-7 个碳原子的一氟或二氟烷基或含 2-7 个碳原子的烯基;m 表示 0 或 1;
和
分别表示反式-1-硅杂-1,4-环己烯基团、反式-4-硅杂-1,4-环己烯基团或反式-1,4-环己烯基团;X 表示 H、F、Cl、0CHF2、0CF3、CF3、0CkH2K+1(k 表示 1-5 的整数)、CkH2K+1、(0)sCpHqFr(p 表示 2、3 或 4,q 和 r 是满足公式 q + r = 2p + 1 的整数、s 表示 0 或 1),(0 )sCY=CX1X2 (X1 和 Y 表示 H、F 或 Cl,X2 表示 F 或 Cl)或碳原子数不超过 5 个的烷氧基或烷基;Y1、Y2、Y3 和 Y4 独立地表示 H 或 F;且至少有一种化合物含有反式-1-硅杂-1,4-环己烯基团或反式-4-硅杂-1,4-环己烯基团。