基本信息:
- 专利标题： PHENYLCYCLOPEXANE COMPOUND AND LIQUID CRYSTAL MEDIUM
- 申请号：JP8216399 申请日：1999-02-18
- 公开(公告)号：JPH11315040A 公开(公告)日：1999-11-16
- 发明人： WAECHTLER ANDREAS , HITTICH REINHARD , POETSCH EIKE , PLACH HERBERT , COATES DAVID , RIEGER BERNHARD , KRAUSE JOACHIM
- 申请人： MERCK PATENT GMBH
- 专利权人： MERCK PATENT GMBH
- 当前专利权人： MERCK PATENT GMBH
- 优先权： DE3926871 1989-08-16; DE4006313 1990-03-01; DE4013084 1990-04-25; DE4013467 1990-04-27; DE4021154 1990-07-03
- 主分类号： C07C17/26
- IPC分类号： C07C17/26 ; C07C22/08 ; C07C25/13 ; C07C25/24 ; C07C25/28 ; C07C43/225 ; C07C255/50 ; C09K19/30 ; C09K19/42 ; G02F1/13
摘要：
PROBLEM TO BE SOLVED: To obtain a new phenylcyclohexane compound useful as a liquid crystal medium for liquid crystal phase, in particular nematic phase having positive dielectric anisotropy. SOLUTION: This new phenylcyclohexane compound is shown by formula I ((n) is 0-7; Q to Q are each H or CH3 ; (r) is 0-5; A is trans-1,4-cyclohexylene, 1,4-phenylene or the like; X is Cl, CF3 or the like; Y and Z are each H), e.g. 4-trans-4-(1-butenyl)cyclohexyl-1,2-difluorobenzene. The compound of formula I is obtained by converting an aldehyde compound of formula II by Wittig process using the corresponding phosphonium salt. Use of the compound of formula I affords liquid crystal phase with wide nematic range, high nematic formability even at lowered temperatures, high chemical stability, conspicuous ε⊥involving positive dielectric anisotropy, and the low temperature dependency on threshold voltage and/or low optical anisotropy.
公开/授权文献:
- JP3122426B2 公开/授权日：2001-01-09