申请人:Merck Patent Gesellschaft mit beschrankter Haftung
公开号:US04386007A1
公开(公告)日:1983-05-31
Liquid crystalline naphthalene derivatives of the formula ##STR1## wherein ring A is 1,4-phenylene, trans-1,4-cyclohexylene or 1,4-cyclohex-1-enylene and ring system BC is 2,6-naphthylene, 3,4-dihydro-2,6-naphthylene or 1,2,3,4-tetrahydro-2,6-naphthylene, with the proviso that A is not 1,4-phenylene when BC is 2,6-naphthylene; and R.sub.1 and R.sub.2, which are identical or different, are each alkyl of up to 8 C atoms or, when the rings to which they are bonded are aromatic, also can be alkoxy, alkanoyloxy or alkoxycarbonyloxy having up to 8 C atoms in each case; or one of R.sub.1 and R.sub.2 also can be CN, halogen, CF.sub.3 or NO.sub.2 are valuable components for liquid crystalline dielectrics.
公式为 ##STR1## 的液晶
萘衍
生物,其中环A为1,4-苯基、反-1,4-环己基或1,4-
环己-1-烯基,环系统BC为2,6-
萘基、3,4-二氢-2,6-
萘基或1,2,3,4-四氢-2,6-
萘基,但当BC为2,6-
萘基时,A不是1,4-苯基;R.sub.1和R.sub.2相同或不同,均为碳数不超过8的烷基,或当它们连接的环为芳香族时,也可以是烷氧基、烷酰氧基或烷氧羰基氧基,每种情况下均具有不超过8个碳原子;或R.sub.1和R.sub.2中的一个也可以是CN、卤素、CF.sub.3或NO.sub.2,是液晶介质的有价值组分。