申请人:KOBAYASHI Masahide
公开号:US20110240919A1
公开(公告)日:2011-10-06
The subject is to provide a liquid crystal that has a high stability to heat, light and so forth, a wide temperature range of a nematic phase, a small viscosity, a large optical anisotropy and a suitable elastic constant K
33
, and further has a large negative dielectric anisotropy and an excellent compatibility with any other liquid crystal compound. The invention provides the compound (1):
wherein, for example, R
1
and R
2
are hydrogen, alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, alkoxy having 1 to 9 carbons, alkoxyalkyl having 2 to 9 carbons or alkenyloxy having 2 to 9 carbons; when one of the ring A
1
, the ring A
2
and the ring A
3
is 1,4-phenylene or 2,3-difluoro-1,4-phenylene, the other two are 1,4-cyclohexylene or 1,4-cyclohexenylene; and Z
1
is a single bond, —(CH
2
)
2
—, —CH
2
O—, —OCH
2
—, —COO— or —OCO—.
该专利的目的是提供一种液晶,具有高热稳定性、光稳定性、宽的向列相温度范围、低粘度、大光学畸变和适当的弹性常数K33,而且具有大的负介电畸变和与任何其他液晶化合物的优异相容性。该发明提供了化合物(1):其中,例如,R1和R2是氢、具有1至10个碳的烷基、具有2至10个碳的烯基、具有1至9个碳的烷氧基、具有2至9个碳的烷氧基烷基或具有2至9个碳的烯氧基;当环A1、环A2和环A3中的一个是1,4-苯撑基或2,3-二氟-1,4-苯撑基时,另外两个是1,4-环己撑基或1,4-环己烯撑基;而且Z1是单键、—(CH2)2—、—CH2O—、—OCH2—、—COO—或—OCO—。