发明授权
- 专利标题: Tetracyclic compound having lateral halogen substituent and liquid crystal composition comprising the same
- 专利标题(中): 具有侧卤素取代基的四环化合物和包含它们的液晶组合物
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申请号: US09242921申请日: 1999-02-26
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公开(公告)号: US06174458B1公开(公告)日: 2001-01-16
- 发明人: Koji Koga , Tsugumichi Ando , Hiroyuki Takeuchi , Shuichi Matsui , Kazutoshi Miyazawa , Norihisa Hachiya , Etsuo Nakagawa
- 申请人: Koji Koga , Tsugumichi Ando , Hiroyuki Takeuchi , Shuichi Matsui , Kazutoshi Miyazawa , Norihisa Hachiya , Etsuo Nakagawa
- 优先权: JP8-245525 19960828
- 主分类号: C09K1930
- IPC分类号: C09K1930
摘要:
A tetracyclic compound expressed by the following general formula (1) wherein H1 to H12 represent hydrogen atom at least one of which is replaced by a halogen atom, when either H6 or H8 is replaced by a halogen atom, at least one of the remaining hydrogen atoms is replaced by a halogen atom; R1 and Y1 independently represent an alkyl group, alkoxy group, or alkoxyalkyl group having 1 to 20 carbon atoms, or an alkenyl group having 2 to 20 carbon atoms, one or more methylene group in R1 and Y1 may be replaced by oxygen atom, sulfur atom, dihydrosilylene group, dimethylsilylene group, —CH═CH—, or —C≡C—; and X1, X2, and X3 independently represent a covalent bond, 1,2-ethylene group, or 1,4-butylene group; and a novel liquid crystal composition comprising the tetracyclic compound and having, at the same time, a wide temperature range of a nematic phase, high optical anisotropy, and high chemical stability.
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