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Title:
NOVEL LIQUID-CRYSTAL COMPOUNDS HAVING LARGE NEGATIVE VALUE OF PERMITTIVITY ANISOTROPY, LIQUID-CRYSTAL COMPOSITION, AND LIQUID-CRYSTAL DISPLAY ELEMENT
Document Type and Number:
WIPO Patent Application WO/1999/021816
Kind Code:
A1
Abstract:
Liquid-crystal compounds combining an extremely large negative value of permittivity anisotropy with a small value of optical anisotropy; a liquid-crystal composition containing the same; and a liquid-crystal display element formed from the liquid-crystal composition. The compounds are novel liquid-crystal compounds represented by general formula (1) having a 2,3-difluorophenyl moiety and the liquid-crystal composition contains any of the novel liquid-crystal compounds, while the liquid-crystal display element is formed from this liquid-crystal composition; wherein Ra and Rb each represents linear or branched C¿1-20? alkyl in which any methylene group may have been replaced with -O-, -CH=CH-, or -C$m(Z)C-, provided that each -O- does not neighbor another -O-; ring A¿1? represents cyclohexane-1,4-diyl in which any methylene group may have been replaced with -O-; ring A¿2? represents 2,3-difluoro-1,4-phenylene in which the hydrogen atoms at the 5- and 6-positions each may have been replaced with methyl or a fluorine atom; Z¿1? and Z¿2? each represents a single bond or -CH¿2?CH¿2?-; and Xa, Xb, Xc, and Xd each represents a hydrogen, fluorine, or chlorine atom, provided that at least one of them is a fluorine or chlorine atom.

Inventors:
Miyazawa, Kazutoshi (27-7, Chiharadai 3-chome Ichihara-shi Chiba, 290-0158, JP)
Takeuchi, Hiroyuki (353-1, Saihiro Ichihara-shi Chiba, 290-0022, JP)
Kubo, Yasuhiro (17 Tatsumidai-higashi 2-chome Ichihara-shi Chiba, 290-0003, JP)
Takeshita, Fusayuki (939-5, Nakatomi Kimitsu-shi Chiba, 299-1132, JP)
Nakagawa, Etsuo (8890, Goi Ichihara-shi Chiba, 290-0056, JP)
Application Number:
PCT/JP1998/004834
Publication Date:
May 06, 1999
Filing Date:
October 26, 1998
Export Citation:
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Assignee:
CHISSO CORPORATION (6-32, Nakanoshima 3-chome Kita-ku Osaka-shi Osaka, 530-0005, JP)
Miyazawa, Kazutoshi (27-7, Chiharadai 3-chome Ichihara-shi Chiba, 290-0158, JP)
Takeuchi, Hiroyuki (353-1, Saihiro Ichihara-shi Chiba, 290-0022, JP)
Kubo, Yasuhiro (17 Tatsumidai-higashi 2-chome Ichihara-shi Chiba, 290-0003, JP)
Takeshita, Fusayuki (939-5, Nakatomi Kimitsu-shi Chiba, 299-1132, JP)
Nakagawa, Etsuo (8890, Goi Ichihara-shi Chiba, 290-0056, JP)
International Classes:
C07C25/18; C07C43/225; C07D239/26; C07D309/06; C07D319/06; C09K19/04; C09K19/30; C09K19/34; C09K19/42; C09K19/44; C09K19/46; (IPC1-7): C07C43/225; C07C25/18; C07D319/06; C07D309/06; C09K19/30; C09K19/34; C09K19/42; G02F1/13
Foreign References:
JPH06228037A1994-08-16
GB2249309A1992-05-06
Other References:
MATHARU A. S., WILSON R. C., BYRON D. J.: "THE SYNTHESIS AND COMPARISON OF THE LIQUID CRYSTALLINE PROPERTIES OF CERTAIN 1-(4'N-ALKOXYPOLYFLUOROBIPHENYL-4-YL)-2-(TRANS-4-N-PENTYLCYCLOHEXYL)-ETHENES AND -ETHANES CARRYING FOUR, SIX OR EIGHT FLUORO-SUBSTITUENTS.", LIQUID CRYSTALS, TAYLOR & FRANCIS, vol. 23., no. 04., 1 January 1997 (1997-01-01), pages 575 - 588., XP002918599, ISSN: 0267-8292, DOI: 10.1080/026782997208181
BYRON D. J., MATHARU A. S., WILSON R. C.: "THE SYNTHESIS AND LIQUID CRYSTAL PROPERTIES OF CERTAIN 1-(4'-N-ALKOXY-2,2',3,3',5,5',6,6'-OCTAFLUOROBIPHENYL-4-YL)- 2-(TRANS-4-N-PENTYLCYCLOHEXYL)-ETHANES AND -ETHENES.", LIQUID CRYSTALS, TAYLOR & FRANCIS, vol. 19., no. 01., 1 July 1995 (1995-07-01), pages 39 - 45., XP000536256, ISSN: 0267-8292
See also references of EP 1026143A4
Attorney, Agent or Firm:
Kawakita, Takenaga (Sowa Building 3-6, Nihonbashi-kayabacho 2-chome Chuo-ku Tokyo, 103-0025, JP)
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