Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
2,3-DIFLUOROPHENYL DERIVATIVES HAVING NEGATIVE VALUE OF PERMITTIVITY ANISOTROPY, LIQUID-CRYSTAL COMPOSITION, AND LIQUID-CRYSTAL DISPLAY ELEMENT
Document Type and Number:
WIPO Patent Application WO/1999/021815
Kind Code:
A1
Abstract:
Liquid-crystalline compounds having a large negative value of permittivity anisotropy and 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 2,3-difluorophenyl derivatives represented by general formula (1) having a 2,3-difluorophenyl moiety and the liquid-crystal composition contains any of the compounds, while the liquid-crystal display element is formed from this liquid-crystal composition: wherein Ra and Rb each represents C¿1-10? alkyl or alkoxy, provided that in at least either, any at least one methylene group has been replaced with cyclopropane-1,2-diyl, -CF¿2?-, or -CFH-; rings A¿1? to A¿4? each represents cyclohexane-1,4-diyl or 1,4-phenylene, provided that at least either of rings A¿3? and A¿4? is 2,3-difluoro-1,4-phenylene; Z¿1?, Z¿2?, and Z¿3? each represents a single bond, -(CH¿2?)¿p?-, -CO¿2?-, -CF¿2?O-, or -CH¿2?O-; p is an integer of 2 to 4; and m and n each is 0 or 1.

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)
Yagi, Hiroo (11-8, Inagedaicho Inage-ku Chiba-shi Chiba, 263-0032, 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/JP1998/004833
Publication Date:
May 06, 1999
Filing Date:
October 26, 1998
Export Citation:
Click for automatic bibliography generation   Help
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)
Yagi, Hiroo (11-8, Inagedaicho Inage-ku Chiba-shi Chiba, 263-0032, 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; C07D241/12; C07D319/06; C09K19/04; C09K19/30; C09K19/34; C09K19/42; C09K19/44; C09K19/46; (IPC1-7): C07C43/225; C07C25/18; C07C69/74; C07C69/76; C07D309/06; C07D319/06; C09K19/10; C09K19/20; C09K19/30; C09K19/34; C09K19/42; G02F1/13
Foreign References:
JPH08165258A1996-06-25
JPH07267885A1995-10-17
JPH0797354A1995-04-11
JPH0892137A1996-04-09
JPH0881417A1996-03-26
JPH02115145A1990-04-27
JPH02503435A1990-10-18
JPH04501864A1992-04-02
Attorney, Agent or Firm:
Kawakita, Takenaga (Sowa Building 3-6, Nihonbashi-kayabacho 2-chome Chuo-ku Tokyo, 103-0025, JP)
Download PDF: