C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 25/22 (2006.01) C07C 17/26 (2006.01) C07C 17/269 (2006.01) C07C 17/354 (2006.01) C07C 25/18 (2006.01) C07C 25/24 (2006.01) C07C 43/225 (2006.01) C07C 69/035 (2006.01) C07C 69/76 (2006.01) C07C 69/96 (2006.01) C07C 255/50 (2006.01) C07C 261/02 (2006.01) C07C 331/08 (2006.01) C07D 213/26 (2006.01) C07D 237/08 (2006.01) C07D 239/26 (2006.01) C07D 241/12 (2006.01) C07D 319/06 (2006.01) C09K 19/32 (2006.01) C09K 19/34 (2006.01)
Patent
CA 2269561
Disclosed is a novel liquid-crystalline compound which is a naphthalene derivative useful as an electro-optical liquid crystal display material, a liquid crystal composition containing such naphthalene derivatives and a liquid crystal display device comprising the same. The naphthalene derivative provided by the present invention exhibits an excellent liquid-crystallinity and miscibility with currently widely used liquid crystal compositions or compositions. The addition of the naphthalene derivative makes it possible to drastically lower the threshold voltage of the liquid crystal composition while maintaining its high response. The naphthalene derivative of the present invention is characterized by a large birefringence index. Further, most of the naphthalene derivative of the present invention has no strongly polar group in its molecule and thus can also be used for active matrix driving. Moreover, as shown in the foregoing examples, the naphthalene derivative of the present invention can be easily produced and is colorless and chemically stable. Accordingly, the liquid crystal composition comprising tha naphthalene derivative of the present invention is extremely useful as a practical liquid crystal composition, particularly a liquid crystal composition which can operate within a wide temperature range and requires a high speed response and a low voltage driving.
Negishi Makoto
Osawa Masashi
Takatsu Haruyoshi
Takehara Sadao
Dainippon Ink And Chemicals Inc.
Riches Mckenzie & Herbert Llp
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