LIQUID CRYSTAL COMPOUND HAVING NEGATIVE ANISOTROPIC VALUE OF DIELECTRIC CONSTANT, LIQUID CRYSTAL COMPOSITION CONTAINING THE SAME AND LIQUID CRYSTAL DISPLAY ELEMENT USING THE COMPOSITION

Japanese Patent JPH10236990

A

To obtain a low-viscosity liquid crystal compound suitable for a liquid crystal display element, excellent in negative anisotropic value of dielectric constant, optical anisotropy, voltage retention, stability and compatibility, containing a difluorocyclohexadienediyl group in a skeleton structure.

This liquid crystal compound containing a 2,3- difluorocyclohexa-1,3-diene-1,4-diyl group in a skeleton structure is shown by the formula [R1 and Y1 are each a 1-20C alkyl, H, a halogen, cyano, cyanic acid, etc.; X1 to X4 are each a single bond, (CH2)2, CH=CH, C≤, COO, etc.; rings A1 to A5 are each 2,3-diflyuorocyclohexa-1,3-diene-1,4-diyl, trans- cyclohexene-1,4-diyl, 1,4-phenylene, etc.; a1 to a5 are each 0 or 1; a1+a2+a3+a4+ a5≥1].

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MIYAZAWA KAZUTOSHI
YANO HITOSHI

JP6001897A

September 08, 1998

February 27, 1997

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CHISSO CORP

G02F1/13; C07C17/18; C07C23/18; C07C23/20; C07C25/18; C07C43/225; C07C45/30; C07C69/75; C07C69/753; C07C69/76; C07C69/773; C07C69/90; C07C255/45; C07C255/46; C07F7/08; C09K19/04; C09K19/30; C09K19/42; (IPC1-7): C07C23/18; C07C23/20; C07C25/18; C07C43/225; C07C69/75; C07C69/753; C07C69/76; C07C69/773; C07C69/90; C07C255/45; C07F7/08; C09K19/04; C09K19/42; G02F1/13

Katsuhiko Nonaka

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