摘要:
New liquid-crystalline ester compounds which exhibit a liquid-crystalline phase within a broad temperature range and have a positive, dielectric anisotropy, and a liquid-crystalline composition comprising the same are provided which ester compounds are expressed by the general formula ##STR1## wherein R represents hydrogen atom or an alkyl group of 1 to 10 carbon atoms; ##STR2## each represent ##STR3## X represents ##STR4## Y represents hydrogen atom, F, Cl or CN; and Z represents F, Cl or CN.
摘要:
New liquid-crystalline ester compounds which exhibit a liquid-crystalline phase within a broad temperature range and have a positive, dielectric anisotropy, and a liquid-crystalline composition comprising the same are provided which ester compounds are expressed by the general formula ##STR1## wherein R represents hydrogen atom or an alkyl group of 1 to 10 carbon atoms; ##STR2## X represents ##STR3## Y represents hydrogen atom, F, Cl or CN; and Z represents F, Cl or CN.
摘要:
Liquid crystal compounds useful as a component of liquid crystal compositions having superior actuation characteristics within a broader temperature range are provided, which compounds are carboxylic acid cyclohexyl ester derivatives expressed by the general formula ##STR1## wherein A represents ##STR2## R- or RO-; B represents ##STR3## R represents an alkyl group or an alkoxy group, both having 1 to 10 carbon atoms; and R' represents an alkyl group having 1 to 10 carbon atoms.
摘要:
Liquid-crystalline compounds which exhibit a liquid crystalline phase within a broader temperature range and also have a high transparent point and yet a low viscosity, and liquid-crystalline compositions containing at least one kind of the above compounds are provided, which compounds are high temperature liquid-crystalline substances consisting of 4 or 5 six-member-rings, expressed by the general formula ##STR1## wherein R and R' each represent hydrogen atom or an alkyl group or an alkoxy group, each having 1 to 10 carbon atoms; ##STR2## and n represents 0 or 1.
摘要:
Novel compounds having a small dielectric anisotropy value (.DELTA..epsilon.), a low viscosity and a small .gamma. value (ratio of saturation voltage to threshold voltage) indicating sharpness, and liquid crystal compositions containing the same are provided, which compounds are 2,4-difluorobenzene derivatives of trans-4-alkylcyclohexanes expressed by the general formula ##STR1## wherein n is 1 or 2, m is 0 or 1 and R represents an alkyl group of 1-10 carbon atoms.
摘要:
Liquid crystal compounds used for liquid crystal display elements are provided, which exhibit a liquid crystal phase within a broad temperature range and also have a low viscosity. The compounds are cyano-mono- or diphenylbicyclohexane derivatives expressed by the general formula ##STR1## wherein R represents hydrogen or an alkyl group of 1 to 15 carbon atoms and n is 1 or 2.
摘要:
A novel cyclohexane derivative having a good stability, a low viscosity and a large dielectric aniostropy value and a liquid crystal composition containing the same are provided, which derivative is expressed by the formula ##STR1## wherein R represents an alkyl group of 1 to 10 carbon atoms; A represents hydrogen, halogen or cyano group; l represents 1 or 2; and m represents 0 or 1.
摘要:
A novel cyclohexane derivative having a good stability, a low viscosity and a large dielectric aniostropy value and a liquid crystal composition containing the same are provided, which derivative is expressed by the formula ##STR1## wherein R represents an alkyl group of 1 to 10 carbon atoms; A represents hydrogen, halogen or cyano group; l represents 1 or 2; and m represents 0 or 1.
摘要:
A novel liquid crystal compound suitable to use as a component of liquid crystal dielectrics and a liquid crystal composition containing the same are provided, which compound is a dihalogeno-aromatic compound expressed by the formula ##STR1## wherein R represents an alkyl group or an alkoxy group, each of 1 to 12 carbon atoms, or an alkoxymethyl group of 2 to 12 carbon atoms.
摘要:
A novel compound which exhibits superior effectiveness particularly in reducing the driving voltage of liquid crystal display elements, and a liquid crystal composition containing the same are provided, which compound is a 5-alkyl-2-(3,4-difluorophenyl)pyrimidine expressed by the formula ##STR1## wherein m represents an integer of 1 to 8.