摘要:
A cyclohexenylethane compound is disclosed which is represented by the formula ##STR1## wherein R is an alkyl group having 1 to 10 carbon atoms, X is an alkyl group or an alkoxy group having 1 to 10 carbon atoms, a cyano group, a bromine atom or a fluorine atom, Y is a hydrogen atom or a fluorine atom, m is 0 or 1, and n is 0 or 1.The above-mentioned cyclohexenylethane compound of the present invention exhibits a liquid crystal phase having a broad range, has a good compatibility with known liquid crystal compounds, can expand the liquid crystal temperature range of a liquid crystal composition, can expand the drive temperature range of a liquid crystal element, and is very stable to environmental factors.
摘要:
A compatible optical disk in which information can be reproduced by a player normally used exclusively for reproduction, and writing, rewriting and erasure can be performed, comprises a recording film material characterized in that the reflectivity of a flat portion of the disk is lower than 50% in an erased or unrecorded state and the reflectivity of a recorded area is increased by recording by an irradiation of light, a light beam-guiding groove (12) formed on the surface of the disk substrate so that information is recorded or read out along the trough portion (12) or crest portion (17) of the guiding groove, and the reflectivity is enhanced in the crest portion (17) between the troughs or in the trough portion (12) between the crests.
摘要:
A liquid crystal substance having a large optical anisotropy value, a low viscosity and a superior compatibility with other liquid crystal compounds at low temperatures and also raising the degree of choice of liquid crystal materials and a liquid crystal composition containing the above substance are provided, which substance is a 4-(trans-4-alkylcyclohexyl)-3',4'-difluorotolan expressed by the formula ##STR1## wherein R represents an alkyl group of 1 to 10 carbon atoms.
摘要:
A cyclohexane derivative having a low viscosity, a broad nematic phase temperature range, a good compatibility with other liquid crystal components even at low temperatures and a large positive dielectric anisotropy value, and a liquid crystal composition containing the cyclohexane derivative are provided, which cyclohexane derivative is expressed by the formula ##STR1## wherein R represents an alkyl group of 1-10 C and A represents a hydrogen atom, a halogen atom of F, Cl or Br or a cyano group.
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 1,4-dipyrimidinylbenzene derivative which is useful as a component constituting a liquid crystal composition which is superior in properties and also physically and chemically stable, as a material for liquid crystal display elements, and a liquid crystal composition containing the same are provided, which derivative is expressed by the formula ##STR1## wherein X represents an alkyl group or an alkoxy group each of 1 to 10 carbon atoms, methylthio group or cyano group and Y represents an alkyl group or an alkoxy group each of 1 to 10 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.
摘要:
Novel compounds capable of improving various characteristics required for liquid crystal compositions when added to liquid crystal substances, and liquid crystal compositions containing the same are provided, which novel compounds are halogenopyrimidine derivatives expressed by the general formula ##STR1## wherein R.sup.1 represents an alkyl group of 1 to 10 carbon atoms, R.sup.2 represents a halogen atom of F, Cl of Br and l represents 1 or 2.
摘要:
Novel organic compounds useful as a component of liquid crystal compositions are provided which compounds are 5-substituted-2-(4'-substituted biphenylyl)pyrimidines and 5-substituted-2-[4'-(trans-4"-substituted cyclohexyl) phenyl]pyrimidines expressed by the general formula ##STR1## wherein R.sub.1 and R.sub.2 each represent an alkyl group or an alkyloxy group having 1 to 10 carbon atoms and ##STR2## represents cyclohexane ring or benzene ring.
摘要:
Novel liquid crystal compounds which are useful as a component constituting liquid crystal compositions and particularly capable of broadening the liquid crystal temperature range of the compositions due to high clearing point of the compounds, and liquid crystal compositions comprising the same, are provided, which compounds are 4-(trans-4'-alkyloxymethylcyclohexyl)benzoic acid esters having the general formula ##STR1## wherein X represents ##STR2## each represent an alkyl group of 1 to 10 carbon atoms.