Back to results
US 5,382,379 AGranted
Cyclohexane derivative
AssigneeChisso Corporation
InventorsYuichi Onji, Makoto Ushioda, Shuichi Matsui, Tomoyuki Kondo, Yasuyuki Goto
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeChisso Corporation
InventorsYuichi Onji, Makoto Ushioda, Shuichi Matsui, Tomoyuki Kondo, Yasuyuki Goto
Estimating the term…
A novel liquid crystal material having an alkenyl group at the end of the molecule, and having a low viscosity is provided. When the compound is added to a display element it is able to reduce the threshold voltage of the resulting display element. The compound is expressed by the formula (I), ##STR1## wherein X is a F atom, a trifluoromethyl group, a trifluoromethoxy group or a difluoromethoxy group, --A-- is 1,4-cyclohexylene or 1,4-phenylene, --B-- is 1,4-cyclohexylene, l is 0, 1 or 2, m is 0, 1 or 2, l+m.gtoreq.1, Z is --CH.sub.2 CH.sub.2 -- or single bond, n is an integer of 0 to 4, R is a H atom or a linear or branched alkyl group of 1-7C, and when R is an alkyl group, the double bond has a trans-configuration. The compounds of the present invention are suitable as liquid crystal material for STN display element, and further are chemically stable; hence it is possible to prepare a composition having a superior multiplex characteristic and capable of effecting a low voltage drive.
A cyclohexane derivative expressed by the formula (I) ##STR15## wherein X represents a fluorine atom, a trifluoromethyl group, a trifluoromethoxy group or a difluoromethoxy group, --A-- represents 1,4-cyclohexylene or 1,4-phenylene, --B-- represents 1,4-cyclohexylene, l represents 0, 1 or 2, m represents 0, 1 or 2, and l+m=1or 2, Z represents --CH.sub.2 CH.sub.2 -- or a single bond, n represents an integer of 0 to 4, R represents a hydrogen atom or a linear alkyl group of 1 to 7 carbon atoms, and when R represents an alkyl group, the double bond has a trans-configuration;
A liquid crystal composition comprising at least one liquid crystalline compound and at least one cyclohexane derivative expressed by the formula (I) ##STR16## wherein X represents a fluorine atom, a trifluoromethyl group, a trifluoromethoxy group or a difluoromethoxy group, --A-- represents 1,4-cyclohexylene or 1,4-phenylene, --B-- represents 1,4-cyclohexylene, l represents 0, 1 or 2, m represents 0, 1 or 2, and l+m=1 or 2, Z represents --CH.sub.2 CH.sub.2 -- or a single bond, n represents an integer of 0 to 4, R represents a hydrogen atom or a linear alkyl group of 1 to 7 carbon atoms, and when R represents an alkyl group, the double bond has a trans-configuration;
Dependencies are inferred from the claim text.