Patent TW-414805-B (TW)
Title: Liquid crystal composition and its use as a liquid crystal element
Inventor: YAMAMOTO KYOKO
IPC: C09K19/04
Filed: 1996-12-24
Granted: 2000-12-11
Abstract: A liquid crystal composition comprising at least one compound of the formula (1), wherein J01 represents a hydrogen or fluorine atom, a cyano group or a group of the formula: J03 (O) m01 in which J03 is a C1-C12 alkyl group, a C2-C12 alkenyl group or a C2-C12 alkynyl group, each of which may be substituted with a fluorine atom; E01, E02 and E03 represent, independent of each other, [Figure], Z01 and Z02 represent, independent of each other, a single bond, -(CH2)n01-, -C<triple bond>C-, -CH=CH-, -CH2O-, -OCH2-, -COO-, -OCO- or -O-, and Z03 represent a single bond, -(CH2)n01-, -C<triple bond>C-, -CH=CH-, -CH2O-, -OCH2-, -COO-, -OCO-,-O- or -CF=CF-, provided that Z01, Z02 and Z03 are not single bonds at the same time; n01 represents and integer of 1 to 4; m01, o01, p01 and q01 represent, independent of each other, 0 or 1; X1, X2, X3, X4, X5, X6, X7 and X8 represent, independent of each other, CH, CF or N; G01 and G02 represent, independent of each other, a hydrogen or fluorine atom, provided that they are not hydrogen atoms at the same time; w01 represent -C<triple bond>C- or -CY01=CY02- in which Y01 and Y02 represent, independent of each other a hydrogen or fluorine atom, provided that Y01 and Y02 are hydrogen atoms, q01 is zero and E01 and E02 are not, [Figure] when Z03 represents -CF=CF-, or provided that W01 represents -CY01=CY02- in which at least one of Y01 and Y02 is a fluorine atom when Z03 represent -C<triple bond>C- and q01 is 0; and J02 represents a C1-C12 alkyl group or a C1-C12 alkoxyalkyl group, each of which may be substituted with at least one fluorine atom, and at least one compound of the formula (2), wherein the rings A, B, C and D represent, independent of each other, 1,4-phenylene which may be substituted with 1, 2 or 3 fluorine atoms, 1,4-cyclohexylene, 1,4-cyclohexelene, 4,1-cyclohexelene, 2,5-cyclohexelene, 5,2-cyclohexelene, 3,6-cyclohexelene, 6,3-cyclohexelene, 2,5-pyrimidinediyl, 5,2-pyrimidinediyl, 2,5-pyridinediyl, 5,2-pyridinediyl, 2,5-dioxanediyl or 5,2-dioxanediyl; R02 is a hydrogen atom, a C1-C12 alkyl group, a C2-C12 alkenyl group, a C1-C16 alkoxy group or a C2-C16 alkoxyalkyl group; R03 is a hydrogen or fluorine atom, a fluoromethyl group, a difluoromethyl group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethyl group, a cyano group, a C1-C12 alkyl group, a C2-C12 alkenyl group, a C1-C16 alkoxy group or a C2-C16 alkoxyalkyl group; Z04, Z05 and Z06 represent, independent of each other, -COO-, -OCO-, -OCH2-, -CH2O-, a C1-C5 alkylene group, a C2-C5 alkenylene group, a C2-C5 alkynylene group or a single bond; E04 and G03 represent independent of each other, a methylene group or -O-; a01, b01, c01, d01 and e01 represent, independent of each other, 0 or 1, provided that the sum of b01, c01 and d01 is at least 1 (one), with the proviso that a01 is 0 when R02 is an alkoxy group, that e01 is 0 when R03 is an alkoxy group, or with the proviso that, in the case where R02 and R03 are not alkoxy groups, a01 is 1 when b01 is 1 (one) and the ring A is 1,4-phenylene, 2,5-pyrimidinediyl, 5,2-pyrimidinediyl, 2,5-pyridinediyl or 5,2-pyridinediyl or when b01 is 0, c01 is 1 and the ring D is 1,4-phenylene, 2,5-pyrimidinediyl, 5,2-pyrimidinediyl, 2,5-pyridinediyl or 5,2-pyridinediyl or when b01 is 0, c01 is 0, d01 is 1 and the ring C is 1,4-phenylene, 2,5-pyrimidinediyl, 5,2-pyrimidinediyl, 2,5-pyridinediyl or 5,2-pyridinediyl, or e01 is 1 when the ring D is 1,4-phenylene, 2,5-pyrimidinediyl, 5,2-pyrimidinediyl, 2,5-pyridinediyl or 5,2-pyridinediyl, which compound (2) is not a compound of the formula (1) , wherein a mole ratio of the compound of the formula (1) to the compound of the formula (2) is between 5:50 and 95:50.