Patent TW-424108-B (TW)
Title: Liquid crystal composition and liquid crystal display element
Inventor: TERASHIMA KANETSUGU
IPC: C09K19/42
Filed: 1996-04-02
Granted: 2001-03-01
Abstract: A liquid crystal composition which comprises 1 to 15% by weight of at least one compound as a first component selected from the group consisting of compounds represented by the formula (I-a) and (I-b), wherein each of R1 and R2 is an alkyl group having 1 to 7 carbon atoms, 8 to 40% by weight of at least one compound as a second component selected from the group consisting of compounds represented by the formula (II), wherein R3 is an alkyl group having 1 to 7 carbon atoms or an alkenyl group having 2 to 7 carbon atoms, and the cyclohexyl ring is in a trans conformation, 10 to 30% by weight of at least one compound as a third component selected from the group consisting of compounds represented by the formula (III), wherein R4 is an alkyl group or an alkoxy group having 1 to 7 carbon atoms, R5 is an alkenyl group or an alkenyloxy group having 2 to 7 carbon atoms, and the cyclohexyl ring is in a trans conformation, and 10 to 45% by weight of at least one compound as a fourth component selected from the group consisting of compounds represented by the formulas (IV-a), (IV-b), (IV-c), (IV-d), wherein R6 is an alkenyl group having 2 to 7 carbon atoms, R7 is an alkyl group or an alkoxy group having 1 to 7 carbon atoms, and the cyclohexyl ring is in a trans conformation, wherein R8 is an alkyl group having 1 to 7 carbon atoms, R9 is an alkenyl group or an alkenyloxy group having 2 to 7 carbon atoms, and the cyclohexyl ring is in a trans conformation, wherein R10 is an alkenyl group having 2 to7 carbon atoms, R11 is an alkyl group or an alkoxy group having 1 to 7 carbon atoms, and the cyclohexyl ring is in a trans conformation, wherein R12 is an alkyl group having 1 to 7 carbon atoms, R13 is an alkoxyalkyl group having 2 to 7 carbon atoms, and the cyclohexyl ring is in a trans conformation, optionally, 5 to 25% by weight of at least one compound as a fifth component selected from the group consisting of compounds represented by the formula (V), wherein R14 is an alkyl group having 1 to 7 carbon atoms or an alkenyl group having 2 to 7 carbon atoms, X is a single bond or -COO-, and the cyclohexyl ring is in a trans conformation, optionally, 1 to 10% by weight of at least one compound as a sixth component selected from the group consisting of compounds represented by the formula (VI), wherein R15 is an alkoxyalkyl group having 2 to 7 carbon atoms, and the cyclohexyl ring is in a trans conformation, optionally, 1 to 15% by weight of at least one compound as a seventh component selected from the group consisting of compounds represented by the formula (VII), wherein each of R16 and R17 is independently an alkyl group or an alkoxy group having 1 to 7 carbon atoms or an alkenyl group having 2 to 7 carbon atoms, and optionally, 1 to 10% by weight of at least one compound as a eighth component selected from the group consisting of compounds represented by formula (VIII), wherein R18 is an alkyl group having 1 to 7 carbon atoms or an alkenyl group having 2 to 7 carbon atoms, R19 is an alkyl group having 1 to 7 carbon atoms, and the cyclohexyl ring is in a trans conformation.