Patent ID: 6162372
Filing Date: 2000-12-19
Classification: C09K

Abstract:
A liquid crystal composition which comprises:as a first component at least one of the compounds of the following formulas (1-1) and (1-2);as a second component at least one of the compounds of the following formula (2); andas a third component at least one of the compounds of the following formulas (3-1) to (3-4) ##STR22## in which R.sub.1, R.sub.2 and R.sub.3 each independently represent an alkyl group of 1-10 carbons wherein any one of the --CH.sub.2 -- groups may be replaced by --O-- or --CH.dbd.CH--; R.sub.4, R.sub.5 and R.sub.6 each independently represent an alkyl group of 1-10 carbons wherein any one of the --CH.sub.2 -- groups may be replaced by --O-- or --CH.dbd.CH--, or wherein one or more hydrogen atoms may be replaced by fluorine atoms; R.sub.7 represents Cl, F or an alkyl group of 1-10 carbons wherein any one of the --CH.sub.2 -- groups may be replaced by --O--; R.sub.8, R.sub.9 and R.sub.11 each independently represent an alkyl group of 1-10 carbons; R.sub.10 represents an alkyl group of 1-10 carbons wherein any one of the --CH.sub.2 -- groups may be replaced by --O--; A.sub.1 represents trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl; A.sub.2, A.sub.3, A.sub.4, A.sub.5 and A.sub.7 each independently represent trans-1,4-cyclohexylene or 1,4-phenylene; A.sub.6 represents 1,4-phenylene which may be substituted by F; Z.sub.1 represents --COO--, --CH.sub.2 CH.sub.2 -- or a single bond; Z.sub.2 represents --C.tbd.C-- or a single bond; m and n each independently represent 0 or 1; and X.sub.1, X.sub.2 and X.sub.3 each independently represent H or F.