Patent ID: 6214256
Filing Date: 2001-04-10
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);as a third component at least one of the compounds of the following formulas (3-1) and (3-2); andas a fourth component at least one of the compounds of the following formulas (4-1) to (4-3) ##STR28##in which R.sub.1, R.sub.2, R.sub.6, R.sub.8, R.sub.10, R.sub.11 and R.sub.13 each independently represent an alkyl group of 1-10 carbons; R.sub.3 represents an alkyl group of 1-10 carbons, an alkoxymethyl group of 2-10 carbons or an alkenyl group of 2-10 carbons; R.sub.4 represents an alkyl group of 1-10 carbons or an alkenyl group of 2-10 carbons; R.sub.5 and R.sub.7 each independently represent an alkenyl group of 2-10 carbons wherein one or more hydrogen atoms may be replaced by fluorine atoms; R.sub.9 represents an alkyl group of 1-10 carbons or an alkoxy group of 1-10 carbons; R.sub.12 represents an alkyl group of 1-10 carbons or an alkoxymethyl group of 2-10 carbons; A.sub.1 represents trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl; A.sub.2 and A.sub.4 each independently represent trans-1,4-cyclohexylene or 1,4-phenylene;-A.sub.3 represents 1,4-phenylene which may be substituted by F; X.sub.1, X.sub.2 and X.sub.3 each independently represent H or F; Z.sub.1 represents --COO--, --CH.sub.2 CH.sub.2 -- or a single bond; and m represents 0 or 1.