Patent ID: 7651630
Filing Date: 2010-01-26
Classification: C09K

Abstract:
1. A nematic liquid crystal composition, comprising: 10 to 80% by mass of either one or at least two compounds represented by general formula (I) as a first component: (wherein R 1 represents an alkenyl group of 2 to 10 carbon atoms, in which one CH 2 group, or at least two CH 2 groups that are not adjacent, may be substituted with O and/or S, and one or at least two hydrogen atoms may be substituted with F or Cl; R 2 represents an alkenyl group of 2 to 10 carbon atoms or an alkenyloxy group of 3 to 10 carbon atoms; and m represents 0, 1, or 2); and 20 to 70% by mass of either one or at least two compounds represented by general formula (II) as a second component: (wherein R 3 and R 4 each represent, independently, an alkyl group of 1 to 10 carbon atoms, an alkoxy group of 1 to 10 carbon atoms, an alkenyl group of 2 to 10 carbon atoms, or an alkenyloxy group of 3 to 10 carbon atoms; B 1 and B 2 each represent, independently, a group selected from the group consisting of (a) a trans-1,4-cyclohexylene group (in which one CH 2 group, or at least two CH 2 groups that are not adjacent, may be substituted with an oxygen atom or a sulfur atom), (b) a 1,4-phenylene group (in which one or at least two CH groups may be substituted with a nitrogen atom), and (c) a 1,4-cyclohexenylene group, a 1,4-bicyclo[2.2.2]octylene group, a piperidine-1,4-diyl group, a naphthalene-2,6-diyl group, a decahydronaphthalene-2,6-diyl group, and a 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, in which a hydrogen atom of the above group (a), group (b), or group (c) may be substituted with CN or halogen; Y 1 and Y 2 each represent, independently, —CH 2 CH 2 —, —CH═CH—, —CH(CH 3 )CH 2 —, —CH 2 CH(CH 3 )—, —CH(CH 3 )CH(CH 3 )—, —CF 2 CF 2 —, —CF═CF—, —CH 2 O—, —OCH 2 —, —OCH(CH 3 )—, —CH(CH 3 )O—, —(CH 2 ) 4 —, —(CH 2 ) 3 O—, —O(CH 2 ) 3 —, —C≡C—, —CF 2 O—, —OCF 2 —, —COO—, —OCO—, —COS—, —SCO—, or a single bond; in the case where pluralities of Y 2 and B 2 exist, a plurality of Y 2 or B 2 may be the same or different; and p represents 0, 1, or 2), wherein a dielectric constant anisotropy is negative.