Abstract: The invention provides a photocuring epoxy adhesive agent having excellent polymerization conversion rate at low temperature, and excellent adhesive strength and resistance to moisture permeation, and also provides a cured product having good productivity. The photocuring epoxy adhesive agent of the invention contains: (A) an epoxy monomer or oligomer; (B) a photo cationic polymerization initiator; and (C) a layered silicate. Since the adhesive agent is photocurable, curing can be performed at low temperature, and the adhesive agent shows excellent adhesive strength. Moreover, since the adhesive agent can be cured in a short time, productivity is excellent. The cured resin composition has high resistance to moisture permeation.

Abstract: Disclosed is a liquid crystal display element which is composed of a pair of substrates (1) at least one of which is transparent. The liquid crystal display element comprises, between the pair of substrates, a transparent electrode (2), an aligning agent (3) that contains at least reactive monomers and/or oligomers (5), and a liquid crystal layer. The liquid crystal display element is characterized in that an alignment layer is obtained by polymerizing the reactive monomers or oligomers contained in the aligning agent, and the liquid crystal layer is composed of a liquid crystal composition that contains a compound (4) having at least one benzene ring in each molecule, said benzene ring containing at least one fluorine atom and being disubstituted by halogen atoms.

Abstract: Disclosed is a liquid crystal display element which is composed of a pair of substrates (1) at least one of which is transparent. The liquid crystal display element comprises, between the pair of substrates, a transparent electrode (2), an aligning agent (3) that contains at least reactive monomers and/or oligomers (5), and a liquid crystal layer. The liquid crystal display element is characterized in that an alignment layer is obtained by polymerizing the reactive monomers or oligomers contained in the aligning agent, and the liquid crystal layer is composed of a liquid crystal composition that contains a compound (4) having at least one benzene ring in each molecule, said benzene ring containing at least one fluorine atom and being disubstituted by halogen atoms.

Abstract: A compound represented by the following formula (1): wherein R1 and R2 are, for example alkyl; T1, T2 and T3 are independently tetrahydropyran-2,5-diyl or tetrahydropyran-3,6-diyl; A1 and A2 are, for example 1,4-cyclohexylene; Z1, Z2, Z3 and Z4 are, for example, a single bond; i, j, k, m and n are, for example 0 or 1; and i+j+k+m+n is, for example 2 or 3.

Abstract: A liquid crystal composition having a negative dielectric anisotropy and including a first component, which is a liquid crystal compound having a chroman ring, in which two hydrogens are replaced by fluorine, a second component, which is a liquid crystal compound having phenylene in which two hydrogens are replaced by fluorine and chlorine, and a particular third component, and a liquid crystal display device including the liquid crystal composition.

Abstract: A dihydrocoumarin ring-containing compound of the invention is represented by the following formula (1): wherein R represents hydrogen or an alkyl; A1 to A3 each represents 1,4-cyclohexylene or 1,4-phenylene; Z1 to Z3 each represents a single bond, —(CH2)2—, —CH2O—, —OCH2—, —CF2O—, —OCF2—, —CH?CH—, —CF?CF—, —C?C—, —(CH2)4—, —O(CH2)2O—, —(CH2)2CF2O—, —(CH2)2OCF2—, —CF2O(CH2)2—, —OCF2(CH2)2—, —CH?CH—CH2O—, or —OCH2—CH?CH—; X represents hydrogen, fluorine, chlorine, —CN, —CF3, —CHF2, —CH2F, —OCF3, —OCHF2, or —OCH2F; G represents oxygen or sulfur; and n and m each represents 0, 1, or 2.

Abstract: A liquid crystal composition having a negative dielectric anisotropy and including a first component, which is a liquid crystal compound having a chroman ring, in which two hydrogens are replaced by fluorine, a second component, which is a liquid crystal compound having phenylene in which two hydrogens are replaced by fluorine and chlorine, and a particular third component, and a liquid crystal display device including the liquid crystal composition.

Abstract: The present invention relates to a compound having a chroman ring, which has good thermal and optical stability, adequate optical anisotropy, adequate dielectric anisotropy and superior compatibility with other liquid crystal compounds, a liquid crystal composition comprising the compound, and a liquid crystal device comprising the composition.

Abstract: A dihydrocoumarin ring-containing compound of the invention is represented by the following formula (1): wherein R represents hydrogen or an alkyl; A1 to A3 each represents 1,4-cyclohexylene or 1,4-phenylene; Z1 to Z3 each represents a single bond, —(CH2)2—, —CH2O—, —OCH2—, —CF2O—, —OCF2—, —CH?CH—, —CF?CF—, —C?C—, —(CH2)4—, —O(CH2)2O—, —(CH2)2CF2O—, —(CH2)2OCF2—, —CF2O(CH2)2—, —OCF2(CH2)2—, —CH?CH—CH2O—, or —OCH2—CH?CH—; X represents hydrogen, fluorine, chlorine, —CN, —CF3, —CHF2, —CH2F, —OCF3, —OCHF2, or —OCH2F; G represents oxygen or sulfur; and n and m each represents 0, 1, or 2.

Abstract: The present invention relates to a compound having a chroman ring, which has good thermal and optical stability, adequate optical anisotropy, adequate dielectric anisotropy and superior compatibility with other liquid crystal compounds, a liquid crystal composition comprising the compound, and a liquid crystal device comprising the composition.

Abstract: A compound represented by the following formula (1): wherein R1 and R2 are, for example alkyl; T1, T2 and T3 are independently tetrahydropyran-2,5-diyl or tetrahydropyran-3,6-diyl; A1 and A2 are, for example 1,4-cyclohexylene; Z1, Z2, Z3 and Z4 are, for example, a single bond; i, j, k, m and n are, for example 0 or 1; and i+j+k+m+n is, for example 2 or 3.

Abstract: Novel liquid crystal compound having a negative and absolutely large value of dielectric anisotropy, being excellent in compatibility with other liquid crystalline compounds at a low temperature and being stable chemically and physically, as well as a liquid crystal composition comprising this compound, and a liquid crystal display device comprising this liquid crystal composition are provided, said compound is expressed by the general formula (1): R1—A1—B1—A2—B2—A3—B3—Z—B4—A4—R2  (1) wherein A1, A2, A3 and A4 represent a single bond, 1,4-cyclohexylene, 1,4-phenylene which may be substituted with a fluorine atom(s) or the like; B1, B2, B3 and B4 represent a single bond, 1,2-ethylene, 1,2-ethenylene, 1,2-ethynylene, oxymethylene, methyleneoxy or the like; R1 and R2 represent an alkyl group having 1 to 10 carbon atoms or the like; and Z represents (I) to (VI): wherein X represents H or F, and Y represents difluoromethyl gr

Abstract: A aniline derivative represented by general formula (1) wherein R and R′ represent independently each other alkyl with 1 to 10 carbon, alkoxyalkyl with 1 to 10 carbon, or hydrogen; x represents cyano, halogen, haloalkyl, haloalkyloxy, or 2-cyanoethynyl; Y represents fluorine or hydrogen; na and nc represent independently each other 0 or 1; Za, Zb, and Zc represent independently each other a single bond, 1,2-ethylene, carbonyloxy, or oxymethylene; ring A1 represents 1,4-phenylene in which hydrogen may be substituted by fluorine; ring A2 and ring A3 represent independently each other 1,4-cyclohexylene, 1,4-phenylene in which hydrogen may be substituted by fluorine, or 1,3-pyrimidine-2,5-diyl.

Abstract: A liquid crystalline alkenyltolan derivative expressed by the general formula CtH2t−1—G—(CH2)m—A1—B1—(A2—B2)n—(A3—B3)p—A4—X wherein A1, A2, A3, and A4 independently represent a 1,4-cyclohexylene, 1,4-phenylene in which one or two hydrogen atoms may be replaced by a fluorine atom(s), dioxane-2,5-diyl, or pyrimidine-2,5-diyl group; B1, B2, and B3 independently represent a covalent bond, an 1,2-ethylene, 1,2-ethenylene, 1,2-ethynylene, oxymethylene, methylenoxy, carbonyloxy, or 1,4-butylene group provided that at least one of B1, B2, and B3 represents an 1,2-ethynylene group; G represents a covalent bond or an oxygen atom; CtH2t−1 represents an alkenyl group having t carbon atoms; n and p are each 0 or 1; and X represents an alkyl group having 1 to 10 carbon atoms.

Abstract: Novel liquid crystalline compounds which have a wide temperature range of liquid crystal phase, are excellent in miscibility with other liquid crystalline compounds, have a low viscosity, are low in toxicity, and are safe; liquid crystal compositions comprising the liquid crystalline compound; and liquid crystal display devices fabricated by using the composition are provided; and the compounds are cyclohexane derivatives expressed by the general formula (1) wherein R represents an alkylene chain having 2 to 10 carbon atoms in which alkylene chain ethylene group (—CH2CH2—) may be replaced by ethenylene group (—CH═CH—) or methylenoxy group (—OCH2—); and M represents COOH or CN group.

Abstract: Liquid crystalline compounds having a wide temperature range of liquid crystal phase, a high dielectric anisotropy, and a high optical anisotropy; and liquid crystal compositions and display devices containing the composition. The liquid crystalline compounds are conjugated nitrile derivatives expressed by the formula (1) ##STR1## wherein R represents an alkyl group or a fluoroalkyl group each having 1 to 10 carbon atoms, halogen atom, or cyano group provided that in the alkyl or fluoroalkyl group, one or not-adjacent two or more methylene or fluoromethylene groups may be replaced by oxygen atom or 1,2-ethenylene group; A.sub.1, A.sub.2, A.sub.3 and A.sub.4 represent 1,4-cyclohexylene group, 1,4-phenylene in which one or two hydrogen atoms on the ring may be replaced by fluorine atom, 1,3-dioxane-2,5-diyl, or pyrimidine-2,5-diyl; B.sub.1, B.sub.2, and B.sub.

Abstract: A propiolonitrile derivative of formula (I) ##STR1## wherein n1 and n2 each independently stand for 0 or 1; A1, A2 and A3 each independently represent a 1,4-phenylene, a 1,4-phenylene substituted by one or more fluorine atoms, a trans-1,4-cyclohexylene, a 1,3-dioxane-2,5-diyl or a 1,3-pyrimidine-2,5-diyl; Z1, Z2 and Z3 each independently represent a single bond, ethylene, ethenylene, ethynylene, carbonyloxy, oxycarbonyl, methyleneoxy, oxymethylene, 1,4-butylene or 1,4-butenylene; R represents a saturated, aliphatic hydrocarbyl radical of 1-10 carbons, an unsaturated, aliphatic hydrocarbyl radical of 2-10 carbons, a saturated or unsaturated, aliphatic hydrocarbyl radical of 1-10 carbons containing one or more ether linkages (--O--) in the chain and a saturated or unsaturated, fluoro-substituted aliphatic hydrocarbyl radical of 1-10 carbons containing one or more fluorine atoms in the chain; X1 and X2 each independently represent H, F or Cl;provided that at least one of X1 and X2 is F or Cl, when both n1 and n2

Abstract: An acrylonitrile derivative expressed by the following general formula I, a composition comprising the derivative and having an improved viscosity and optical anisotropy, and a liquid crystal display device: ##STR1## wherein rings A.sup.1 to A.sup.3 represent phenylene, cyclohexylene, dioxane, or pyrimidine, R.sup.

Abstract: A liquid crystalline compound expressed by the general formula (1) ##STR1## (wherein R.sub.1 is an alkyl group having 1 to 12 carbon atoms and one CH.sub.2 group in the alkyl group may be replaced by oxygen atom or --CH.dbd.CH--; X represents hydrogen atom or fluorine atom; Y represents hydrogen atom or alkoxy group having 1 to 5 carbon atoms; l and m independently represent 0 or 1, respectively; and n and p independently represent an integer of 0 to 10, respectively, and when p is 0, n is 1 or more, and when Y is an alkoxy group, X is a fluorine atom and p is 0.)Liquid crystal compositions which are suitable for use in liquid crystal display devices, have a high clearing point, and have a function of decreasing viscosity, and novel liquid crystalline compounds useful as a component of the liquid crystal compositions are provided.

Abstract: A novel liquid crystalline compound having a high elastic constant ratio (K.sub.33 /K.sub.11) and an improved solubility thereof in other liquid crystal materials, at low temperatures, and a liquid crystal composition containing the same are provided. The liquid crystalline compound is expressed by the formula (1): ##STR1## wherein Q represents CF.sub.3, CF.sub.2 H or CFH.sub.2 ; A.sub.1, A.sub.2 and A.sub.3 each independently represent trans-1,4-cyclohexylene group, 1,4-phenylene group, wherein one or more hydrogen atoms on its six-membered ring may be replaced by F, Cl or CN, pyridine-2,5-diyl group or 1,3-pyrimidine-2,5-diyl; ring B represents 1,4-phenylene group or trans-1,4-cyclohexylene group; Z.sub.1, Z.sub.2 and Z.sub.3 each independently represent covalent bond, --C.dbd.C--, --C.tbd.C--, --OCO--, --COO--, --CH.sub.2 O--, --OCH.sub.2 --, --(CH.sub.2).sub.2 -- or --(CH.sub.2).sub.4 --; l and m each independently represent an integer of 0 to 5; o and p each independently represent 0 or 1; L.sub.1 and L.