Abstract: Disclosed is a polymerizable liquid crystal material wherein an amount of a salt represented by the following formula (I) is less than 0.01 parts by mass per 100 parts by mass of a polymerizable liquid crystal compound, and an amount of a nitrogen-containing compound represented by the following formula (II) is 0.01 parts by mass or less per 100 parts by mass of the polymerizable liquid crystal compound. R1 to R5 each independently represent a hydrogen atom or a C1-C7 alkyl group, R6 and R7 represents a hydrogen atom, and X represents F?, Br?, Cl?, I?, HSO4?, 1/2(HPO42?), H2PO4?, R—C(?O)—O?, 1/2(?O—(C?O)—R?—(C?O)—O?) or R—SO3?, where R represents a hydrogen atom or a monovalent hydrocarbon group, and R? represents a single bond or a divalent hydrocarbon group.

Abstract: Disclosed is a polymerizable liquid crystal material wherein an amount of a salt represented by the following formula (I) is less than 0.01 parts by mass per 100 parts by mass of a polymerizable liquid crystal compound, and an amount of a nitrogen-containing compound represented by the following formula (II) is 0.01 parts by mass or less per 100 parts by mass of the polymerizable liquid crystal compound. 10 to R5 each independently represent a hydrogen atom or a C1-C7 alkyl group, R6 and R7 represents a hydrogen atom, and X represents F?, Br?, Cl?, I?, HSO4?, 1/2(HPO42?), H2PO4?, R—C(?O)—O?, 1/2(?O—(C?O)—R?—(C?O)—O?) or R—SO3?, where R represents a hydrogen atom or a monovalent hydrocarbon group, and R? represents a single bond or a divalent hydrocarbon group.

Abstract: A liquid crystal composition including a polymerizable liquid crystal compound capable of expressing birefringence with reverse wavelength distribution and a surfactant containing a fluorine atom, a 1-octanol/water partition coefficient of the surfactant being less than 5.0.

Abstract: A liquid crystal composition including: a polymerizable liquid crystal compound capable of expressing birefringence with inverse wavelength dispersion; and a (meth)acrylate compound containing two or more (meth)acryloyl groups per one molecule, wherein: an amount of the (meth)acrylate compound is 8 parts by weight or less, the amount being relative to 100 parts by weight of a sum total of the polymerizable liquid crystal compound and the (meth)acrylate compound.

Abstract: A liquid crystal composition including a liquid crystal compound capable of expressing a birefringence with reverse wavelength distribution, a (meth)acrylic acid ester compound other than the liquid crystal compound, and a surfactant containing a fluorine atom, wherein a ratio Mw/Np of a molecular weight Mw of the (meth)acrylic acid ester compound relative to a number of ? electrons Np of the (meth)acrylic acid ester compound is 17 or more and 70 or less, and an amount of the surfactant relative to 100 parts by weight of a total of the liquid crystal compound and the (meth)acrylic acid ester compound is 0.11 part by weight or more and 0.29 part by weight or less.

Abstract: A liquid crystal composition including: a polymerizable liquid crystal compound capable of expressing birefringence with inverse wavelength dispersion; a surfactant containing a fluorine atom; and a solvent, wherein the surfactant contains a fluorine atom at a ratio of 30% by weight or less in a molecule of the surfactant.

Abstract: A method for producing a liquid crystal cured film including a liquid crystal cured layer formed of a cured product of a liquid crystal composition including a liquid crystal compound capable of expressing a birefringence with reverse wavelength distribution and a polymerization initiator, the method including: a step of forming a layer of the liquid crystal composition; a step of giving orientation to the liquid crystal compound contained in the layer of the liquid crystal composition; and a step of curing the layer of the liquid crystal composition, wherein a residue content viscosity of a test composition is 800 cP or less under a condition of a temperature that is the same as a temperature of the layer in the step of giving orientation to the liquid crystal compound, the test composition being the liquid crystal composition from which the polymerization initiator is omitted.

Abstract: A liquid crystal composition including: a polymerizable liquid crystal compound capable of expressing birefringence with inverse wavelength dispersion; and a (meth)acrylate compound containing two or more (meth)acryloyl groups per one molecule, wherein: an amount of the (meth)acrylate compound is 8 parts by weight or less, the amount being relative to 100 parts by weight of a sum total of the polymerizable liquid crystal compound and the (meth)acrylate compound.

Abstract: A liquid crystal composition including a polymerizable liquid crystal compound capable of expressing birefringence with reverse wavelength distribution and a surfactant containing a fluorine atom, a 1-octanol/water partition coefficient of the surfactant being less than 5.0.

Abstract: A liquid crystal cured film includes a liquid crystal cured layer formed of a cured product of a liquid crystal composition containing a polymerizable liquid crystal compound capable of expressing birefringence with reverse wavelength distribution, the polymerizable liquid crystal compound containing an ethylenically unsaturated bond and an aromatic ring. The film satisfies 1.00<X(S)/X(A), where X(S) represents a peak ratio X of one surface of the liquid crystal cured layer; X(A) is a peak ratio X of the other surface of the liquid crystal cured layer; the peak ratio X is a ratio represented by X=I(1)/I(2); I(1) is a peak strength derived from in-plane deformation vibration of the ethylenically unsaturated bond in measurement of infrared total reflection-absorption spectrum; and I(2) is a peak strength derived from stretching vibration of an unsaturated bond of the aromatic ring in measurement of infrared total reflection-absorption spectrum.

Abstract: A liquid crystal composition including: a polymerizable liquid crystal compound capable of expressing birefringence with inverse wavelength dispersion; a surfactant containing a fluorine atom; and a solvent, wherein the surfactant contains a fluorine atom at a ratio of 30% by weight or less in a molecule of the surfactant.

Abstract: The present invention provides a diacetylene derivative represented by the following formula (A) which exhibits liquid crystallinity by itself and has a large refractive index anisotropy or does not exhibit liquid crystallinity by itself but exhibits a large refractive index anisotropy when added to a liquid crystalline compound: R1-Sp1-(Ar1)p-(Ar3)q-(Phe)r-C?C—C?C-(Phe)r-(Ar4)q-(Ar2)p-Sp2-R2??(A) (wherein R1 and R2 are a hydrogen, halogen, cyano, isothiocyanate, alkyl, alkenyl, alkynyl or reactive group, SP1 and SP2 are each a spacer group, Ar1 and Ar2 are each a non-substituted or substituted aromatic carbocyclic or heterocyclic group, Ar3 and Ar4 are each a non-substituted or substituted heterocyclic group, Phe is a non-substituted or substituted 1,4-phenylene group, and p, q and r are each 0 or 1.

Abstract: The present invention provides a diacetylene derivative represented by the following formula (A) which exhibits liquid crystallinity by itself and has a large refractive index anisotropy or does not exhibit liquid crystallinity by itself but exhibits a large refractive index anisotropy when added to a liquid crystalline compound: R1-Sp1-(Ar1)p-(Ar3)q-(Phe)r-C?C—C?C-(Phe)r-(Ar4)q-(Ar2)p-Sp2-R2??(A) (wherein R1 and R2 are a hydrogen, halogen, cyano, isothiocyanate, alkyl, alkenyl, alkynyl or reactive group, SP1 and SP2 are each a spacer group, Ar1 and Ar2 are each a non-substituted or substituted aromatic carbocyclic or heterocyclic group, Ar3 and Ar4 are each a non-substituted or substituted heterocyclic group, Phe is a non-substituted or substituted 1,4-phenylene group, and p, q and r are each 0 or 1.