A laminate is provided having excellent adhesiveness between a light absorption anisotropic film and a barrier layer, a manufacturing method of the laminate, and an image display device using the laminate. A laminate having: a barrier layer A; and a light absorption anisotropic film B, in which the barrier layer A is adjacently provided on the light absorption anisotropic film B, a relationship between a highest content of a compound A1 contained in the barrier layer A and a highest content of a compound B1 contained in the light absorption anisotropic film B satisfies a relationship in which a value of distance calculated from Hansen solubility parameters and represented by Formula (I) is within a range of 0.0 to 5.0, and the light absorption anisotropic film B contains a component same as the compound A1.
distance={4×(δ.sub.D(B1)−δ.sub.D(A1)).sup.2+(δ.sub.P(B1)−δ.sub.P(A1)).sup.2+(δ.sub.H(B1)−δ.sub.H(A1)).sup.2}.sup.0.5  (I)

A composition includes an isomerized polymer containing a structural unit containing an isomerized structure and an isomerized low molecular weight compound, the composition being fluidized by light irradiation from a solid state and being reversibly non-fluidized.

Liquid crystal-based devices for detecting a target contaminant in air, including hydrogen, nitrogen dioxide, ozone, ammonia or carbon monoxide, and methods of using such devices to detect the target contaminant are disclosed. Such devices have a substrate surface that includes one or more metals or metal alloys that is in contact with a liquid crystal composition. When the device is contacted with a sample that contains the target contaminant, an observed change in the orientational ordering of the liquid crystal signals the presence of the target contaminant. In the absence of the target contaminant, no change in orientational ordering occurs.

Disclosed is a liquid crystalline epoxy compound wherein an epoxy group is positioned at a side chain of the longer direction of a mesogen group and each of the mesogen group and the epoxy group is connected to the center of the molecular structure through a flexible linkage. Since the liquid crystalline epoxy compound includes an epoxy group positioned at a side chain of the longer direction of a mesogen group and each of the mesogen group and the epoxy group is connected to the center of the molecular structure through a flexible linkage, the interaction between the mesogens in a cured resin product occurs significantly without weakening even after curing, thereby improving the heat conductivity of the resin compound through the active heat transfer between the mesogens.

Disclosed is a liquid crystalline epoxy compound wherein an epoxy group is positioned at a side chain of the longer direction of a mesogen group and each of the mesogen group and the epoxy group is connected to the center of the molecular structure through a flexible linkage. Since the liquid crystalline epoxy compound includes an epoxy group positioned at a side chain of the longer direction of a mesogen group and each of the mesogen group and the epoxy group is connected to the center of the molecular structure through a flexible linkage, the interaction between the mesogens in a cured resin product occurs significantly without weakening even after curing, thereby improving the heat conductivity of the resin compound through the active heat transfer between the mesogens.

A polyamic acid composition is polymerized by dianhydride monomers and diamine monomers. A range of molar ratio of the dianhydride monomers to the diamine monomers is from 0.9 to 1.1. The diamine monomers have a combination of specific functional groups containing at least one nitrogen heterocycle structure, at least one liquid crystal structure, and at least one soft structure, wherein the diamine monomer containing nitrogen heterocycle structure has a molar weight percentage of 3% to 8% of a total molar weight of the diamine monomers, and the diamine monomers containing at least one liquid crystal structure and at least one soft structure have a molar weight percentage of 92% to 97% of the total molar weight of the diamine monomers. The disclosure further relates to a polyimide film, a copper clad laminate, and a printed circuit board.

A laminate is provided having excellent adhesiveness between a light absorption anisotropic film and a barrier layer, a manufacturing method of the laminate, and an image display device using the laminate. A laminate having: a barrier layer A; and a light absorption anisotropic film B, in which the barrier layer A is adjacently provided on the light absorption anisotropic film B, a relationship between a highest content of a compound A1 contained in the barrier layer A and a highest content of a compound B1 contained in the light absorption anisotropic film B satisfies a relationship in which a value of distance calculated from Hansen solubility parameters and represented by Formula (I) is within a range of 0.0 to 5.0, and the light absorption anisotropic film B contains a component same as the compound A1.

distance={4(.sub.D(B1).sub.D(A1)).sup.2+(.sub.P(B1).sub.P(A1)).sup.2+(.sub.H(B1).sub.H(A1)).sup.2}.sup.0.5(I)

The present invention provides a liquid crystal display device that includes a retardation layer with excellent thermal stability and suppresses a decrease in contrast ratio caused by scattering even when the retardation layer has been formed by polymerizing reactive monomers. The liquid crystal display device includes a pair of substrates and a liquid crystal layer held between the substrates. At least one of the substrates includes a retardation layer that contains a polymer of at least one type of monomer. The at least one type of monomer includes a photo-alignment monomer represented by a certain formula.

The present invention provides a liquid crystal display device that includes a retardation layer with excellent thermal stability and suppresses a decrease in contrast ratio caused by scattering even when the retardation layer has been formed by polymerizing reactive monomers. The liquid crystal display device includes a pair of substrates and a liquid crystal layer held between the substrates. At least one of the substrates includes a retardation layer that contains a polymer of at least one type of monomer. The at least one type of monomer includes a photo-alignment monomer represented by a certain formula.

Disclosed is a compound containing a specific structure having an azomethine part, the compound being reversibly fluidized and non-fluidized by being irradiated with light.