A compound includes, in a molecule, a structure A represented by the following A and a structure B represented by the following B, in which the compound includes two or more of the structures B in the molecule. A: A structure in which at least one or more aromatic ring structures are included and a total number of π electrons of the aromatic ring structure in the molecule is 8 or more. However, an aryl amine structure represented by a predetermined structure is excluded. B: A fluorine-containing terminal structure represented by a predetermined structural formula.

A compound includes, in a molecule, a structure A represented by the following A and a structure B represented by the following B, in which the compound includes two or more of the structures B in the molecule. A: A structure in which at least one or more aromatic ring structures are included and a total number of π electrons of the aromatic ring structure in the molecule is 8 or more. However, an aryl amine structure represented by a predetermined structure is excluded. B: A fluorine-containing terminal structure represented by a predetermined structural formula.

Provided are a liquid crystal composition, a liquid crystal cured layer, an optical film, a polarizing plate, and an image display device, each of which suppresses streak defects and has excellent temporal stability. The liquid crystal composition includes a liquid crystal compound and a basic compound, in which a pKa of a conjugate acid of the basic compound is 4 to 10.

Provided are a liquid crystal composition, a liquid crystal cured layer, an optical film, a polarizing plate, and an image display device, each of which suppresses streak defects and has excellent temporal stability. The liquid crystal composition includes a liquid crystal compound and a basic compound, in which a pKa of a conjugate acid of the basic compound is 4 to 10.

There is provided a composition including a first polymer compound having a photoreactive functional group, a second polymer compound, and an ultraviolet absorber having a benzotriazole skeleton, wherein a content of the ultraviolet absorber is less than 20 parts by mass per 100 parts by mass of a total of the first polymer compound and the second polymer compound.

A polarizing film including a polarizer that is a cured product of a polymerizable liquid crystal composition is provided. The polymerizable liquid crystal composition contains both a polymerizable liquid crystal compound having at least one polymerizable group and a dichroic coloring matter. The polarizer is laminated on a surface, having a pore size of 0.45 nm to 0.57 nm, of a base material. The pore size is obtained by converting, into a diameter, an average free volume radius calculated by a positron lifetime measurement method in which the positron lifetime is measured by irradiating the surface with positrons with an injection energy of 3 kV.

A polarizing film including a polarizer that is a cured product of a polymerizable liquid crystal composition is provided. The polymerizable liquid crystal composition contains both a polymerizable liquid crystal compound having at least one polymerizable group and a dichroic coloring matter. The polarizer is laminated on a surface, having a pore size of 0.45 nm to 0.57 nm, of a base material. The pore size is obtained by converting, into a diameter, an average free volume radius calculated by a positron lifetime measurement method in which the positron lifetime is measured by irradiating the surface with positrons with an injection energy of 3 kV.

A polymer film is provided, the polymer film comprises a liquid crystal polymer, comprising a soluble liquid crystal polymer and an insoluble liquid crystal polymer; and a polyimide polymer, accounting for 5 wt % or more of the polymer film. A method for manufacturing the polymer film is also provided, the method for manufacturing the polymer film comprises steps: providing a liquid crystal polymer powder, a particle size of the liquid crystal polymer powder is 0.1 um to 20 um; providing a liquid crystal polymer glue, a solid content of which is greater than 3 wt %; providing a polyamic acid glue; mixing the liquid crystal polymer powder, the liquid crystal polymer glue and the polyamic acid glue into a mixed solution, the mixed solution is made into a gel film, and the gel film is baked at a temperature of 300° C. to form a polymer film.

The invention relates to a compound of formula I,

##STR00001##

wherein R.sup.11, R.sup.21, A.sup.11, A, Z, X.sup.11, X.sup.21, Y.sup.11, Y.sup.12, Sp.sup.11, Sp.sup.21, o and p have one of the meanings as given in claim 1. The invention further relates to method of production of a compound of formula I, to the use of said compounds in LC media and to LC media comprising one or more compounds of formula I. Further, the invention relates to a method of production of such LC media, to the use of such media in LC devices, and to LC device comprising a LC medium according to the present invention. The present invention further relates to a process for the fabrication such liquid crystal display and to the use of the liquid crystal mixtures according to the invention for the fabrication of such liquid crystal display.

The invention relates to a compound of formula I,

##STR00001##

wherein R.sup.11, R.sup.21, A.sup.11, A, Z, X.sup.11, X.sup.21, Y.sup.11, Y.sup.12, Sp.sup.11, Sp.sup.21, o and p have one of the meanings as given in claim 1. The invention further relates to method of production of a compound of formula I, to the use of said compounds in LC media and to LC media comprising one or more compounds of formula I. Further, the invention relates to a method of production of such LC media, to the use of such media in LC devices, and to LC device comprising a LC medium according to the present invention. The present invention further relates to a process for the fabrication such liquid crystal display and to the use of the liquid crystal mixtures according to the invention for the fabrication of such liquid crystal display.